Comparison of the Energy Performance between Flat-plate and Heat Pipe Evacuated Tube Collectors for Solar Water Heating Systems under Mediterranean Climate Conditions

Journal of Sustainable Development of Energy, Water and Environment Systems

Andonaq Londo¹  Altin Maraj¹  Alemayehu Gebremedhin²  Coskun Firat³ 

[1] Department of Energy, Polytechnic University of Tirana, Sheshi Nënë Tereza, 1019 Tirana, Albania;Department of Manufacturing and Civil Engineering, Norwegian University of Science and Technology, Teknologivegen 22, 2802 Gjøvik, Norway;Energy Institute, Technical University of Istanbul, Maslak, Sarıyer, 34469 Istanbul, Turkey;

关键词: Flat-plate collector;    Evacuated tube collector;    Heat pipe;    Useful energy gain;    Losses;    Collector efficiency.;   

DOI  :  10.13044/j.sdewes.d6.0228

来源: DOAJ

【 摘 要 】

In this paper, the energy performance of a flat-plate collector and a heat pipe evacuated tube collector exploited for domestic hot water production in the Mediterranean climate is compared. For this purpose, yearly data obtained from two field-trial solar waterheating systems are used. The selected systems are with forced circulation and installed near each other. The studied solar collectors are installed on the roof with the same slope angle of 45° and the surface azimuthal angle of 10°. The installed surface area of theflat-plate solar collector is 4.41 m2, whereas for the heat pipe evacuated tube collector is 1.5 m2. The annual irradiation on solar collector plane was 1,456 kWh/m2year. Obtained results showed that the annual solar yield for the flat-plate collector was 664 kWh/m2year, whereas for the heat pipe evacuated tube collector was 885 kWh/m2year. The annual average collector efficiencies were 0.494 and 0.62, respectively.

【 授权许可】

Unknown