ORCID Profile
0000-0003-4293-7523
Current Organisation
University of Tasmania
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Renewable Power and Energy Systems Engineering (excl. Solar Cells) | Electrical and Electronic Engineering | Engineering Systems Design | Chemical Thermodynamics And Energetics | Computational Heat Transfer | Energy Generation, Conversion and Storage Engineering | Solid State Chemistry | Materials Engineering | Alloy Materials |
ANZSRC Socio-Economic Objective (SEO)
Energy Storage, Distribution and Supply not elsewhere classified | Renewable Energy not elsewhere classified | Commercial Energy Conservation and Efficiency | Energy storage | Gas—conversion to liquid fuels | Physical sciences
Related Links
Publications
Performance comparison between the combined R134a/CO 2 heat pump and cascade R134a/CO 2 heat pump for space heating
Publisher: Elsevier BV
Date: 02-2017
Driving range evaluation based on different cabin thermal management goals of CO2 heat pumps for electric vehicles
Publisher: Elsevier BV
Date: 2023
Thermodynamic assessment of a cogeneration system with CSP Driven-Brayton and Rankine cycles for electric power and hydrogen production in the framework of the energy and water nexus
Publisher: Elsevier BV
Date: 03-2022
Thermionic and tunneling cooling thermodynamics
Publisher: AIP Publishing
Date: 05-05-2004
DOI: 10.1063/1.1738939
Abstract: We unambiguously identify and derive the irreversibilities and entropy fluxes of the quantum and classical processes that intrinsically limit the performance of thermionic and tunneling chillers. The fundamental tradeoff between cooling flux and efficiency can then be evaluated, including the ramifications for feasible cooling regimes. Quantitative illustrations are provided for real solid-state devices. We cast these results as trajectories in the temperature-entropy plane and unify the thermodynamic perspective of these quantum chillers with that of conventional cooling cycles.
Investigation of characteristics of discharge pressure pulsation in a twin-screw refrigeration compressor
Publisher: SAGE Publications
Date: 06-06-2018
Abstract: In this paper, characteristics of discharge pressure pulsation in a twin-screw refrigeration compressor are investigated. A thermodynamic model is developed and validated using data from a comprehensive experimental study. This validated model is then applied to investigate effects of key parameters including condensing temperature, compressor rotational speed, super-feed pressure, part-load operation, and design parameters on the discharge pressure pulsation. The results showed that the discharge pressure pulsation was mainly due to periodic variations of mass and energy flow from the working volumes to the discharge chamber. As the condensing temperature increased or decreased from the design condition, the compressor was in either over- or undercompression leading to an increase in the litude of the pressure pulsation. The gas super-feed pressure could increase the pressure pulsation at condensing temperatures below the design value and reduce the pressure pulsation at condensing temperatures above the design value. The analysis also demonstrated that the pressure pulsation was lower at part-load conditions. However, the compressor rotational speed increased both the litude and frequency of the pressure pulsation. Theoretical analysis of design parameters indicated that a large discharge volume with a high number of lobes could lower the pressure pulsation. These analyses provide useful information for the compressor design and optimization.
Low load diesel perceptions and practices within remote area power systems
Publisher: IEEE
Date: 09-2015
A Two-Phase Flowback Model for Multiscale Diffusion and Flow in Fractured Shale Gas Reservoirs
Publisher: Hindawi Limited
Date: 2018
DOI: 10.1155/2018/5910437
Abstract: A shale gas reservoir is usually hydraulically fractured to enhance its gas production. When the injection of water-based fracturing fluid is stopped, a two-phase flowback is observed at the wellbore of the shale gas reservoir. So far, how this water production affects the long-term gas recovery of this fractured shale gas reservoir has not been clear. In this paper, a two-phase flowback model is developed with multiscale diffusion mechanisms. First, a fractured gas reservoir is ided into three zones: naturally fractured zone or matrix (zone 1), stimulated reservoir volume (SRV) or fractured zone (zone 2), and hydraulic fractures (zone 3). Second, a dual-porosity model is applied to zones 1 and 2, and the macroscale two-phase flow flowback is formulated in the fracture network in zones 2 and 3. Third, the gas exchange between fractures (fracture network) and matrix in zones 1 and 2 is described by a diffusion process. The interactions between microscale gas diffusion in matrix and macroscale flow in fracture network are incorporated in zones 1 and 2. This model is validated by two sets of field data. Finally, parametric study is conducted to explore key parameters which affect the short-term and long-term gas productions. It is found that the two-phase flowback and the flow consistency between matrix and fracture network have significant influences on cumulative gas production. The multiscale diffusion mechanisms in different zones should be carefully considered in the flowback model.
Experimental investigation of heat transfer characteristics in a vertical multi-tube latent heat thermal energy storage system
Publisher: Elsevier BV
Date: 02-2019
Technology Development of Electric Vehicles: A Review
Publisher: MDPI AG
Date: 23-12-2019
DOI: 10.3390/EN13010090
Abstract: To reduce the dependence on oil and environmental pollution, the development of electric vehicles has been accelerated in many countries. The implementation of EVs, especially battery electric vehicles, is considered a solution to the energy crisis and environmental issues. This paper provides a comprehensive review of the technical development of EVs and emerging technologies for their future application. Key technologies regarding batteries, charging technology, electric motors and control, and charging infrastructure of EVs are summarized. This paper also highlights the technical challenges and emerging technologies for the improvement of efficiency, reliability, and safety of EVs in the coming stages as another contribution.
Review of methanol vehicle policies in China: current status and future implications
Publisher: Elsevier BV
Date: 02-2019
Modeling and performance study of a water-injected twin-screw water vapor compressor
Publisher: Elsevier BV
Date: 11-2017
Energy assessment of office buildings in China using China building energy codes and LEED 2.2
Publisher: Elsevier BV
Date: 2015
Growth of La2CuO4 nanofibers under a mild condition by using single walled carbon nanotubes as templates
Publisher: Elsevier BV
Date: 07-2006
Assessing the prospect of deploying green methanol vehicles in China from energy, environmental and economic perspectives
Publisher: Elsevier BV
Date: 2023
Adsorption Measurements of Methane on Activated Carbon in the Temperature Range (281 to 343) K and Pressures to 1.2 MPa
Publisher: American Chemical Society (ACS)
Date: 10-03-2010
DOI: 10.1021/JE900959W
The development trends of existing building energy conservation and emission reduction—A comprehensive review
Publisher: Elsevier BV
Date: 11-2022
Multi-Scale Insights on the Threshold Pressure Gradient in Low-Permeability Porous Media
Publisher: MDPI AG
Date: 02-03-2020
DOI: 10.3390/SYM12030364
Abstract: Low-permeability porous medium usually has asymmetric distributions of pore sizes and pore-throat tortuosity, thus has a non-linear flow behavior with an initial pressure gradient observed in experiments. A threshold pressure gradient (TPG) has been proposed as a crucial parameter to describe this non-linear flow behavior. However, the determination of this TPG is still unclear. This study provides multi-scale insights on the TPG in low-permeability porous media. First, a semi-empirical formula of TPG was proposed based on a macroscopic relationship with permeability, water saturation, and pore pressure, and verified by three sets of experimental data. Second, a fractal model of capillary tubes was developed to link this TPG formula with structural parameters of porous media (pore-size distribution fractal dimension and tortuosity fractal dimension), residual water saturation, and capillary pressure. The effect of pore structure complexity on the TPG is explicitly derived. It is found that the effects of water saturation and pore pressure on the TPG follow an exponential function and the TPG is a linear function of yield stress. These effects are also spatially asymmetric. Complex pore structures significantly affect the TPG only in the range of low porosity, but water saturation and yield stress have effects on a wider range of porosity. These results are meaningful to the understanding of non-linear flow mechanism in low-permeability reservoirs.
An Improved Relative Permeability Model for Gas-Water Displacement in Fractal Porous Media
Publisher: MDPI AG
Date: 19-12-2019
DOI: 10.3390/W12010027
Abstract: Many researchers have revealed that relative permeability depends on the gas-water-rock interactions and ultimately affects the fluid flow regime. However, the way that relative permeability changes with fractal porous media has been unclear so far. In this paper, an improved gas-water relative permeability model was proposed to investigate the mechanism of gas-water displacement in fractal porous media. First, this model took the complexity of pore structure, geometric correction factor, water film, and the real gas effect into account. Then, this model was compared with two classical models and verified against available experimental data. Finally, the effects of structural parameters (pore-size distribution fractal dimension and tortuosity fractal dimension) on gas-water relative permeability were investigated. It was found that the sticking water film on the surface of fracture has a negative effect on water relative permeability. The increase of geometric correction factor and the ignorance of real gas effect cause a decrease of gas relative permeability.
