单U和双U换热器地热井热响应测试与分析

对埋深分别为88 m和89 m的单U和双U型换热器地热井进行热响应测试,应用线源模型理论计算出两口测试井的土壤导热系数及钻孔热阻值,在保证测试仪向地热井输入恒定热流量的基础上,实测两地热井单位井深换热量分别为56 W/m和62 W/m,证明采用双U换热器的地热井传热特性要优于单U换热器地热井。

Testing and analysis of thermal response for single and double U heat exchanger geothermal well

On the depth of 88 m and 89 m respectively,thermal response test was made to single and double U-type heat exchanger geothermal well.Line source model theory applied two test wells to calculate the thermal conductivity borehole thermal resistance value of soil,on the basis of a constant heat flux input in the exchanger well,two heat exchange units of the measured depth of the geothermal heat exchange wells were 56 W/m and 62 W/m.It was proved that heat transfer of double U geothermal heat exchanger was supe...