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摘要 提出了适合工程设计计算的水平螺旋地埋管换热器的传热模型，该模型以无限大介质中的一维非稳态传热为基础，同时考虑单位面积埋管长度的影响及长期平均负荷和短期脉冲负荷的不同作用。讨论了单位面积埋管长度和土壤的热物性对水平螺旋地埋管换热器的影响。结合工程实例，计算了所需的埋管长度和埋管的占地面积，与竖直埋管系统进行了比较。 关键词 地源热泵 水平螺旋地埋管换热器 传热模型 单位面积埋管长度 Ground-source heat pump systems with horizontal spiral ground heat exchangers By Lin Yun, Zhao Qiang and Fang Zhaohong Abstract Proposes a heat transfer model expected to be used in engineering design of the horizontal spiral ground heat exchangers. The model is based on the one-dimensional unsteady heat transfer in an infinite medium, considering the influence of the tube length per unit area and the different effects of long-term mean load and short-term intermittent load. Discusses the influence of the tube length per unit area and the thermal properties of the soil on the performance of the horizontal spiral ground heat exchangers. With an engineering example, calculates the tube length and the area, and compares them with those of vertical systems. Keywords ground-source heat pump, horizontal spiral ground heat exchanger, heat transfer model, tube length per unit area