Experimental investigation of an adsorption desalination plant using low-temperature waste heat
Publisher: Elsevier BV
Date: 12-2005
Development and field test of a high-temperature heat pump used in crude oil heating
Publisher: SAGE Publications
Date: 12-08-2015
Abstract: In this paper, a high-temperature heat pump (HTHP) is developed and manufactured to replace the traditional oil-fired boiler heater for crude oil heating. It extracts thermal energy from waste hot water separated from the crude oil to provide high-temperature hot water to heat the crude oil. A prototype of the HTHP system is installed in the Jinzhou oil treatment station in Liaoning, China and the field test is conducted for about 6000 h. A typical 144 h of field testing data is analyzed to evaluate the performance of the designed HTHP system. It is observed that the temperature of hot water provided by the HTHP unit varies from 86 ℃ to 95 ℃ throughout the whole operating period and is sufficient for the crude oil heating (80–90 ℃). The heating capacity and power consumption of the HTHP system varies from 1350 to 1785 kW, and 171 to 197 kW, respectively. The overall system coefficient of performance ranges from 3.5 to 4.4 with an average value of 3.8. Based on the experimental results, a primary energy ratio is introduced to evaluate and compare the economics of the studied HTHP system and oil-fired boiler heater. The comparison shows that the energy consumed by the HTHP unit is only 57% of that consumed by the oil-fired boiler heater. If all traditional oil-fired boiler heaters are replaced by the HTHPs in the Jinzhou oil treatment station, the total yearly energy saving is around 1.12 × 10 4 tons of equivalent coal which equates to 1.76 × 10 4 tons of CO 2 emissions.
Experimental investigation on a capillary tube based transcritical CO 2 heat pump system
Publisher: Elsevier BV
Date: 02-2017
Applications of Machine Learning to Reciprocating Compressor Fault Diagnosis: A Review
Publisher: MDPI AG
Date: 21-05-2021
DOI: 10.3390/PR9060909
Abstract: Operating condition detection and fault diagnosis are very important for reliable operation of reciprocating compressors. Machine learning is one of the most powerful tools in this field. However, there are very few comprehensive reviews which summarize the current research of machine learning in monitoring reciprocating compressor operating condition and fault diagnosis. In this paper, the recent application of machine learning techniques in reciprocating compressor fault diagnosis is reviewed. The advantages and challenges in the detection process, based on three main monitoring parameters in practical applications, are discussed. Future research direction and development are proposed.
Theoretical Investigation of Combustion and Performance Analysis of Diesel Engine under Low Load Conditions
Publisher: IOP Publishing
Date: 08-2021
DOI: 10.1088/1755-1315/838/1/012013
Abstract: Diesel engine is using prominently in islands and remote areas due to its reliability and stability for power generation. In recent years, most of the isolated power systems (e.g., islands and remote areas) have integrated renewable energies to reduce both the cost and pollution in diesel power generating system. However, due to intermittent and stochastic behaviour of renewable sources (e.g., solar and wind), it is unable to eliminate diesel generation entirely. In that case, low-load diesel operation (operation 30% of maximum rated load) is particularly relevant for its ability to support higher levels of renewable penetration. In this paper, a thermodynamic model was developed using MATLAB for diesel engine combustion and performance. This model includes sub models such as heat release rate, heat transfer, double-Wiebe function, and ignition delay correlation. Engine thermal efficiency (TE), brake power (BP), indicated mean effective pressure (IMEP) and brake specific fuel consumption (BSFC) has been taken into consideration for performance analysis. The simulation results show that at 25% load, in-cylinder pressure and temperature are 168 bar and 2300 K which are the cause of lower heat release rate (74 J/deg) and longer ignition delay (0.25 ∼0.5 ms higher than that of conventional mode) and significantly responsible for lower efficiency (18%), brake power (4kW) and higher brake specific fuel consumption (1.2 g/kWh).
Simulation and optimisation of opened sewage concentration air cycle combined with the heat pump under actual weather conditions
Publisher: IOP Publishing
Date: 09-2021
DOI: 10.1088/1757-899X/1180/1/012060
Abstract: Opened air cycle is a promising sewage concentration technology using heated air as the medium to absorb water from the sewage. Unlike closed cycles, the air flow is directly ejected out of the system after humidification in opened cycles. Operating conditions and the circle’s efficiency are highly affected by the weather, such as the time-varying ambient temperature and relative humidity. Since the evaporating temperature relies on the ambient temperature, to restrain its dependence, the evaporator was proposed combined with the ejected air flow in this paper. Such a design could improve the efficiency of the heat pump by increasing its evaporating temperature. Simulation of the newly proposed open sewage concentration cycle was performed to investigate its thermal process and economic efficiency under actual weather conditions. Thermodynamic models of the compressor, heat exchangers and the sewage concentration chamber were established. Climatic conditions at Xi’an, China were referenced as actual weather conditions. Optimisation of the working parameters was performed to achieve higher economic index. The results demonstrated that the average monthly power consumption of the optimized cycle was 0.3508 kWh/kg. Compared with the published data of the closed cycle, the total cost of new opened cycle was nearly one-third lower.
Experimental study on performance improvement of a four-bed adsorption chiller by using heat and mass recovery
Publisher: Elsevier BV
Date: 09-2006
Evaluating Consumer Acceptance of the Commercial Fleet of Methanol Vehicles in China
Publisher: Frontiers Media SA
Date: 08-12-2021
DOI: 10.3389/FENRG.2021.792982
Abstract: To enhance domestic energy security and reduce air pollution, China has accelerated the deployment of alternative fuel vehicles including methanol vehicles since the 2010s. Already completed pilot projects have demonstrated that methanol vehicles (commercial fleet) are economical, environmentally friendly, and technically mature. Therefore, the Chinese government aims to continually deploy methanol vehicles in coal-rich provinces. There are more than 20,000 methanol taxis in operation in China, it is important to evaluate the existing consumer acceptance of such commercial fleet before commercialization in a wider range. This paper proposes a conceptual model to identify consumer acceptance of methanol taxis. The model generates hypotheses that have been tested using surveys completed by taxi drivers of methanol vehicles in the cities of Xi’an (Shaanxi province) and Guiyang (Guizhou province). Results demonstrate that market, economic, and technological concerns strongly determine the consumer acceptance of the commercial fleet of methanol vehicles in China.
Effects of lubricating oil on the performance of a semi-hermetic twin screw refrigeration compressor
Publisher: Elsevier BV
Date: 02-2017
Study of effect of heat transfer in an air storage vessel on performance of a pumped hydro compressed air energy storage system
Publisher: Elsevier BV
Date: 02-2020
Connecting battery technologies for electric vehicles from battery materials to management
Publisher: Elsevier BV
Date: 02-2022
Investigations on the dynamic characteristic and its influence factors of a transcritical CO2 automobile heat pump
Publisher: Informa UK Limited
Date: 03-12-2020
Development of the effective defrosting criterion for electric vehicles transcritical CO2 heat pumps under constant heating capacity operation
Publisher: Elsevier BV
Date: 2023
Numerical investigation on hydrogen-diesel dual-fuel engine improvements by oxygen enrichment
Publisher: Elsevier BV
Date: 07-2022
Analysis of a single-effect mechanical vapor compression desalination system using water injected twin screw compressors
Publisher: Elsevier BV
Date: 2014
Thermodynamic analysis of diesel engine ignition delay under low load conditions
Publisher: Elsevier BV
Date: 06-2022
Enhancing Chinese Students’ Learning in an Australian 2+2 Undergraduate Engineering Program
Publisher: Sciedu Press
Date: 26-09-2018
DOI: 10.5430/IJHE.V7N5P86
Abstract: Undergraduate engineering units (subjects) are delivered by Australian academics at two universities in China over a three-week period. Students may choose to transfer to the Australian university to complete the final two years of the Bachelor of Engineering with Honours degree (2+2 program). The aim of this study is to determine what strategies are most effective for the Australian university academics to adopt for effective delivery of engineering units at Chinese universities. A mixed methods approach was applied to in-class feedback and student surveys. Three major themes: Language, Learning and Social were identified. These themes were further explored in a quantitative survey of Chinese students newly-arrived in Australia in 2016. Successful strategies for delivering engineering units included referring questions to discussion groups students explaining difficult concepts to other students writing key words on the board and flash cards. The principal concern for students before they transferred to Australia was the teaching and learning style of the Australian university academics. However, English language proficiency was the major concern for students transferred to Australia. The strategy for improving Chinese students’ engagement and learning outcomes should focus on additional support both in China and Australia.
Cold climate energy production
Publisher: IEEE
Date: 09-2013
Study of transient indoor temperature for a HVAC room using a modified CFD method
Publisher: Elsevier BV
Date: 02-2019
Status, challenges and opportunities of dual fuel hybrid approaches-a review
Publisher: Elsevier BV
Date: 10-2021
Application of geothermal absorption air-conditioning system: A case study
Publisher: Elsevier BV
Date: 2012
Study of flow characteristics of an oscillating heat pipe
Publisher: Elsevier BV
Date: 09-2019
Experimental Investigation on the Performance of a Twin-screw Expander Used in an ORC System
Publisher: Elsevier BV
Date: 03-2017
Numerical Study of Fracture Network Evolution during Nitrogen Fracturing Processes in Shale Reservoirs
Publisher: MDPI AG
Date: 20-09-2018
DOI: 10.3390/EN11102503
Abstract: This paper develops a numerical model to study fracture network evolution during the nitrogen fracturing process in shale reservoirs. This model considers the differences of incompressible and compressible fluids, shear and tensile failure modes, shale heterogeneity, and the strength and permeability of both shale matrix and bedding planes through the coupling of mechanical-seepage-damage during fracturing fluid injection. The results show that nitrogen fracturing has a lower breakdown pressure and larger seepage zone than hydraulic fracturing under the same injection pressure. Tensile failure was identified as the major reason for the initiation and propagation of fractures. Ignoring the effect of bedding planes, the fracture initiation pressure, breakdown pressure, and fracturing effectiveness reached their maxima when the stress ratio is 1. Under the same strength ratio, the propagation path of the fractures was controlled by the stronger effect that was casused by the bedding angle and stress ratio. With increasing the strength ratio, the fracture number and shearing of the bedding plane increased significantly and the failure pattern changed from tensile-only mode to tensile-shear mode. These analyses indicated that the fracture network of bedding shale was typically induced by the combined impacts of stress ratio, bedding angle and strength ratio.
