著者

角田 正 永坂 茂之 飯柴 耕一

出版者

社団法人空気調和・衛生工学会

雑誌

学術講演会論文集

巻号頁・発行日

vol.16, no.3, pp.1683-1686, 2004-08-20

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This paper describes the outline and the operation results of GSHP system by using groundwater in the shallow layer. This system uses rainwater as heat medium and exchanges heat by using non-potable water pit and horizontal pipes around the pit under ground. The construction cost of horizontal pipe system is about 20% of vertical pipe system, and it's expected that horizontal system will be used widely in Japan. As a result of operation, the using ratio of geothermal energy is 84% in cooling period and 75% in heating period respectively, and the maximum capacity of geothermal use is 132kW. The characteristics of heat exchange by horizontal pipes are also described.