Based on the above study, a three-dimensioned unsteady heat transfer model of U-type UCHE was established, which took different thermal properties of soil layers and groundwater flow into account.

• 在上述研究基础上,围绕埋地换热器与周围土壤的换热过程,考虑沿深度方向土壤层之间热物性的不同以及地下水流动等因素,建立了垂直U型埋地换热器三维非稳态数值传热模型。