Control strategies for maximizing renewable energy utilization in power systems
Publisher: No publisher found
Date: 2019
Analysis and Optimization of Truck Windshield Defroster
Publisher: MDPI AG
Date: 15-08-2020
DOI: 10.3390/APP10165671
Abstract: Frosting and fogging of automobile windshields is a common problem that emerges in daily driving. It is important and essential to quickly and completely defrost the windshield for safety purposes. In this study, a three-dimensional mathematical model was applied to investigate the flow distribution and flow characteristics on the windshield of a medium-size Model N800 truck. The simulation results were first compared with experimental data. The results showed that the simulation model could reliably predict the defrosting performance on the windshield. This model was then used to optimize the design of the defrosting duct that comprised the main part of the defroster. It was found that the guide plate and outlet position of the defrosting duct were the two major factors affecting the defrosting performance. Therefore, the guide plate was first optimized and the defrosting performance was analyzed. The results showed that the average pressure loss dropped by 21.56%, while the defrosting efficiency at the front white zone was improved to 89%. The position of the outlet of the airflow was further studied. The results showed that the defrosting efficiency at the front zone could be further improved to 99%.
A thermogravimetric analyzer for condensable gas adsorption under subatmospheric conditions
Publisher: Springer Science and Business Media LLC
Date: 10-07-2007
Melting characteristics of a longitudinally finned-tube horizontal latent heat thermal energy storage system
Publisher: Elsevier BV
Date: 12-2021
Evaporative Cooling Integrated with Solid Desiccant Systems: A Review
Publisher: MDPI AG
Date: 21-09-2021
DOI: 10.3390/EN14185982
Abstract: Evaporative cooling technology (ECT) has been deemed as an alternative to the conventional vapor-compression air conditioning system for dry climates in recent years due to its simple structure and low operating cost. Generally speaking, the ECT includes two types of different technologies, direct evaporative cooling (DEC) and indirect evaporative cooling (IEC). Both technologies can theoretically reduce the air temperature to the wet-bulb temperature of outdoor air. The major difference between these two technologies is that DEC will introduce extra moisture to the supply air while IEC will not. The enhanced IEC, Maisotsenko-cycle (M-cyle) IEC, can even bring down the air temperature to the dew point temperature. The ECT integrated with solid desiccant systems, i.e., solid desiccant-assisted evaporative cooling technologies (SDECT), could make the technology applicable to a wider range of weather conditions, e.g., weather with high humidity. In this paper, the recent development of various evaporative cooling technologies (ECT), solid desiccant material and the integration of these two technologies, the SDECT, were thoroughly reviewed with respect to their configuration, optimization and desiccant unit improvement. Furthermore, modeling techniques for simulating SDECT with their pros and cons were also reviewed. Potential opportunities and research recommendations were indicated, which include improving the structure and material of M-cycle IEC, developing novel desiccant material and optimizing configuration, water consumption rate and operation strategy of SDECT system. This review paper indicated that the SDECT system could be a potential replacement for the conventional vapor-compressed cooling system and could be applied in hot and humid environments with proper arrangements.
Study on a novel district heating system combining clean coal-fired cogeneration with gas peak shaving
Publisher: Elsevier BV
Date: 2020
Solar Hot Water Systems Using Latent Heat Thermal Energy Storage: Perspectives and Challenges
Publisher: MDPI AG
Date: 16-02-2023
DOI: 10.3390/EN16041969
Abstract: Domestic water heating accounts for 15% to 27% of the total energy consumption in buildings in Australia. Over the past two decades, the latent heat thermal energy storage (LHTES) system has been widely investigated as a way to reduce fossil fuel consumption and increase the share of renewable energy in solar water heating. However, the research has concentrated on the geometric optimisation of the LHTES heat exchanger for the past few years, and this might not be sufficient for commercialisation. Moreover, recent review papers mainly discussed the development of a particular heat-transfer improvement technique. This paper presents perspectives on various solar hot water systems using LHTES to shift focus to on-demand performance studies, as well as structure optimisation studies for faster commercialisation. Future challenges are also discussed. Since the topic is an active area of research, this paper focuses on references that showcase the overall performance of LHTES-assisted solar hot water systems and cannot include all published work in the discussion. This perspective paper provides directional insights to researchers for developing an energy-efficient solar hot water system using LHTES.
A Bench Evaluation Test for Refrigeration Oils in a Refrigeration System Using a Screw Compressor
Publisher: MDPI AG
Date: 06-08-2019
DOI: 10.3390/APP9153202
Abstract: Refrigeration oil has a large effect on the performance of refrigeration systems. However, the physical and chemical indexes of fresh refrigeration oils often fail to reflect the actual operating characteristics, especially with respect to the degradation of refrigeration oils. In this paper, a bench evaluation test of refrigeration oils was carried out to investigate the degradation of synthetic refrigeration oils used with the refrigerant R134a, in a purpose-built, full-scale refrigeration system utilizing a screw compressor. To accelerate the degradation process of the refrigeration oil, the discharge temperature at the exit of the compressor was turned to a high level. Comparison tests of a mature refrigeration oil type A and a newly developed oil type B were performed under the same working conditions with 500 h of operating time. The performance of the screw compressor and refrigeration system was analyzed. The abrasion of the screw rotors and carbon deposition at the discharge port was investigated. Results showed that the bench evaluation test successfully predicted the degradation process of the refrigeration oils. The evolution analysis of the refrigeration oil viscosity and acid value during the bench evaluation test indicated that 15% of the physical and chemical indexes for refrigeration oil drain were too strict. Research work in this paper showed a more practical method to evaluate the performance of refrigeration oils through the bench evaluation test.
The role of modified diesel generation within isolated power systems
Publisher: Elsevier BV
Date: 02-2022
Melting and solidification characteristics of a semi-rotational eccentric tube horizontal latent heat thermal energy storage
Publisher: Elsevier BV
Date: 09-2022
Exergy analysis of a one-stage adiabatic compressed air energy storage system
Publisher: Elsevier BV
Date: 02-2019
An up-to-date review on the design improvement and optimization of the liquid-cooling battery thermal management system for electric vehicles
Publisher: Elsevier BV
Date: 2023
Absorption cooling systems – Review of various techniques for energy performance enhancement
Publisher: Elsevier BV
Date: 04-2020
Investigations on optimal discharge pressure in CO2 heat pumps using the GMDH and PSO-BP type neural network—Part A: Theoretical modeling
Publisher: Elsevier BV
Date: 10-2019
Analysis of a novel solid desiccant evaporative cooling system integrated with a humidification-dehumidification desalination unit
Publisher: Elsevier BV
Date: 03-2023
Numerical and experimental investigations on the failure mechanism of the suction valve in the refrigerator compressor under unconventional conditions
Publisher: Elsevier BV
Date: 09-2020
A Study of Variable Cell Spacings to the Heat Transfer Efficiency of Air-Cooling Battery Thermal Management System
Publisher: MDPI AG
Date: 24-11-2021
DOI: 10.3390/APP112311155
Abstract: The air-cooling battery thermal management system has been widely adopted as the thermal management device for power accumulators on electric vehicles nowadays. To improve the system heat transfer coefficient with the minimum rise in cost, this study modified conventional rectangular cell arrangements for 21,700 cylindrical cell battery packs with two approaches: 1. increase the vertical spacings 2. convert constant vertical spacings to gradient vertical spacings. The results show that smaller vertical spacings are beneficial to the overall cooling performances of the constant vertical spacings designs at almost all flow rates. The gradient vertical spacing design with larger spacing could deliver better temperature uniformity, while the one with smaller spacings could suppress the maximum temperature more efficiently at higher flow rates. However, the total battery pack volume of Design 7 (the largest gradient vertical spacing design) is 7.5% larger than the conventional design.
Shear flow assisted decoration of carbon nano-onions with platinum nanoparticles
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CC41647J
Abstract: Aqueous based controlled decoration of platinum nanoparticles on plasma treated carbon nano-onions (CNOs) occurs within the shear flow generated by a vortex fluidic device (VFD), using ascorbic acid as the reducing agent, with the electrocatalytic potential of the resulting Pt-NPs@CNOs nano-composites demonstrated.
