根据泵站工程特点，利用置于天然水体中进行冷却的盘管冷却器组成的密闭循环供水系统，是一种节能、可靠的技术供水方式。依据传热学理论对盘管冷却器传热原理进行分析后，提出不同安装形式的冷却盘管换热面积计算公式。研究发现，当盘管处于静止水体中且以自然对流传热为主而利用水体容量带走热量时，所需盘管的换热面积最大；当盘管处于流动水体中且以强制对流传热为主而利用水体流动带走热量时，所需盘管换热面积较小；采取加大管道内部热流体或管道外部冷却水体流速代谢，可以减少换热面积，但需要相应增加管道安装要求和运行成本；为节省投资、延长使用寿命，盘管换热材料建议采用不锈钢材质。

According to the engineering characteristics of the pump station, the closed circulating water supply system composed of the coiled pipe cooling device which was installed in natural water for cooling is an energy-saving and reliable technical water supply mode. The heat transfer principle of the coiled pipe cooler was analyzed using the heat transfer theory, and the calculation formulas of heat exchange area of coiled pipe cooler under different installation forms were proposed. The results showed that (1) when the coiled pipe cooler is in static water with natural convection heat transfer and water capacity is used to carry away heat, the heat exchange area of the coiled pipe cooler is the largest; (2) when the coiled pipe cooler is in flowing water with forced convection heat transfer and water flow is used to carry away heat, the heat exchange area of the coiled pipe cooler is the lower; (3) increasing of the pipe internal thermal fluid or the flow rate of cooling water outside of the pipe can reduce the heat transfer area, but it increases the pipeline installation requirements and operation cost; and (4) the stainless steel material is recommended for the coil material in order to save the investment and prolong the service life.