土壤热源热泵地下换热性能分析

以土壤热源热泵为研究对象，采用探针法对4种情况下的土壤的导热性能进行实验研究，结果表明，总体上讲土壤的导热系数砂与含水量增加而增大，在4种配比情况下，当含水量相同时，土与砂比率为1：2时土壤导热系数达到最大，但土与砂比率为2：1时与其相差不多，则土与砂比率采用2：1时可认为更经济。

RESEARCH ON THE SURFACE HEAT EXCHANGE PERFORMANCE OF THE SOIL-SOURCE HEAT PUMP

Using thermoprobe method, the experiment research on the conductivity of the soil in four different states were completed. The results indicate that, as a whole, the conductivity of soil enhances with the increase of the content of sand and water. In all these kinds of mixture, when the content of water remains the same, the conductivity of soil reaches its maximum when the ratio of earth to sand is 1 to 2. However,when the ratio of earth to sand is 2 to 1, the conductivity of soil is almost the same and only a little lower. So, it is more economical to use the soil in which the ratio of earth to sand is 2 to 1.