ORCID Profile
0000-0002-4675-3927
Current Organisations
Universiti Kebangsaan Malaysia
,
Universiti Teknologi PETRONAS
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Publisher: Elsevier BV
Date: 02-2015
Publisher: Elsevier BV
Date: 02-2019
Publisher: Elsevier BV
Date: 10-2005
Publisher: Elsevier BV
Date: 04-2006
Publisher: Hindawi Limited
Date: 2018
DOI: 10.1155/2018/1469385
Abstract: Previous works revealed that cross-corrugated absorber plate design and jet impingement on a flat absorber plate resulted in a significant increase in the performance of a solar air heater (SAH). Involving these two designs into one continuous design to improve the SAH performance remains absent in the literature. This study aimed to evaluate the achieved enhancement on performance parameters of a SAH with jet impingement on a corrugated absorber plate. An energy balance model was developed to compare the performance parameters of the proposed SAH with the other two SAHs. At a clear sky day and a mass flow rate of 0.04 kg/s, the hourly results revealed that the max fluid outlet temperatures for the proposed SAH, jet-to-flat plate SAH, and cross-corrugated plate SAH are 321, 317, and 313 K, respectively the max absorber plate temperatures are 323.5, 326.5, and 328 K, respectively the maximum temperature differences between the absorber plate and fluid outlet are ~3, 9, and 15 K, respectively the max efficiencies are 65.7, 64.8, and 60%, respectively. Statistical t -test results confirmed significant differences between the mean efficiency of the proposed SAH and SAH with jet-to-flat plate. Hence, the proposed design is considered superior in improving the performance parameters of SAH compared to other designs.
Publisher: Elsevier BV
Date: 04-2006
Publisher: Institute of Research and Community Services Diponegoro University (LPPM UNDIP)
Date: 30-06-2023
DOI: 10.14710/IJRED.2023.54348
Abstract: As the world shifts towards a more sustainable future, solar energy has emerged as a preeminent and economically feasible alternative to traditional energy sources, gaining widespread adoption. This study presents a reversed circular flow jet impingement (RCFJI) which aims to improve the performance of a bifacial PVT collector. An indoor experiment using a solar simulator to assess the energy, exergy, and economic efficiency of a RCFJI bifacial PVT collector. The study was carried out using a solar irradiance ranging from 500-900W/m2 and a mass flow rate between 0.01-0.14 kg/s. Energy performance-wise, the highest photovoltaic efficiency achieved was 11.38% at solar irradiance of 500 W/m2, while the highest thermal efficiency achieved was 61.4% under 900 W/m2, both obtained at 0.14 kg/s mass flow rate. Regarding exergy performance, the highest photovoltaic exergy obtained was 47.27 W under 900 W/m2 at 0.14 kg/s, while the highest thermal exergy was 9.67 W at 900 W/m2 at 0.01 kg/s. Overall, higher solar irradiance is more desirable for energy and exergy performance. Meanwhile, economic point of view, lower solar irradiance is preferable. Based on the findings, the optimal mass flow rate was 0.06 kg/s.
Publisher: Elsevier BV
Date: 1999
Publisher: Elsevier BV
Date: 2015
Publisher: American Scientific Publishers
Date: 11-2015
Abstract: In this study, tin doped zinc oxide (ZnO:Sn) nano-structured thin films were successfully deposited by co-sputtering of ZnO and Sn on top of glass substrate. The effect of Sn doping on the microstructure, phase, morphology, optical and electrical properties of the films were extensively investigated by means of XRD, EDX, SEM, AFM, Hall Effect measurement, and UV-Vis spectrometry. The results showed that the undoped ZnO film exhibited preferred orientation along the c-axis of the hexagonal wurtzite structure. With increase of Sn doping, the peak position of the (002) plane was shifted to the higher 20 values, and ultimately changed to amorphous structure. The absorption edge was shifted to blue region which confirmed the excitonic quantum confinement effect in the films. Consequently, improved surface morphology with optical bandgap, reduced average particle size, reduced resistivity, enhanced Hall mobility and carrier concentration were observed in the doped films after vacuum annealing. Among all of the as-deposited and annealed ZnO:Sn films investigated in this study, annealed film doped with 8 at.% of Sn concentration exhibited the best properties with a bandgap of 3.84 eV, RMS roughness of 2.51 nm, resistivity of 2.36 ohm-cm, and Hall mobility of 83 cm2 V(-1) s(-1).
Publisher: IEEE
Date: 12-2015
Publisher: Elsevier BV
Date: 03-2015
Publisher: Elsevier BV
Date: 12-1999
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CS00469H
Abstract: This review considers defect chemistry of TiO 2 and defect-related properties associated with solar energy conversion.
Publisher: Oxford University Press (OUP)
Date: 06-2009
DOI: 10.1093/IJLCT/CTP016
Publisher: Elsevier BV
Date: 08-2009
Publisher: IEEE
Date: 08-2015
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2007
Publisher: IEEE
Date: 08-2015
Publisher: IEEE
Date: 09-2014
Publisher: Elsevier BV
Date: 04-2019
Publisher: Elsevier BV
Date: 03-2015
Publisher: Elsevier BV
Date: 11-2010
Publisher: American Scientific Publishers
Date: 11-2015
Abstract: Metal-semiconductor (MS) junction between Mo and CdTe, which is one of the fundamental issues for CdTe based solar cell, has been investigated for films deposited on different substrates. XRD pattern of Mo/CdTe films on the polyimide (PI) substrate shows a strong preferential orientation of MoTe2 in (100) at 2θ = 29.44 degrees, which becomes less apparent as deposition time of CdTe increases. However, on soda lime glass (SLG) no such XRD reflection pattern is observed. Moreover, from EDX measurement, Mo-Te compound also identifies MoTe2 at Mo/CdTe interface on PI substrate, which is not present on SLG. Bulk carrier concentration of Mo/CdTe films on PI substrate for lower deposition time of CdTe is found 1.42 x 10(18) cm(-3), which is almost equal to MoTe2. Thereafter, it decreases as CdTe growth time increases. The type of unintentionally formed MoTe2 on PI substrate is found to be n-type in nature. Lattice constants of a = 6.5 Å for CdTe and a = 3.52 Å for MoTe2 are found from nanostructure study by TEM.
Publisher: Elsevier BV
Date: 08-2009
Publisher: Elsevier BV
Date: 02-2011
Publisher: Science Publications
Date: 06-2009
Publisher: Elsevier BV
Date: 07-2013
Publisher: IEEE
Date: 12-2015
No related grants have been discovered for Kamaruzzaman Sopian.