Heat transfer mechanism in solar thermal energy storage systems using phase change materials
Publisher: Global Science & technology Forum ( GSTF )
Date: 22-02-2016
Thermodynamic and exergy analysis of a combined pumped hydro and compressed air energy storage system
Publisher: Elsevier BV
Date: 07-2019
Study on surface condensate water removal and heat transfer performance of a minichannel heat exchanger
Publisher: MDPI AG
Date: 03-2020
DOI: 10.3390/EN13051065
Abstract: The condensate on the surface of the minichannel heat exchanger generated during air cooling substantially reduces the heat transfer performance as it works as an evaporator in the air-conditioning system. This has received much attention in scientific communities. In this paper, the effect of operating parameters on the heat transfer performance of a minichannel heat exchanger (MHE) is investigated under an evaporator working condition. An experimental MHE test system is developed for this purpose, and extensive experimental studies are conducted under a wide range of working conditions using the water-cooling method. The inlet air temperature shows a large effect on the overall heat transfer coefficient, while the inlet air relative humidity shows a large effect on the condensate aggregation rate. The airside heat transfer coefficient increases from 66 to 81 W/(m2·K) when the inlet air temperature increases from 30 to 35 °C. While the condensate aggregation rate on the MHE surface increases by up to 1.8 times when the relative humidity increases from 50% to 70%. The optimal air velocity, 2.5 m/s, is identified in terms of the heat transfer rate and airside heat transfer coefficient of the MHE. It is also found that the heat transfer rate and overall heat transfer coefficient increase as the air velocity increases from 1.5 to 2.5 m/s and decreases above 2.5 m/s. Furthermore, a large amount of condensate accumulates on the MHE surface lowering the MHE heat transfer. The inclined installation angle of the MHE in the wind tunnel effectively enhances heat transfer performance on the MHE surface. The experimental results provide useful information for reducing condensate accumulation and enhancing microchannel heat transfer.
Light-driven high-temperature continuous-flow synthesis of TiO2 nano-anatase
Publisher: Elsevier BV
Date: 11-2012
Structure improvement of a 126 kV vacuum circuit breaker using electromagnetic-thermal field coupling simulation
Publisher: Elsevier BV
Date: 09-2019
Performance Improvement of a Novel Trapezoid Air-Cooling Battery Thermal Management System for Electric Vehicles
Publisher: MDPI AG
Date: 21-04-2022
DOI: 10.3390/SU14094975
Abstract: An air-cooling battery thermal management system is a reliable and cost-effective system to control the operating temperatures of the electric vehicle battery pack within an ideal range. Different from most designs of the rectangular battery pack in previous research, this one proposed a novel isosceles trapezoid layout to improve system heat dissipations. The simulation results showed that the trapezoid design delivered better cooling performances than the rectangular one with a maximum temperature reduction of 0.9 °C and maximum temperature difference reduction of 1.17 °C at the inlet air flow rate of 60 L/s. Moreover, the cooling performance was further boosted by an aluminum heat spreader. The boosted design delivers an average Max T (32.95 °C) and an average ΔT (3.10 °C) at five different flow rates, which are 8.8% and 66.1% lower the one without the spreader (35.85 °C and 5.15 °C). Compared with the rectangular design without the spreader, the average Max T and ΔT of the boosted trapezoid design are reduced by 10.4% and 91.9% in addition to a space-saving of about 5.26%.
Solar domestic hot water systems using latent heat energy storage medium: A review
Publisher: Elsevier BV
Date: 09-2015
Tri-stage optimal scheduling for an islanded microgrid based on a quantum adaptive sparrow search algorithm
Publisher: Elsevier BV
Date: 06-2022
Experimental investigation of multiple tube heat transfer enhancement in a vertical cylindrical latent heat thermal energy storage system
Publisher: Elsevier BV
Date: 09-2019
A lattice Boltzmann model for thermal non-Newtonian fluid flows through porous media
Publisher: Elsevier BV
Date: 11-2018
Investigation of the effect of geometric and operating parameters on thermal behavior of vertical shell-and-tube latent heat energy storage systems
Publisher: Elsevier BV
Date: 10-2017
Comprehensive strategies for performance improvement of adsorption air conditioning systems: A review
Publisher: Elsevier BV
Date: 2019
Multi-objective optimal scheduling of microgrid with electric vehicles
Publisher: Elsevier BV
Date: 11-2022
Thermal performance of insulated gate bipolar transistor module using microchannel cooling base plate
Publisher: Elsevier BV
Date: 2022
Performance optimization of an integrated adsorption-absorption cooling system driven by low-grade thermal energy
Publisher: Elsevier BV
Date: 07-2021
Optimal plan for energy conservation and CO2 emissions reduction of public buildings considering users' behavior: Case of China
Publisher: Elsevier BV
Date: 12-2022
Theoretical and experimental study on conveying behavior of a twin-screw multiphase pump
Publisher: SAGE Publications
Date: 02-09-2014
Abstract: In this paper, the conveying behavior of a twin-screw multiphase pump is investigated when it pumps either pure water or gas–liquid mixtures with gas void fractions varying from 20% to 90%. A prototype of the twin-screw multiphase pump is developed and set up in a laboratory for this purpose. A theoretical model is established to evaluate backflow rates in the twin-screw pump clearances, total pump volume flow rates, and power consumptions at various pressure differences and gas void fractions. Results show that the predictions from the model agree well with experimental data. For pumping pure water, the power consumption increases by 45.3% when the pressure difference between inlet and outlet of the twin-screw multiphase pump increases from 0.6 to 1.0 MPa. However, the effect of the pressure difference on the total pump flow rate is negligible. For pumping air–water mixtures, the pressure difference has a significant effect on both power consumption and total volume flow rate of the multiphase pump. The pump power consumption increases by more than 40% when the pressure difference increases from 0.4 to 1.0 MPa. On the contrary, the pump volume flow rate decreases between 10% and 30% varying with the gas void fraction value. However, at the fixed pressure differences of 0.4 MPa and 1.0 MPa, the pump power consumption does not show much difference with the change of gas void fractions from 20% to 90% although the total pump volume flow rate reduces by 18.7% and 25.7%, respectively.
Study of the thermo-mechanical couple deformation of the meshing pairs of a single-screw compressor
Publisher: SAGE Publications
Date: 05-07-2021
DOI: 10.1177/09544089211028775
Abstract: Single-screw compressor has attracted attentions from the scientific community due to its excellent performance. However, thermal deformations of the star wheel, screw, and casing substantially affect the clearance between the components, and hence reduce the performance of the single-screw compressor. In this study, the thermal deformation of a meshing pair of the single-screw compressor was investigated using a finite-element-based thermo-mechanical coupled model. This model was developed based on measured thermal boundary conditions during compressor operation. The effect of thermal deformation on the compressor sealing clearance was then studied. The results showed that the thermal deformation of the casing, screw, screw shaft, and star wheel significantly affected the clearance between the tooth tip and the groove bottom as well as the meshing pair clearance distribution. The change of clearance between the casing and screw is up to 0.03 mm while the change of the clearance between the star wheel tooth tip and screw groove is up to 0.05 mm. Furthermore, it was found that the spatial position meshing error caused by the thermal deformation was one of the major reasons for the wear of the meshing pair of the single-screw compressor. The simulated thermal deformation results agreed well with the experimental data. The clearances of the compressor were modified based on the thermal deformation in a single-screw compressor with a capacity of 6 m 3 /min and the results showed that the modified compressor can operate reliably. This indicated that the developed model could be used in the design of the single-screw compressor. It provides guidance for the design and optimization of large single-screw compressors.
A comparative study of thermal behaviour of a horizontal and vertical shell-and-tube energy storage using phase change materials
Publisher: Elsevier BV
Date: 2016
Performance investigations of an R404A air-source heat pump with an internal heat exchanger for residential heating in northern China
Publisher: Elsevier BV
Date: 07-2016
Numerical analysis and surrogate model optimization of air-cooled battery modules using double-layer heat spreading plates
Publisher: Elsevier BV
Date: 09-2021
Thermal and hydraulic analysis on the flow around the motor in semi-hermetic twin screw refrigeration compressors
Publisher: Elsevier BV
Date: 09-2013
The Role of Low-Load Diesel in Improved Renewable Hosting Capacity within Isolated Power Systems
Publisher: MDPI AG
Date: 05-08-2020
DOI: 10.3390/EN13164053
Abstract: Isolated communities are progressively integrating renewable generation to reduce the societal, economic and ecological cost of diesel generation. Unfortunately, as renewable penetration and load variability increase, systems require greater diesel generation reserves, constraining renewable utilisation. Improved diesel generator flexibility can reduce the requirement for diesel reserves, allowing increased renewable hosting. Regrettably, it is uncommon for utilities to modify diesel generator control during the integration of renewable source generation. Identifying diesel generator flexibility and co-ordination as an essential component to optimising system hosting capacity, this paper investigates improved diesel generator flexibility and coordination via low-load diesel application. Case study comparisons for both high- and low-penetration hybrid diesel power systems are presented in King Island, Australia, and Moloka`i, Hawai`i, respectively. For King Island, the approach details a 50% reduction in storage requirement, while for Moloka`i the application supports a 27% increase in renewable hosting capacity.
