Single and double pass solar air heaters with wire mesh as packing bed

The thermal performances of single and double pass solar air heaters with steel wire mesh layers are used instead of a flat absorber plate are investigated experimentally. The effects of mass flow rate of air on the outlet temperature and thermal efficiency were studied. The results indicate that th...

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Bibliographic Details
Published in:Energy (Oxford) 2010-09, Vol.35 (9), p.3783-3787
Main Authors: Aldabbagh, L.B.Y., Egelioglu, F., Ilkan, M.
Format: Article
Language:English
Subjects:
Accumulators
Air heaters
Applied sciences
Collectors
Energy
Equipments, installations and applications
Exact sciences and technology
Flow rate
Mass flow rate
Natural energy
Outlets
Single and double pass solar air heater
Solar air heater
Solar energy
Solar thermal conversion
Thermal efficiency
Wire mesh
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Summary:The thermal performances of single and double pass solar air heaters with steel wire mesh layers are used instead of a flat absorber plate are investigated experimentally. The effects of mass flow rate of air on the outlet temperature and thermal efficiency were studied. The results indicate that the efficiency increases with increasing the mass flow rate for the range of the flow rate used in this work between 0.012 and 0.038 kg/s. For the same flow rate, the efficiency of the double pass is found to be higher than the single pass by 34–45%. Moreover, the maximum efficiencies obtained for the single and the double pass air collectors are 45.93 and 83.65% respectively for the mass flow rate of 0.038 kg/s. Comparison of the results of a packed bed collector with those of a conventional collector shows a substantial enhancement in the thermal efficiency.
ISSN:0360-5442
DOI:10.1016/j.energy.2010.05.028