Time dependent stratified flows in a differentially heated cavity under realistic conditions. Flows driven by the application of a horizontal temperature gradient has applications in nature and engineering. Although much progress has been made in the analysis of the case of a sudden application of temperature differences to the vertical walls of a container with insulating horizontal walls containing an isothermal fluid, the reality is that neither the insulated walls nor the initially isotherma ....Time dependent stratified flows in a differentially heated cavity under realistic conditions. Flows driven by the application of a horizontal temperature gradient has applications in nature and engineering. Although much progress has been made in the analysis of the case of a sudden application of temperature differences to the vertical walls of a container with insulating horizontal walls containing an isothermal fluid, the reality is that neither the insulated walls nor the initially isothermal fluid can be achieved. This project will, by analytical, numerical and experimental methods, make a preliminary investigation of the influence of conducting horizontal walls and an initially stratified fluid.Read moreRead less
Design and Optimisation of Novel Enthalpy Heat Exchangers. This project deals with the thermal design and optimisation of a novel type of latent energy heat exchanger. This new heat exchanger overcomes the practical implementation problems of previous latent energy heat exchangers such as heat-wheels. The main application of this innovative heat exchanger will be to improve the capacity and efficiency of air conditioning systems. As the new heat exchanger is very compact it will be ideally sui ....Design and Optimisation of Novel Enthalpy Heat Exchangers. This project deals with the thermal design and optimisation of a novel type of latent energy heat exchanger. This new heat exchanger overcomes the practical implementation problems of previous latent energy heat exchangers such as heat-wheels. The main application of this innovative heat exchanger will be to improve the capacity and efficiency of air conditioning systems. As the new heat exchanger is very compact it will be ideally suited for integration with air conditioning coils. Existing latent heat wheels are very bulky and are difficult to integrate into standard air conditioner installations.Read moreRead less
The use of numerical and experimental techniques to develop energy efficient open refrigerated display cabinets. This project will provide knowledge for Australian industry to develop new energy efficient refrigerated display cabinets, putting Australia in the forefront of commercial refrigeration display cabinet technologies. This will have a significant impact on sustainability of our environment and will assist Australia to meet present and future international climate obligations by contrib ....The use of numerical and experimental techniques to develop energy efficient open refrigerated display cabinets. This project will provide knowledge for Australian industry to develop new energy efficient refrigerated display cabinets, putting Australia in the forefront of commercial refrigeration display cabinet technologies. This will have a significant impact on sustainability of our environment and will assist Australia to meet present and future international climate obligations by contributing to the reduction of greenhouse emissions. The Government has already introduced new MEPS levels, and are planning to increase these to more stringent levels in 2007. The development of the techniques proposed in this application will be essential for manufacturers if they are to economically meet these MEPS level requirements. Read moreRead less
Heat Transfer Enhancement Techniques for Air Conditioning and Refrigeration Equipment. The proposed Project will make significant contribution towards the both fundamental understanding of heat transfer enhancement using dimpled surfaces and the design of heat exchangers and, in particular to the application of dimpled surfaces in air conditioning and refrigeration industries. Unlike the previous CFD studies which have been made on the assumptions that the flow is steady and decoupled from the ....Heat Transfer Enhancement Techniques for Air Conditioning and Refrigeration Equipment. The proposed Project will make significant contribution towards the both fundamental understanding of heat transfer enhancement using dimpled surfaces and the design of heat exchangers and, in particular to the application of dimpled surfaces in air conditioning and refrigeration industries. Unlike the previous CFD studies which have been made on the assumptions that the flow is steady and decoupled from the heat transfer calculations in this Project the fully coupled problem will be solved, in which unsteady flows are allowed to occur over a dimpled surfaces. As a result we will be able to more accurately determine the resultant effects on the pressure drop and heat transfer. Read moreRead less
Enhancing natural convection heat transfer using a single horizontal non-metallic fin. This project will develop the basis for a simple design to improve the energy efficiency of natural convection heat exchangers. Heat exchangers are widely adopted in many electronic devices and industrial processes as they require no external power input, additional space, and are quiet, reliable and economical. The research will exploit the interaction between two flows to trigger turbulence, and will result ....Enhancing natural convection heat transfer using a single horizontal non-metallic fin. This project will develop the basis for a simple design to improve the energy efficiency of natural convection heat exchangers. Heat exchangers are widely adopted in many electronic devices and industrial processes as they require no external power input, additional space, and are quiet, reliable and economical. The research will exploit the interaction between two flows to trigger turbulence, and will result in an increase of the overall capacity and performance of engineering systems. This will contribute significantly to reductions in power consumption and improvements in productivity and work environment, leading ultimately to reductions in greenhouse gas emissions and to economic benefits.Read moreRead less
Investigation of a Novel Fan. Fans are very widely used for cooling and heating, thrust and mass transport and are one of the most common fluid mechanical devices. An optimal fan design will maximise flow velocity and pressure rise for minimum energy requirements and noise production. De Rolfe has recently developed a new fan that shows considerable promise in comparison to conventional designs on single point tests.