A 3-D thermal network model for the temperature monitoring of thermal grease as interface material
Publisher: Elsevier BV
Date: 11-2020
Multi-scale simulation on dynamic performance of an integrated pumping and compression evaporative electronic cooling system
Publisher: Elsevier BV
Date: 2018
A Multiscale Fractal Transport Model with Multilayer Sorption and Effective Porosity Effects
Publisher: Springer Science and Business Media LLC
Date: 03-04-2019
Investigation on optimal shell-to-tube radius ratio of a vertical shell-and-tube latent heat energy storage system
Publisher: Elsevier BV
Date: 11-2020
Multi-criteria analysis of policies for implementing clean energy vehicles in China
Publisher: Elsevier BV
Date: 06-2019
Performance evaluation of a solar adsorption chiller under different climatic conditions
Publisher: Elsevier BV
Date: 08-2016
Predicting the Integral Heat of Adsorption for Gas Physisorption on Microporous and Mesoporous Adsorbents
Publisher: American Chemical Society (ACS)
Date: 14-04-2014
DOI: 10.1021/JP410873V
Theoretical and experimental investigation of a combined R134a and transcritical CO2 heat pump for space heating
Publisher: Elsevier BV
Date: 12-2016
Performance evaluation of a capacity-regulated high temperature heat pump for waste heat recovery in dyeing industry
Publisher: Elsevier BV
Date: 2016
Experimental and numerical characterization of natural convection in a vertical shell-and-tube latent thermal energy storage system
Publisher: Elsevier BV
Date: 11-2017
A comparative evaluation of two different heat-recovery schemes as applied to a two-bed adsorption chiller
Publisher: Elsevier BV
Date: 02-2007
Utilization and Optimization of Diesel Generation for Maximum Renewable Energy Integration
Publisher: Springer International Publishing
Date: 2017
Remote areas and islands power generation: A review on diesel engine performance and emission improvement techniques
Publisher: Elsevier BV
Date: 05-2022
Theoretical investigation on the combined and cascade CO2/R134a heat pump systems for space heating
Publisher: Elsevier BV
Date: 09-2017
The experimental investigation on a novel transcritical CO2 heat pump combined system for space heating
Publisher: Elsevier BV
Date: 10-2019
Thermal analysis of a single-storey livestock barn
Publisher: SAGE Publications
Date: 04-2016
Abstract: Theoretical thermal analysis of the barned livestock environment affords owners the opportunity to explore process efficiency, energy substitution and animal response ahead of costly and time-consuming field trials. In this article, a thermodynamic model is developed and experimentally validated against a homogeneous, cage-free, single-storey broiler barn. The simulation predictions agree well with the experimental results. The average root mean square error is 5.8% for the temperature prediction and 6.3% for the humidity prediction. The model further allows assessment of heating and ventilation efficiency, demonstrating the significant energy savings available to insulated barned structures, with such efficiency measures recommended ahead of any consideration for energy substitution.
Study of the effect of tilting lateral surface angle and operating parameters on the performance of a vertical shell-and-tube latent heat energy storage system
Publisher: Elsevier BV
Date: 12-2019
Experimental Investigation into the Effect of Oil Injection on the Performance of a Variable Speed Twin-Screw Compressor
Publisher: MDPI AG
Date: 25-05-2018
DOI: 10.3390/EN11061342
Plastic-made diesel (PMD) from pyrolysis via vacuum distillation process- A waste recycling fuel to diesel engine performance and emissions improvement
Publisher: Elsevier BV
Date: 04-2023
Study of thermal performance of air-source heat-pump heating for suburban residential buildings in Beijing
Publisher: Informa UK Limited
Date: 19-04-2020
Cost-Efficient Strategy for High Renewable Energy Penetration in Isolated Power Systems
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2020
Performance analysis of solar-assisted-geothermal combined cooling, heating, and power (CCHP) systems incorporated with a hydrogen generation subsystem
Publisher: Elsevier BV
Date: 04-2023
Experimental investigation of the optimal heat rejection pressure for a transcritical CO2 heat pump water heater
Publisher: Elsevier BV
Date: 07-2013
Combined Effects of CO2 Adsorption-Induced Swelling and Dehydration-Induced Shrinkage on Caprock Sealing Efficiency
Publisher: MDPI AG
Date: 06-11-2022
Abstract: Carbon dioxide (CO2) may infiltrate into the caprock and displace brine water in the caprock layer. This causes two effects: one is the caprock swelling induced by the CO2 adsorption and the other is the caprock dehydration and shrinkage due to CO2–brine water two-phase flow. The competition of these two effects challenges the caprock sealing efficiency. To study the evolution mechanism of the caprock properties, a numerical model is first proposed to investigate the combined effects of CO2 adsorption-induced expansion and dehydration-induced shrinkage on the caprock sealing efficiency. In this model, the caprock matrix is fully saturated by brine water in its initial state and the fracture network has only a brine water–CO2 two-phase flow. With the diffusion of CO2 from the fractures into the caprock matrix, the CO2 sorption and matrix dehydration can alter the permeability of the caprock and affect the entry capillary pressure. Second, this numerical model is validated with a breakthrough test. The effects of the two-phase flow on the water saturation, CO2 adsorption on the swelling strain, and dehydration on the shrinkage strain are studied, respectively. Third, the permeability evolution mechanism in the CO2–brine water mixed zone is investigated. The effect of dehydration on the penetration depth is also analyzed. It is found that both the shale matrix dehydration and CO2 sorption-induced swelling can significantly alter the sealing efficiency of the fractured caprock.
Parallel changes in the proceptive and receptive behaviour of the ewe
Publisher: Elsevier BV
Date: 08-1990
High-yield synthesis of silicon carbide nanowires by solar and lamp ablation
Publisher: IOP Publishing
Date: 23-07-2013
DOI: 10.1088/0957-4484/24/33/335603
Abstract: We report a reasonably high yield (~50%) synthesis of silicon carbide (SiC) nanowires from silicon oxides and carbon in vacuum, by novel solar and l photothermal ablation methods that obviate the need for catalysis, and allow relatively short reaction times (~10 min) in a nominally one-step process that does not involve toxic reagents. The one-dimensional core/shell β-SiC/SiOx nanostructures-characterized by SEM, TEM, HRTEM, SAED, XRD and EDS-are typically several microns long, with core and outer diameters of about 10 and 30 nm, respectively. HRTEM revealed additional distinctive nanoscale structures that also shed light on the formation pathways.
Performance investigation of a pressure pulsation dampener applied in the discharge chamber of a twin screw refrigeration compressor
Publisher: Elsevier BV
Date: 2018
Transient modeling of a two-bed silica gel–water adsorption chiller
Publisher: Elsevier BV
Date: 02-2004
Segregation due to motion of front of solidification in phase change materials systems and dependence with shape and dimension factors
Publisher: Elsevier BV
Date: 2015
Experimental study on the effect of compressor frequency on the performance of a combined trans-critical CO2 system
Publisher: Elsevier BV
Date: 07-2020
Dynamic and Economic Investigation of a Solar Thermal-Driven Two-Bed Adsorption Chiller under Perth Climatic Conditions
Publisher: MDPI AG
Date: 24-02-2020
DOI: 10.3390/EN13041005
Abstract: Performance assessment of a two-bed silica gel-water adsorption refrigeration system driven by solar thermal energy is carried out under a climatic condition typical of Perth, Australia. A Fourier series is used to simulate solar radiation based on the actual data obtained from Meteonorm software, version 7.0 for Perth, Australia. Two economic methodologies, Payback Period and Life-Cycle Saving are used to evaluate the system economics and optimize the need for solar collector areas. The analysis showed that the order of Fourier series did not have a significant impact on the simulation radiation data and a three-order Fourier series was good enough to approximate the actual solar radiation. For a typical summer day, the average cooling capacity of the chiller at peak hour (13:00) is around 11 kW while the cyclic chiller system coefficient of performance (COP) and solar system COP are around 0.5 and 0.3, respectively. The economic analysis showed that the payback period for the solar adsorption system studied was about 11 years and the optimal solar collector area was around 38 m2 if a compound parabolic collector (CPC) panel was used. The study indicated that the utilization of the solar-driven adsorption cooling is economically and technically viable for weather conditions like those in Perth, Australia.
Energy and Exergy Analysis of the Air Source Transcritical CO2 Heat Pump Water Heater Using CO2-Based Mixture as Working Fluid
Publisher: MDPI AG
Date: 23-07-2021
DOI: 10.3390/EN14154470
Abstract: Given the large demand nowadays for domestic hot water, and its impact on modern building energy consumption, air source transcritical CO2 heat pumps have been extensively adopted for hot water production. Since their system efficiency is limited by significant irreversibility, a CO2-based mixture could offer a promising drop-in technology to overcome this deficiency without increasing system complexity. Although many CO2 blends have been studied in previously published literature, little has been presented about the CO2/R32 mixture. Therefore, a proposed mixture for use in transcritical CO2 heat pumps was analyzed using energy and exergy analysis. Results showed that the coefficient of performance and exergy efficiency variation displayed an “M” shape trend, and the optimal CO2/R32 mixture concentration was determined as 0.9/0.1 with regard to flammability and efficiency. The irreversibility of the throttling valve was reduced from 0.031 to 0.009 kW⋅kW−1 and the total irreversibility reduction was more notable with ambient temperature variation. A case study was also conducted to examine domestic hot water demand during the year. Pure CO2 and the proposed CO2 blend were compared with regard to annual performance factor and annual exergy efficiency, and the findings could provide guidance for practical applications in the future.
