A photovoltaic and thermal hybrid panel which was made of an aluminum roll -bond panel with a photovoltaic module on the surface was developed recently for use as an evaporator of a heat pump for residential hot water supply and room heating.1) Pressure loss of the refrigerant at the evaporator was large. Therefore, in the present study, shapes of the inlet and the outlet of the panel were modified to reduce pressure loss; also, thermal performance of the heat pump which adopted three evaporator panels connected in series was examined. Total area of the panels was about 1.9 m2 and the rated capacity of the compressor was 250 W. These modifications reduced pressure loss and improved thermal performance. The effect of the location of the feeler bulb on performance of the heat pump was also examined. It was inferred that the feeler bulb fixed on the tube at the outlet of the evaporator should be as close as possible to the evaporator outlet.
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ASME 2003 International Solar Energy Conference
March 15–18, 2003
Kohala Coast, Hawaii, USA
Conference Sponsors:
- Solar Energy Division
ISBN:
0-7918-3676-2
PROCEEDINGS PAPER
Studies of Heat Pumps Using Direct Expansion Type Solar Collectors
Sadasuke Ito,
Sadasuke Ito
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
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Naokatsu Miura,
Naokatsu Miura
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
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Yasushi Takano
Yasushi Takano
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
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Sadasuke Ito
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
Naokatsu Miura
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
Yasushi Takano
Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan
Paper No:
ISEC2003-44212, pp. 327-331; 5 pages
Published Online:
January 5, 2009
Citation
Ito, S, Miura, N, & Takano, Y. "Studies of Heat Pumps Using Direct Expansion Type Solar Collectors." Proceedings of the ASME 2003 International Solar Energy Conference. Solar Energy. Kohala Coast, Hawaii, USA. March 15–18, 2003. pp. 327-331. ASME. https://doi.org/10.1115/ISEC2003-44212
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