흡열판에 돌출형 삼각 개구부가 설치된 가정용 태양열 공기가열기의 열성능에 대한 실험적 연구
Experimental Study on the Thermal Performance of a Domestic Solar Air Heater with Protruding Triangular Openings on the Absorber Plate
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초록
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℃ for 90-m3/h flow rate when the absorber plate was inclined by 45° for a clear-day solar irradiation of about 906 W/m2. 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.
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℃ for 90-m3/h flow rate when the absorber plate was inclined by 45° for a clear-day solar irradiation of about 906 W/m2. 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.
참고문헌 (15)
- 신재혁, "태양열 공기가열기의 흡열판 홀 배치와 형상에 따른 열적 성능에 관한 수치해석적 연구", 한국태양에너지학회 논문집, 35(1), pp.69~80 (2015), 한국태양에너지학회
- Mohamad, A. A., "High efficiency solar air heater", Solar Energy, 60, pp.71~76 (1997)
- Gill, R. S., "Low cost solar air heater", Energy Conversion and Management, 57, pp.131~142 (2012)
- Sethi, M., "Correlations for solar air heater duct with dimpled shape roughness elements on absorber plate", Solar Energy, 86(9), pp.2852~2861 (2012)
- Lanjewar, A., "Heat transfer and friction in solar air heater duct with W-shaped rib roughness on absorber plate", Energy, 36, pp.4531~4541 (2011)
- Sharma, S. K., "Thermohydraulic performance analysis of solar air heaters having artificial roughness–A review", Renewable and Sustainable Energy Reviews, 41, pp.413~435 (2015)
- 김종열, "태양열 이용 난방용 공기가열기 개발을 위한 기초 운전 특성", 한국태양에너지학회 논문집, 31(4), pp.86~93 (2011), 한국태양에너지학회
- White paper on solar air heating collectors, IEA-SHC Task 43 – Solar rating and certification procedure, "Kramer, K. S.", 18~22 (2013)
- Duffie, J. A., "Solar engineering of thermal processes", pp.282~301 (2006), John Wiley & Sons, Inc
- Cengel, Y. A., "Thermodynamics:an engineering approach", pp.949~ (2011), McGraw-Hill
- Holman, J.P, "Experimental Methods for Engineers", pp.49~56 (1994), McGraw-Hill
- Peng, D., "Performance study of a novel solar air collector", Applied Thermal Energy, 30, pp.2594~2601 (2011)
- El-khawajah, M. F., "The effect of using transverse fins on a double pass flow solar air heater using wire mesh as an absorber", Solar Energy, 85, pp.1479~1487 (2011)
- Ozgen, F., "Experimental investigation of thermal performance of a double-flow solar air heater having aluminium cans", Renewable Energy, 34, pp.2391~2398 (2009)