灌注桩基埋管换热性能测试与对比分析

以江苏省昆山市地源热泵桩基一体化工程为研究对象,通过传统地埋管换热器与能量桩桩埋管换热器的换热试验对比,分别对传统并联双U垂直地埋管、并联双U灌注桩基埋管和并联双螺旋灌注桩基埋管等形式的换热器进行换热性能测试,得出3种埋管形式的平均换热量、单位管长平均换热量和单位埋管深平均换热量等因素的比对结果,并通过数据得出并联双U灌装桩基埋管换热器和并联双螺旋灌装桩基埋管换热器的每延米换热量分别是传统地埋管换热器的近2.5倍和5倍。

Heat Transfer Performance Test of Concrete Energy Pile and the Comparative Analysis

Taking ground source heat pump inside foundation piles integration project in Kunshan city of Jiangsu province as research object, the heat transfer performance of paralleled double U vertical pipe heat exchanger, paralleled double U concrete pile pipe heat exchanger and double paralleled spiral concrete pile heat exchanger were tested. We obtained the comparison of the average heat transfer flux, average heat transfer flux of per unit length, average heat transfer flux of per unit pile depth. Through the data, the heat transfer of paralleled double U vertical pipe heat exchanger and paralleled double U concrete pile pipe heat exchanger is 2.5 and 3 times of double parallel spiral concrete pile heat exchanger respectively.