In this project experimental and computional fluid dynamics investigations o ....Investigation of a Novel Fan. Fans are very widely used for cooling and heating, thrust and mass transport and are one of the most common fluid mechanical devices. An optimal fan design will maximise flow velocity and pressure rise for minimum energy requirements and noise production. De Rolfe has recently developed a new fan that shows considerable promise in comparison to conventional designs on single point tests.
In this project experimental and computional fluid dynamics investigations of the new fan will be carried out to determine the basic fluid mechanics and to obtain performance curves. Scaling laws will be obtained and, if possible, the fan will be further optimised.Read moreRead less
Thermal enhancement strategies and development of a high-performance micro-scale heat exchanger for thermoelectric refrigeration with large cooling loads. Traditional refrigeration essentially utilises CFC-refrigerants which are potent atmospheric pollutants causing widespread ecological damage. Devoid of such adversities, electronic heat pumping mechanism of thermoelectric principle offers a practical ?CFC-free? alternative for conventional cooling methods. While the current thermoelectric te ....Thermal enhancement strategies and development of a high-performance micro-scale heat exchanger for thermoelectric refrigeration with large cooling loads. Traditional refrigeration essentially utilises CFC-refrigerants which are potent atmospheric pollutants causing widespread ecological damage. Devoid of such adversities, electronic heat pumping mechanism of thermoelectric principle offers a practical ?CFC-free? alternative for conventional cooling methods. While the current thermoelectric technology adequately meets light cooling demand, its potential for heavy-duty refrigeration is critically undermined by ill-developed methods for dissipating heat from thermoelectric modules to coolants, and remains grossly under-utilised. The proposed work will devise novel heat transfer techniques for raising thermoelectric cooling thresholds to suit large heat loads and develop a thermally enhanced micro-scale heat exchanger for application in commercial thermoelectric refrigeration.Read moreRead less
Design tools for optimising data centre layout to minimise energy usage. Data centres are major consumers of energy worldwide, mainly through the need to cool the equipment. It has become imperative to develop the science for reducing this consumption. Rising computing demand, increasing power density, and increasing infrastructure and energy costs are major issue for data centres around the world. Our research will provide a powerful alternative to conventional thermal management techniques for ....Design tools for optimising data centre layout to minimise energy usage. Data centres are major consumers of energy worldwide, mainly through the need to cool the equipment. It has become imperative to develop the science for reducing this consumption. Rising computing demand, increasing power density, and increasing infrastructure and energy costs are major issue for data centres around the world. Our research will provide a powerful alternative to conventional thermal management techniques for cooling high-density heat loads in mixed-density environments. We will address the key issue of energy minimisation through a detailed flow analyses by the use of numerical simulations and optimisation algorithms.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0238345
Funder
Australian Research Council
Funding Amount
$373,000.00
Summary
Advanced Laser Diagnostics in Dilute Heterogeneous Combustion. This proposal seeks to establish a state-of-the-art laser diagnostics facility with unique capabilities for non-intrusive measurements in dilute multi-phase flows. Such heterogeneous flows which involve stationary surfaces, disperse suspended droplets or suspended particles are found in many applications including engines, furnaces, industrial and chemical processing and micro-combustion devices. This facility will give Australian re ....Advanced Laser Diagnostics in Dilute Heterogeneous Combustion. This proposal seeks to establish a state-of-the-art laser diagnostics facility with unique capabilities for non-intrusive measurements in dilute multi-phase flows. Such heterogeneous flows which involve stationary surfaces, disperse suspended droplets or suspended particles are found in many applications including engines, furnaces, industrial and chemical processing and micro-combustion devices. This facility will give Australian researchers the unprecedented opportunity to perform measurements of flow, mixing, temperature and composition fields in the gas and liquid or solid phases simultaneously. The resulting data will advance current knowledge in these complex flows and lead to new and improved reactor designs.
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Quantification of heat release, NOx emissions and soot from high temperature gaseous flames. The ongoing importance of Australia's minerals processing sector depends on advanced combustion technology to minimise the emission of NOx and other greenhouse gases. The heat release and NOx emissions from the high temperature flames used in such processes is known to depend strongly on the presence of soot. However their optimisation and design is limited by a lack of fundamental data under relevant c ....Quantification of heat release, NOx emissions and soot from high temperature gaseous flames. The ongoing importance of Australia's minerals processing sector depends on advanced combustion technology to minimise the emission of NOx and other greenhouse gases. The heat release and NOx emissions from the high temperature flames used in such processes is known to depend strongly on the presence of soot. However their optimisation and design is limited by a lack of fundamental data under relevant conditions. To address this need, new measurements and analysis will be performed to quantify the complex relationship between turbulent mixing, soot formation, heat release and NOx emissions under high temperature conditions of both fundamental and practical significance.
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