Cooling and Water Production in a Hybrid Desiccant M-Cycle Evaporative Cooling System with HDH Desalination: A Comparison of Operational Modes
Publisher: MDPI AG
Date: 16-02-2023
DOI: 10.3390/PR11020611
Abstract: In this paper, the cooling and freshwater generation performance of a novel hybrid configuration of a solid desiccant-based M-cycle cooling system (SDM) combined with a humidification–dehumidification (HDH) desalination unit is analysed and compared in three operational modes: ventilation, recirculation, and half recirculation. The HDH unit in this system recycles the moist waste air sourced from the M-cycle cooler and rotary desiccant wheel of the SDM system to enhance water production. A mathematical model was established and solved using TRNSYS and EES software. The results of this study indicate that the recirculation mode exhibited superior cooling performance compared to the other two modes, producing up to 7.91 kW of cooling load and maintaining a supply air temperature below 20.85 °C and humidity of 12.72 g/kg under various ambient conditions. All the operational modes showed similar water production rates of around 52.74 kg/h, 52.43 kg/h, and 52.14 kg/h for the recirculation, half-recirculation and ventilation modes, respectively, across a range of operating temperatures. The recirculation mode also exhibited a higher COP compared to the other modes, as the environmental temperature and relative humidity were above 35 °C and 50%. However, it should be noted that the implementation of the recirculation mode resulted in a higher water consumption rate, with a maximum value of 5.52 kg/h when the inlet air reached 45 °C, which partially offset the benefits of this mode.
Glaciothermal power generation in cold climate regions
Publisher: IEEE
Date: 07-2015
Performance improvement of supercritical carbon dioxide power cycles through its integration with bottoming heat recovery cycles and advanced heat exchanger design: A review
Publisher: Hindawi Limited
Date: 31-03-2020
DOI: 10.1002/ER.5319
Competing impacts of internal pores dissolution and external compression on the permeability evolution during the infiltration of weakly acidic fluids
Publisher: Elsevier BV
Date: 10-2023
A review of air-cooling battery thermal management systems for electric and hybrid electric vehicles
Publisher: Elsevier BV
Date: 07-2021
Research and Solution of Vibration Problem of an Air-cooled heat exchanger of Reciprocating Compressor
Publisher: IOP Publishing
Date: 09-2021
DOI: 10.1088/1757-899X/1180/1/012035
Abstract: Excessive vibration of complex structures in a multi-excitation environment is an arduous problem. Especially in a reciprocating compressor, how to quickly and accurately position the vibration sources, analyze the excitation features and take effective solutions is of great significance to the safe and stable operation of the compressor. In this paper, the problem of excessive vibration of an air-cooled heat exchanger used in a variable speed CH4 compressor was studied. The air-cooled heat exchanger is composed of tubes, tube boxes and support frame. Its vibration is evoked by complex periodic gas pulsation in the tubes. The vibration model of the heat exchanger was simplifies as a multi-freedom model with periodic excitations using the lumped parameter method. The model has advantages of clear physical concept, easy solution and high accuracy of result. In the model, the air-cooled heat exchanger was simplified as three mass blocks connected by six springs. And then, modal test of the heat exchanger was carried out on site. The vibration modes and natural frequencies of the exchanger were obtained according to the test results. After that, above mentioned multi-freedom model was further simplified as a single freedom vibration model, so that it was convenient to propose the vibration control measures. The practical application results proved that these measures were effective. This research provided a practical and fast analytical method for solutions of compressor vibration problems.
Prospective assessment of methanol vehicles in China using FANP-SWOT analysis
Publisher: Elsevier BV
Date: 09-2020
Thermal performance prediction of outdoor swimming pools
Publisher: Elsevier BV
Date: 08-2019
Geothermal air conditioning: typical applications using deep-warm and shallow-cool reservoirs for cooling in Perth, Western Australia
Publisher: EDP Sciences
Date: 2014
DOI: 10.1051/SMDO/2013010
Abstract: Geothermal heat is a sustainable form of alternative energy, commonly associated with the production of electricity along tectonic plate boundaries and in volcanically active zones. Outside of these special regions however it is rare to find a geothermal gradient high enough to achieve pay back on projects for generating electricity. On the other hand regions containing sedimentary aquifers are far more common and these aquifers frequently have a sufficiently high temperature gradient to make direct use of the thermal energy attractive. Meanwhile highly permeable aquifers occurring at shallow depths are possible sources for cooling water or can be both heat sources and sinks when used in combination with heat pumps. We provide a case study for the use of thermally driven absorption chillers on the University of Western Australia c us in Perth and discuss two ongoing projects: one for the heating and cooling of the offices of the Australian Resources Research Council using a reversible heat pump and the other the climate control of the planned Australian International Gravitational Observatory.
Development and multi-criteria optimization of a solar thermal power plant integrated with PEM electrolyzer and thermoelectric generator
Publisher: Elsevier BV
Date: 07-2022
Methane desorption and adsorption measurements on activated carbon in 281–343 K and pressures to 1.2 MPa
Publisher: Springer Science and Business Media LLC
Date: 10-12-2011
Experimental investigation on the performance of a novel single-driving integrated pump and compressor system for electronic cooling
Publisher: Elsevier BV
Date: 03-2018
A design optimization study of an air-cooling battery thermal management system for electric vehicles
Publisher: SAGE Publications
Date: 08-2022
DOI: 10.1177/09544089221116418
Abstract: Air cooling is a highly cost-effective method for the battery thermal management systems due to its simple structure, high reliability and low maintenance cost. Different from other designs of only a single inlet/outlet structure in the literature, an air-cooling battery thermal management system with multiple inlets/outlets design was proposed in this paper. The effects of inlet/outlet positions and dimensions on the air-cooling battery thermal management system performance were thoroughly evaluated and compared. The optimal inlet/outlet position and dimension were identified based on the maximum battery temperature and the temperature uniformity in the air cooling field. The results showed that the symmetrical double inlets/outlets design (Design 4) delivered the top temperature uniformity with the lowest energy consumption. During 1C discharging at 2 m/s inlet airflow, the maximum temperature and temperature difference of the Design 4 were 1.01 K and 2.24 K lower than those of the basic Design 0 in addition to a pressure difference reduction of 7.85 Pa. Based on the optimal Design 4, 0.03 m outlet width could further reduce the maximum temperature and temperature difference by 0.47 K and 0.28 K than the worst 0.05 m design. Furthermore, 52 additional simulations under different operating conditions had proven that the superb cooling performance of the optimal design during mild discharging operations (0.5–1C).
Thermal analysis and optimization on a transformer winding based on non-uniform loss distribution
Publisher: Elsevier BV
Date: 05-2023
Low cost energy-efficient preheating of battery module integrated with air cooling based on a heat spreader plate
Publisher: Elsevier BV
Date: 09-2023
Coupled effect of operation conditions and refrigerant charge on the performance of a transcritical CO2 automotive air conditioning system
Publisher: Elsevier BV
Date: 03-2021
Low-grade waste heat driven desalination technology
Publisher: EDP Sciences
Date: 2014
DOI: 10.1051/SMDO/2013007
Abstract: Low-grade heat driven multi-effect distillation (MED) desalination is a very promising environmentally friendly, low emission technology. Many countries, such as Australia, are water short and conventional desalination technology is energy intensive. If a primary fossil fuel source is used, then desalination will significantly contribute to carbon dioxide emission. Low-grade waste heat from process plants and power plants generate minimal additional carbon dioxide. This source of energy is typically abundant at a temperature around 65–90 °C, which dovetails with MED technology. In this paper, we report on a new MED technology that couples perfectly with low grade waste heat to give at least a 25% freshwater yield improvement compared with conventional MED design. Typical applications and their expected improvement will also be reported.
Numerical investigation of heat transfer mechanism in a vertical shell and tube latent heat energy storage system
Publisher: Elsevier BV
Date: 08-2015
Development of a water-injected twin-screw compressor for mechanical vapor compression desalination systems
Publisher: Elsevier BV
Date: 02-2016
Interaction of shale gas recovery and moisture transport in post two-phase flowback stage
Publisher: Elsevier BV
Date: 08-2019
Study on the torsional movement of a reed valve in a rotary compressor
Publisher: SAGE Publications
Date: 06-2018
Abstract: Torsional movement makes the motion of a reed valve very complex and unmanageable in a rotary compressor. However, there is little information on the torsional movement of the reed valve in comparison to the valve displacement and velocity in the literature. This article investigates the torsional movement of a reed valve in a rotary compressor under different operating conditions using a fluid–structure interaction model. The phenomenon of the torsional movement of the reed valve during an operating cycle in the compressor was first studied. Then, the impact process and stress between the reed and the retainer were examined as the torsional movement was considered. The effect of the key parameters (including the asymmetric shape of the discharge chamber, eccentric reed mounting, and compressor working conditions) on the valve torsional movement was evaluated. Results showed that the impact stress of the first contact between the reed and the retainer increased as the torsional movement increased. The asymmetric shape of the discharge chamber and the eccentric mounting of the reed had a large influence on the torsional movement of the reed valve, while the rotational speed of the compressor was the key factor that significantly affected the impact stress.
