Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Experimental Study on the Thermal Performance of a Domestic Solar Air Heater with Protruding Triangular Openings on the Absorber Plate

흡열판에 돌출형 삼각 개구부가 설치된 가정용 태양열 공기가열기의 열성능에 대한 실험적 연구

  • Kim, Hyun Gon (Department of Aerospace and Mechanical Engineering, Graduate school, Korea Aerospace University) ;
  • Boo, Joon Hong (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • 김현곤 (한국항공대학교 항공우주 및 기계공학과) ;
  • 부준홍 (한국항공대학교 항공우주 및 기계공학부)
  • Received : 2016.01.31
  • Accepted : 2016.04.21
  • Published : 2016.04.30
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Abstract

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 $18^{\circ}C$ for $90-m^3/h$ flow rate when the absorber plate was inclined by $45^{\circ}$ for a clear-day solar irradiation of about $906W/m^2$. 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.

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References

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