基于AHP探针法的土壤源热泵现场热响应试验研究

Research on filed thermal response test of ground source heat pump based on AHP probe method

由于探针法和现场热响应试验法为测试岩土热物性参数的常用方法,因此文章基于邢台地区某土壤源热泵工程,将室内探针法和现场热响应试验法确定的热物性参数进行对比分析。首先,根据探针法和现场热响应试验法测试结果的差异,选取地层厚度、含水率、密度及渗透率作为影响土壤样品热物性参数的主要因素,并利用层次分析法来确定各影响因素的权重值;接着,利用各因素的权重值来修正探针法的测试结果;然后,将探针法和现场热响应试验所确定的岩土热物性参数进行比较,得出两个测量结果的相对误差小于10%;最后,对于土壤源热泵项目,文章利用修正后的探针法对现场热响应试验结果进行验证。

The commonly used method of rock soil thermal parameters tests are probe method and field thermal response, the author takes a ground source heat pump（GSHP） project in Xingtai area as an example, this paper presents a method based on indoor probe method parameter of the rock soil thermal properties. Firstly, based on discrepancy of testing results between probe method and field thermal response test, soil thickness, water ratio, density and permeability are chosen as primary factors that affect difference of thermal physical parameters between probe method and field thermal response test.And the weighted value of each influence factor was determined by using analytic hierarchy process（AHP）, and the results of the thermal physical property parameters of the probe method were modified with that value. Then, the thermal physical parameters of the soil thermal physical parameters determined by the probe method are compared with that of the filed thermal response test method, and the relative error is less than 10%. Finally, for the GSHP project, the results of the filed thermal response test of the rock and soil will be verified by the method of the modified probe method.