本文用地源热泵地下换热器线热源模型、简化柱热源模型和二维瞬态数值传热模型对地下土壤导热系数分别进行了计算。
The line source model, the simplified cylindrical source model and the two-dimensional numerical model were used to determine the thermal conductivity of underground soil.
结果表明，总体上讲土壤的导热系数随砂与含水量增加而增大。
The results indicate that, as a whole, the conductivity of soil enhances with the increase of the content of sand and water.
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