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【摘要】 介绍了循环单井地下换热系统的形式与运行,以及循环单井系统在国外的应用现状。分析了循环单井中井水与地下水的流动形式和换热。总结了循环单井系统的特点与优势,由于井内的水与地下含水层之间的原水交换其承担负荷能力显著增加,从而减少了钻井长度,减少了投资成本。以及循环单井系统存在的一些问题,其中最大的问题即热贯通。 【Abstract】 The system type of standing column well ground heat exchange systems(SCWGHES) is proposed in present study,and also this article introduces a survey of standing column well system in both here and abroad.The water in the well and in the ground's flow patterns and heat transfer have been analyzed.The characteristics and advantages of SCWGHES have been summarized,because of "bleed" the SCWGHES can bear more load,has shorter hole length,so the cost of investment can be less.Of course there are some problems in SCWGHES,the most serious is thermal transfixion. 【关键词】 循环单井系统; 应用; 流动形式; 换热; 优势; 热贯通 【Key words】 Sanding column well ground heat exchange systems; Application; Flow patterns; Heat transfer; Advantage; Thermal transfixion