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TECHNICAL PAPERS

Studies of Heat Pumps Using Direct Expansion Type Solar Collectors

[+] Author and Article Information
Sadasuke Ito, Naokatsu Miura, Yasushi Takano

Department of System Design Engineering, Kanagawa Institute of Technology, Atsugi, 243-0292 Japane-mail: ito@sd.kanagawa-it.ac.jp

J. Sol. Energy Eng 127(1), 60-64 (Feb 07, 2005) (5 pages) doi:10.1115/1.1824102 History: Received October 21, 2003; Revised July 30, 2004; Online February 07, 2005
Copyright © 2005 by ASME
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References

Fujita, M., Takushima, A., Nakahara, Y., and Ito, S., 1998, “Studies of a System for Electric Power Generation, Air Conditioning and Hot Water Supply Using Photovoltaic and Thermal Hybrid Panels—Heat Pump System and the Results of Operations in the Summer Time,” Proc. JSES/JWEA Joint Conference, Okinawa, pp. 305–308 (in Japanese).
Kanou, M., Murata, T., and Nakahara, Y., 1999, “Evaluation Test of Photovoltaic-Thermal Hybrid System for Residential Building in Summer Time,” Proceedings of the JSES/JWEA Joint Conference, Ooita, pp. 333–336 (in Japanese).
Charter, W. W. S., and Taylor, L. E., 1976, “Some Performance Characteristics of a Solar Boosted Heat Pump,” Proceedings of the I. I. R. Conference, Melbourne, Australia, pp. 641–648.
Chaturvedi,  S. K., Chiang,  Y. F., and Roberts,  A. S., 1982, “Analysis of Two-Phase Flow Solar Collectors With Application to Heat Pumps,” J. Sol. Energy Eng., 104, pp. 358–365.
1982, “Direct Expansion Solar Collector and Heat Pump,” U.S. DOE Rep (USA) [DOE-SF-10542-T1].
O’Del,  M. P., Michel,  J. W., and Beckma,  W. A., 1984, “Design Method and Performance of Heat Pumps with Refrigerant-filled Solar Collectors,” J. Sol. Energy Eng., 106, pp. 159–164.
Krakow,  K. I., and Lin,  S., 1984, “Seasonal Performance of Multiple-Source Heating in Cold Climates,” ASHRAE Trans., 90, pp. 137–151.
Hino,  T., 1998, “Performance Prediction of an Ambient Energy Heat Pump Based on Sol-Air Temperature,” J. Archit. Plan. Environ. Eng., AIJ, No. 503, pp. 53–60.
Ito,  S., Miura,  N., Wang,  J. Q., and Nishikawa,  M., 1997, “Heat Pump Using a Solar Collector with Photovoltaic Modules on the Surface,” ASME J. Sol. Energy Eng., 119, pp. 1–5.
Fujita, M., and Ito, S., 1995, “Heat Pump Using Evaporator with Photovoltaic Modules (Influence of Weather Conditions and Condensation Temperature on the Performance),” Proceedings of the Symposium on Environmental Engineering, Yokohama, pp. 353–356 (in Japanese).
Ito,  S., Miur,  N., and Wang,  K., 1999, “Performance of a Heat Pump Using Direct Expansion Solar Collectors,” Sol. Energy, 65, pp. 189–196.

Figures

Grahic Jump Location
Panels used as evaporators
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Variation of temperatures at various locations, tw,1=40°C
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Variation of COP and heat gain of water
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Experimental results of the system using Type 1 panels
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Experimental results of the system using Type 2 panels
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Relation between COP and the temperatures at the outlet of the expansion valve
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Variation of the temperatures at various locations when the feeler bulb was set at the location 0.6 m apart from the outlet of the evaporator
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Relation between COP and evaporation temperature
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Variation of evaporation temperature

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