Cold climate energy production
Publisher: IEEE
Date: 09-2013
Pseudo-optimal discharge pressure analysis of transcritical CO2 electric vehicle heat pumps due to temperature glide
Publisher: Elsevier BV
Date: 10-2022
Experimental investigation of the effects of inclination, fin height, and perforation on the thermal performance of a longitudinal finned latent heat thermal energy storage
Publisher: Elsevier BV
Date: 07-2023
Theoretical study of two-stage water vapor compression systems
Publisher: Elsevier BV
Date: 2019
Performance Study of an Advanced Adiabatic Compressed Air Energy Storage System
Publisher: Elsevier BV
Date: 03-2017
Experimental Study of a Gas Engine-driven Heat Pump System for Space Heating and Cooling
Publisher: Ital Publication
Date: 21-10-2019
DOI: 10.28991/CEJ-2019-03091411
Abstract: In this paper, the performance of a gas engine-driven heat pump (GEHP) was experimentally studied for space heating and cooling. An experimental test facility was developed for this purpose. The effect of key parameters on system performance was investigated under both cooling and heating modes. The results showed that as the engine speed increased from 1400 to 2000 rpm, the cooling and heating capacities increased by 23% and 28.5%, respectively while the GEHP system Primary Energy Ratio (PER) decreased by 13.5% and 11.7% in the cooling and heating modes, respectively. The system PER in the cooling mode was found lower than that in the heating mode. This indicated that heat recovery from the engine cylinder and exhaust gas was very important for improving the GEHP system performance. In the heating mode, the ambient temperature and condenser water flow rate had a large effect on the system heating capacity and PER, and insignificant effect on the gas energy input. In the cooling mode, the chilled water inlet temperature showed a large effect on both cooling capacity and gas energy input while the chilled water flow rate had a large effect on cooling capacity and insignificant effect on the gas energy input.
Analytical Solution for Shale Gas Productivity of a Multiple-Fractured Horizontal Well Based on a Diffusion Model
Publisher: Springer Science and Business Media LLC
Date: 19-09-2017
A numerical study of the Hampson-type miniature Joule–Thomson cryocooler
Publisher: Elsevier BV
Date: 02-2006
Dynamic analysis of a low-temperature Adiabatic Compressed Air Energy Storage system
Publisher: Elsevier BV
Date: 12-2020
Numerical Simulations on the Front Motion of Water Permeation into Anisotropic Porous Media
Publisher: Hindawi Limited
Date: 04-03-2019
DOI: 10.1155/2019/7692490
Abstract: Water permeation into a porous medium is a common but important phenomenon in many engineering fields such as hydraulic fracturing. The water permeation front moves with time and may significantly impact the field variable evolution near the water front. Many algorithms have been developed to calculate this water front motion, but few numerical algorithms have been available to calculate the water front motion in anisotropic fluid-solid couplings with high computational efficiency. In this study, a numerical model is proposed to investigate the front motion of water permeation into an anisotropic porous medium. This model fully couples the mechanical deformation, fluid flow, and water front motion. The water front motion is calculated based on a directional Darcy’s flow in the anisotropic porous medium, and a revised formula with a correction coefficient is developed for the estimation of permeation depth. After verification with three sets of experimental data, this model is used to numerically investigate the impacts of permeability, viscosity, permeability anisotropy, and mechanical anisotropy on water front motion. Numerical results show that the proposed model can well describe the anisotropic water permeation process with reasonable accuracy. The permeation depth increases with permeability, mobility, and mechanical anisotropy but decreases with viscosity and permeability anisotropy. The correction coefficient mainly depends on porosity evolution, flow pattern, mobility, permeability anisotropy, and mechanical anisotropy.
Experimental investigations on the working performance of a sliding vane pump in the electronic direct cooling system
Publisher: Informa UK Limited
Date: 23-01-2020
Experimental study of the chimney effect in a solar hybrid double wall
Publisher: Elsevier BV
Date: 05-2015
Investigation on the real-time control of the optimal discharge pressure in a transcritical CO2 system with data-handling and neural network method
Publisher: Elsevier BV
Date: 02-2019
How Heat and Mass Recovery Strategies Impact the Performance of Adsorption Desalination Plant: Theory and Experiments
Publisher: Informa UK Limited
Date: 02-2007
Olive Pomace Requirements for Small Combustion Applications in Western Australia: Experimental and Modelling Analysis
Publisher: ETA-Florence Renewable Energies
Date: 2013
Methanol Vehicles in China: A Review from a Policy Perspective
Publisher: MDPI AG
Date: 07-06-2023
DOI: 10.3390/SU15129201
Abstract: Mature methanol vehicle technology with low exhaust emissions and economic benefits are a viable way to mitigate oil dependency and reduce greenhouse gas emissions. As a result, pilot projects for methanol vehicles have been carried out in 10 different cities in China over the last decade. They positively affect the economy and the environment, as shown by the acceptance results. This study chronologically reviewed the previous development and adopted pertinent policies determine the feasibility of deploying methanol vehicles from national to provincial levels. Based on the analysis and evaluations, the local government is suggested to make the following dynamic policy recommendations: (a) Before reaching the “carbon peak”, development strategies should be formulated according to the resource situation of each region. Priority should be given to the deployment of coal-to-methanol vehicles and bio-methanol vehicles to maximize the economy, so as to promote the construction of transmission and distribution systems, advance the manufacturing process of methanol fuel, and prepare the technology for the next stage. (b) In the second stage, the advancement of CO2-to-methanol technology should be promoted, focusing on the development of green methanol vehicles to better contribute to the “carbon neutrality”.
Thermal performance evaluation of an integrated photovoltaic thermal-phase change material system using Taguchi method
Publisher: Elsevier BV
Date: 09-2017
Comparison of heat transfer between cylindrical and conical vertical shell-and-tube latent heat thermal energy storage systems
Publisher: Elsevier BV
Date: 02-2018
Coupled hydro-thermal-mechanical analysis for cold CO2 injection into a deep saline aquifer
Publisher: National Library of Serbia
Date: 2019
Abstract: This study investigated the thermal effects of thermal stress and Joule-Thomson cooling on CO2 migration in a deep saline aquifer through a hydro-thermal-mechanical model. Firstly, the temperature variation of injected CO2 was analyzed through the coupling of two-phase flow, deformation of porous medium and heat transfer with Joule-Thomson effect. Then, the effect of capillary entry pressure on CO2 plume was numerically investigated and compared. It is found that injection temperature and Joule-Thomson effect can significantly affect the distributions of CO2 mass and temperature, particularly in the upper zone near the injection well. The reduction of capillary entry pressure accelerates the upward migration of CO2 plume and increases the CO2 lateral migration distance.
Investigation of no load diesel technology in isolated power systems
Publisher: IEEE
Date: 07-2016
Performance evaluation of a solar powered solid desiccant evaporative cooling system with different recirculation air ratios
Publisher: Elsevier BV
Date: 09-2022
Compressed air energy storage: Thermodynamic and economic review
Publisher: IEEE
Date: 07-2014
Special Issue on Thermodynamic and Exergy Analyses of Cooling, Power, and Energy Systems
Publisher: MDPI AG
Date: 02-12-2022
DOI: 10.3390/APP122312364
Abstract: Due to the energy crisis and environmental impact caused by fossil fuel energy, improving the efficiency of cooling, power, and energy systems has become one of the most important aspects of energy sectors [...]
Low grade heat driven multi-effect distillation technology
Publisher: Elsevier BV
Date: 12-2011
Performance simulation of multi-bed silica gel-water adsorption chillers
Publisher: Elsevier BV
Date: 04-2015
A modified zone model for estimating equivalent room thermal capacity
Publisher: Springer Science and Business Media LLC
Date: 24-04-2013
Investigation of the optimal intermediate water temperature in a combined r134a and transcritical CO 2 heat pump for space heating
Publisher: Elsevier BV
Date: 07-2017
Investigation on the Mass Flow Rate of a Refrigerator Compressor Based on the p–V Diagram
Publisher: MDPI AG
Date: 23-09-2020
DOI: 10.3390/APP10196650
Abstract: The refrigerant mass flow rate of a refrigerator compressor can only be measured by a mass flow meter and heat balance method. This paper focuses on the expansion and compression phase in which the compressor cylinder is closed, and proposes a measurement method of instantaneous mass flow of the refrigerator compressor. The comparison of the experimental pressure variation in the p–V diagram and the theoretical adiabatic process implied that the expansion and compression process of the refrigerator compressor approximated the adiabatic process. Based on the approximations and the experimental p–V diagram, a calculation method for refrigerant mass in the cylinder during the expansion and compression phase is proposed. Subsequently, the mass flow of the refrigerator compressor can be obtained. Furthermore, compared with experimental data and based on the method proposed in this paper, the error of the mass flow rate obtained is less than 3.13%. Based on this calculation method and the experimental p–V diagram, the influence of suction pressure on compressor performance is investigated.
Experimental Study of the Gas Engine Driven Heat Pump with Engine Heat Recovery
Publisher: Hindawi Limited
Date: 2015
DOI: 10.1155/2015/417432
Abstract: Gas engine driven heat pumps (GEHPs) represent one of practical solutions to effectively utilize fossil fuel energy and reduce environmental pollution. In this paper, the performance characteristics of the GEHP were investigated experimentally with engine heat recovery. A GEHP test facility was set up for this purpose. The effects of several important factors including engine speed, ambient temperature, condenser water flow rate, and condenser water inlet temperature on the system performance were studied over a wide range of operating conditions. The results showed that the engine waste heat accounted for about 40–50% of the total heat capacity over the studied operating conditions. It also showed that engine speed and ambient temperature had significant effects on the GEHP performance. The coefficient of performance (COP) and the primary energy ratio (PER) decreased by 14% and 12%, respectively, as engine speed increased from 1400 rpm to 2000 rpm. On the other hand, the COP and PER of the system increased by 22% and 16%, respectively, with the ambient temperature increasing from 3 to 12°C. Furthermore, it was demonstrated that the condenser water flow rate and condenser water inlet temperature had little influence on the COP of the heat pump and the PER of the GEHP system.
