抄録
Concerning a hot water supply system, about 3.5 millions units of electrical heat-pump system have been used in Japan as of May 2013. Those systems effectively utilize surplus electricity at very early morning in Japan, while solar thermal panel constantly increases in the world. Although the performance of the heat pump system would be very high, it isn't more superior being than the simple solar thermal panel from a viewpoint of energy consumption. The present study has started to get fundamental information how much electricity can be saved through a year at Yokohama area when we use a decompression solar collector as an evaporator of heat pump system. We have constructed a testing device, which consists of four solar collectors being about 7.8 m^2 and a compressor of the heat pump system with the nominal maximum power consumption of 1.6 kW. We got preliminary experimental data by operating in winter season of January 2013. This paper introduces the device and the experimental results.
