Experimental investigation of impact of the energy storage medium on the thermal performance of double pass solar air heater
Kumar R. Gaurav Kumar S. Afzal A. Muthu Manokar A. Sharifpur M. Issakhov A.
December 2021Elsevier Ltd
Sustainable Energy Technologies and Assessments
2021#48
In this research work, a solar air heater with double pass (SAHD) configuration having different porous mediums on its absorber plate is experimentally investigated. The stone pebbles, mild steel and aluminium chips have been used as porous mediums to augment the convective heat transfer (CHT) from plate to the air flowing in channel of SAHD. The experiment is conducted with these three materials at different mass flow rates (MFR) altering from 0.005 to 0.03 kg/s and at distinct solar intensities. The thermal efficiency (ηth) and thermohydraulic efficiency (ηthe) of SAHD with three porous materials are computed at different MFR to analyse their impact on thermal performance. Findings reveal that SAHD with the porous medium on the absorber plate have higher heat transfer, thermal efficiency and thermohydraulic efficiency as compared to SAHD without porous medium. Out of the three materials used in experimentation, aluminium is found to have maximum influence on the performance of SAHD. The highest enhancement in heat transfer, ηth and ηthe are achieved with aluminium chips as a porous medium. The maximum enhancements in ηth and ηthe obtained are 84% and 74% respectively. The highest ηthe is attained at MFR of 0.025 kg/s for aluminium chips. The present study concludes that SAHD configuration with the porous medium in its 2nd passage is an efficient design for heat transfer improvement.
Double pass solar air heater , Heat transfer , Porous material , Thermal efficiency , Thermal hydraulic performance
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Faculty of Engineering and Technology, Shoolini University, Solan, 173229, HP, India
Department of Physics and Electronics, Hansraj College, University of Delhi, India
Department of Mechanical Engineering, P. A. College of Engineering (Affiliated to Visvesvaraya Technological University, Belagavi), Mangaluru, 574153, India
Department of Mechanical Engineering, School of Technology, Glocal University, Delhi-Yamunotri Marg, SH-57, Mirzapur Pole, Saharanpur District, 247121, Uttar Pradesh, India
Department of Mechanical Engineering, B. S. Abdur Rahman Crescent Institute of Science and Technology, Vandalur, 600 048, Tamil Nadu, India
Clean Energy Research Group, Department of Mechanical and Aeronautical Engineering, University of Pretoria, Hatfield, Pretoria, South Africa
Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, 404, Taiwan
Faculty of Mechanics and Mathematics, Department of Mathematical and Computer Modelling, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Faculty of Engineering and Technology
Department of Physics and Electronics
Department of Mechanical Engineering
Department of Mechanical Engineering
Department of Mechanical Engineering
Clean Energy Research Group
Department of Medical Research
Faculty of Mechanics and Mathematics
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