住宅用基礎杭を利用した地中熱ヒートポンプの熱交換性能

抄録

A ground source heat pump that use direct expansion method uses an underground heat exchanger which is put a copper pipe directly in a borehole of 20-30 m. We have carried out an experiment using the underground heat exchanger which inserted the copper pipe in the steel pipe pile. In the present paper, we have described the thermal performance of the ground source heat pump when 15 steel pipe piles were used. The prospect that coefficient of performance of this method was higher than that of the indirect method of ground source heat pump was obtained.