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자료유형
학술대회자료
저자정보
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한국태양에너지학회 한국태양에너지학회 학술대회논문집 한국태양에너지학회 2004 Proceedings ISEA Asia-Pacific
발행연도
2004.10
수록면
73 - 78 (6page)

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In order to protect global warming due to the greenhouse effect, the use of renewable energy such as solar energy must be promoted. The demand of electric power generated by photovoltaic (PV) systems is increasing favorably in Japan as it was expected. The production of PV cells in Japan was 80MW per year in 2002 being highest in the world in which 200MW was produced in the year. It is said that a PV system which generates 3 kW at the peak can cover the demand of the electric power mostly for a common residential house. If the conversion efficiency of a PV system is 12%, the total area of the PV modules on the roof is 25㎡ to produce 3 kW at the solar radiation intensity of 1 kW/㎡. It would be not so easy to have such large space in the roof to install the PV modules. Most of the solar energy absorbed by PV modules is converted to heat which is dissipated to the ambient air. The demand of energy for space heating and hot water supply is about 60 % of the total energy demand of a house. Considering that much energy for space heating and hot water supply is necessary, it is desirable to use the solar heat produced by the PV cells effectively. The system which supplies electric power and heat by using PV cells is called a photovoltaic and thermal hybrid (PV IT) system. One of the merits of a PV/T system is that the conversion efficiency of the solar energy to electric power increases due to the cooling effect by the heat transfer medium which absorbs the heat from the solar cells.
In this paper, we introduce three types of PV IT systems, in which the authors are interested, and report the situations ofPV/T systems in Japan.

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Abstract

1. Solar houses adopting PV/T panels which use water or antifreeze liquid as the heat transfer medium

2. Solar houses adopting PV/T panels which use air as the heat transfer medium

3. Heat pump using PV/T panels as the evaporator

4. Conclusion

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