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Experimental Study on the Thermal Performance of a Domestic Solar Air Heater with Protruding Triangular Openings on the Absorber Plate
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 Title & Authors
Experimental Study on the Thermal Performance of a Domestic Solar Air Heater with Protruding Triangular Openings on the Absorber Plate
Kim, Hyun Gon; Boo, Joon Hong;
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A solar air heater was designed for supplementary domestic heating. The absorber plate had a series of protruding notches which had triangular openings on the front surface of the absorber plate to direct partial air flow to the rear surface and to enhance the convective heat transfer to the flowing air. The height of the opening as well as the opening configuration was determined by preceding numerical simulations. The experimental model had an absorber plate of 0.78-m width and 1.0-m length which was coated with black paint. The air temperature increased as much as for flow rate when the absorber plate was inclined by for a clear-day solar irradiation of about . The collector efficiency ranged from 69 to 74%. Considering the simplicity of the structure and low manufacturing cost, the solar air heater might have competence as an auxiliary heating device for domestic use. On-site experimental results are presented with discussion for various solar irradiations and air flow conditions.
Solar air heater;Absorber plate;Protruding openings;Selective solar coating;Temperature rise;Collection efficiency;
 Cited by
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