Technical note Comparative study on the thermalperformances of solar air heater collectors with selectiveand nonselective absorber-plate

A. Hachemi

Renewable Energy, 1999, vol. 17, issue 1, 103-112

Abstract: The use of a selective absorber in a solar air collector permits the lowering of theforward heat loss by radiation to the environment. This technique improves the thermal heatperformance of the collector, but it raises the cost price of the installation. To increaseperformance, it is essential to reduce the absorber temperature and in consequence the forwardheat loss. To this effect, using finned systems, a fully developed turbulent flow is created, thatcools the absorber and raises the air temperature. That remedies the low thermophysicalproperties of the air and at the same time shows that the use of any black-painted plate, as anonselective absorber, permits the attainment of high thermal efficiencies with low cost.

Date: 1999
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:17:y:1999:i:1:p:103-112

DOI: 10.1016/S0960-1481(98)00021-4

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