Performance Study of a Four-Bed Silica Gel-Water Adsorption Chiller with the Passive Heat Recovery Scheme
Publisher: Hindawi Limited
Date: 2015
DOI: 10.1155/2015/634347
Abstract: Adsorption chiller technology is one of the effective means to convert waste thermal energy into effective cooling, which substantially improves energy efficiency and lowers environmental pollution. This paper uses an improved lump-parameter design model to theoretically and experimentally evaluate the efficacy of the passive heat recovery scheme as applied to a four-bed adsorption chiller. Results show that the model can accurately track the experimental temporal system outlet temperatures. The performance predictions from this model compare favourably with experimental results. At rated temperature conditions and over a wide range of cycle times, both the cooling capacity and COP can be predicted to within 12.5%. The analyses indicate that the model can be used confidently as a design tool for a four-bed adsorption chiller and the passive heat recovery scheme can effectively improve the system performance.
Supply-Side Flexibility for Improved Hosting Capacity of Inverter-Based Generation Technologies: Approaches to integrating isolated power systems
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2022
Investigation on the adaptivity of the transcritical CO 2 refrigeration system with a capillary
Publisher: Elsevier BV
Date: 07-2017
Performance study of a twin-screw expander used in a geothermal organic Rankine cycle power generator
Publisher: Elsevier BV
Date: 10-2015
Predicting isosteric heats for gas adsorption
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2CP41756A
Abstract: A method for predicting the isosteric heat of gas adsorption on solid materials is developed which requires the measurement of a single isotherm - where previous methods, such as the Clausius-Clapeyron approach, require either multiple isotherms or complex calorimetric measurement. The Tóth potential function, stemming from the Polanyi potential function, is evaluated using the Langmuir and Tóth isotherm equations to generate new equations for the isosteric heat. These new isosteric heat equations share common parameters with the isotherm equations and are determined from isotherm fitting. This method is demonstrated in the literature for gas adsorption onto solid adsorbates including zeolites of various surface charge character and non-porous rutile phase titanium dioxide. Predictions are made using the new isosteric heat equations and then compared to calorimetric data.
A High-Performance Vortex Adjustment Design for an Air-Cooling Battery Thermal Management System in Electric Vehicles
Publisher: MDPI AG
Date: 30-03-2023
Abstract: To boost the performance of the air-cooling battery thermal management system, this study designed a novel vortex adjustment structure for the conventional air-cooling battery pack used in electric vehicles. T-shape vortex generating columns were proposed to be added between the battery cells in the battery pack. This structure could effectively change the aerodynamic patterns and thermodynamic properties of the battery pack, including turbulent eddy frequency, turbulent kinetic energy, and average Reynolds number, etc. The modified aerodynamic patterns and thermodynamic properties increased the heat transfer coefficient with little increase in energy consumption and almost no additional cost. Different designs were also evaluated and optimized under different working conditions. The results showed that the cooling performance of the Design 1 improved at both low and high air flow rates. At a small flow rate of 11.88 L/s, the Tmax and ΔT of Design 1 are 0.85 K and 0.49 K lower than the conventional design with an increase in pressure drop of 0.78 Pa. At a relative high flow rate of 47.52 L/s, the Tmax and ΔT of the Design 1 are also 0.46 K and 0.13 K lower than the conventional design with a slight increase in pressure drop of 17.88 Pa. These results demonstrated that the proposed vortex generating design can improve the cooling performance of the battery pack, which provides a guideline for the design and optimization of the high-performance air-cooling battery thermal management systems in electric vehicles.
Thermodynamic analysis and optimization of a partial evaporating dual-pressure organic rankine cycle system for low-grade heat recovery
Publisher: Elsevier BV
Date: 02-2021
Parametric study and optimization of a full-scale converter transformer winding
Publisher: Elsevier BV
Date: 12-2021
Frequency control within high renewable penetration hybrid systems adopting low load diesel methodologies
Publisher: Elsevier BV
Date: 02-2019
Two bed silica gel–water adsorption chillers: An effectual lumped parameter model
Publisher: Elsevier BV
Date: 12-2007
Theoretical and Experimental Analysis of Engine Performance and Emissions Fuelled with Jojoba Biodiesel
Publisher: MDPI AG
Date: 28-08-2022
DOI: 10.3390/EN15176282
Abstract: Over many decades, isolated regions (e.g., islands, rural and remote areas) have heavily relied on diesel engine for producing power and energy. However, due to depleting fossil fuels and concerning emissions, biodiesels could be the substitute for diesel in power generation sectors. This study developed a single-zone thermodynamic model to predict the engine performances such as brake power (BP), torque, brake thermal efficiency (BTE), brake-specific fuel consumption (BSFC) and ignition delay (ID) times for diesel and jojoba biodiesel. The experiments were conducted on a fully automated, 4-cylinder, 4-stroke, liquid-cooled direct injection 3.7-L diesel engine fueled with diesel (D100) and three jojoba blends (JB5, JB10, and JB20) to validate the model. The performance simulation results agreed with experimental data for all tested fuels at 1200 to 2400 rpm speed and 25%, 50%, 75%, and 100% loading operation. The minimum error (3.7%) was observed for BP for D100 at 2000 rpm and 100% load, and the maximum error (19.2%) was found for JB10 at 1200 rpm and 25% loading operation. As load increases from 25 to 100%, the BSFC and torque difference between diesel and JB20 decreases from 10 to 6.5 and 9 to 6%, respectively. A shorter ID time was observed in JB5 compared to JB10 and JB20. Furthermore, a significant reduction was observed in CO (7.55%) and HC (6.65%) emission for JB20 at 25% and 1200 rpm compared to diesel fuel however, NOx emission was increased up to 10.25% under any given conditions.
New pool boiling data for water with copper-foam metal at sub-atmospheric pressures: Experiments and correlation
Publisher: Elsevier BV
Date: 08-2006
Performance analysis of an integrated adsorption and absorption refrigeration system
Publisher: Elsevier BV
Date: 09-2020
Interaction analysis and multi-response optimization of transformer winding design parameters
Publisher: Elsevier BV
Date: 10-2022
Economic Rationalization of Energy Storage under Low Load Diesel Application
Publisher: Elsevier BV
Date: 03-2017
Experimental analysis of an air-source transcritical CO2 heat pump water heater using the hot gas bypass defrosting method
Publisher: Elsevier BV
Date: 11-0011
Experimental investigation of silica gel–water adsorption chillers with and without a passive heat recovery scheme
Publisher: Elsevier BV
Date: 08-2005
Noise control of a twin-screw refrigeration compressor
Publisher: Elsevier BV
Date: 04-2021
Numerical study of intake flow field inside the high-speed refrigeration scroll compressor with spiral suction channels in the motor rotor
Publisher: IOP Publishing
Date: 09-2021
DOI: 10.1088/1757-899X/1180/1/012012
Abstract: To control the temperature of the electric motor, the suction gas is introduced flowing through the motor in hermetic scroll compressors. For high-speed compressors, this flow resistance is high, which results in decreasing of the efficiency. In this paper, spiral flow channels were designed inside the motor rotor to decrease the suction flow resistance and increase the refrigerant flow rate inside the scroll compressor. Simulation of the suction flow through the motor was carried out. Two structure of straight and spiral intake channels were brought into the simulation model, under 3000 rpm, 5000 rpm, 7000 rpm and 9000 rpm. The results showed that the spiral channels could increase the refrigerant flow rate inside the motor rotor and the suction pressure of the compressor, and with the increase of the motor speed, the effect of the intake supercharging improved. At 9000 rpm, the suction pressure at the suction port of the compressor increased by about 4% by using spiral channels, while the mass flow rate increased by about 6%. The increases of total refrigerant flow rate in spiral channels are mainly due to the increase in unblocked channels. The size and the layout of the balance weight have a great effect on intake flow.
Carbon nanofibres from fructose using a light-driven high-temperature spinning disc processor
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CC47354F
Abstract: A high flux bright light-driven high temperature spinning disc processor affords carbon nanofibres within minutes and with controlled length.
A comparative life cycle impact assessment for solar heat integration in post-combustion carbon capture
Publisher: Elsevier BV
Date: 12-2023
Research on efficient defrosting control logic for transcritical CO2 electric vehicle heat pump air-conditioning system
Publisher: Elsevier BV
Date: 12-2062
Numerical performances of invariable and moving boundary methods during fluid penetration into anisotropic porous media
Publisher: Elsevier BV
Date: 05-2020
A novel CO2 thermal management system with battery two-phase (evaporative) cooling for electric vehicles
Publisher: Elsevier BV
Date: 12-2022
High penetration renewable generation within Australian isolated and remote power systems
Publisher: Elsevier BV
Date: 02-2019
Numerical and experimental investigations of electronic evaporative cooling performance with a coiled channel
Publisher: Elsevier BV
Date: 02-2016
Numerical investigation on screw rotor deformation and influence on volumetric efficiency of the twin-screw multiphase pump
Publisher: Elsevier BV
Date: 2017
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