浅層の地中熱を利用するヒートポンプの冷房性能

抄録

In this study，the cooling performance of a direct-expansion ground source heat pump with an underground heat exchanger placed in the shallow part of the underground was investigated．As a preliminary test，the heat exchanger was inserted into a stainless-steel container filled with water，utilizing an air/refrigerant heat exchanger used in commercial air source heat pumps．Water was poured into the stainless-steel container to ensure performance when the amount of heat radiation taken from the shallow part of the underground was insufficient．The average COP was 2.9 when the set temperature was 24°C．