地源热泵岩土热响应测试分析及应用

Analysis and Applications of Geothermal Response Test for Ground Coupled Heat Pump

采用地源热泵清洁能源是中国地质大学(武汉)新校区建设绿色生态校园、提升能源利用结构和效率的重要内容。通过在现场热响应试验充分掌握了该项目区域内地层热物性参数,量化分析了岩土热物性参数的变化规律和特点,得到区域内浅地层初始温度为18.26℃、地层平均热传导系数为1.76 W/m·K,单孔每延米排热量、吸热量分别为50.64 W/m、38.23 W/m,为区域内地源热泵系统的设计提供了依据。

China university of geosciences(Wuhan)intends to use a ground coupled heat pump system in its new campus for heating in winter and cooling in summer,as part of its plan to build an eco-friendly campus and improve energy utilization structure and efficiency.This paper explores and quantitatively analyzes the variation patterns and characteristics of geotechnical thermophysical parameters through field thermal response tests.It is found that the initial temperature of the shallow formation in the site is 18.26℃,the average thermal conductivity coefficient of the formation is 1.76 W/m·K,and the heat dissipation and heat absorption of a single hole per linear meter are 50.64 W/m and 38.23 W/m respectively,which provides a reference for the design of ground coupled heat pump systems.