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How to solve underground soil thermal balance problem is important for ground source heat pump system. Basing on the experiments of a ground source heat pump system with horizontal spiral pipes in Wuhan, the operation controlling strategies of intermittent operation and continuous operation in this system were studied in this paper. The temperatures of inlet and outlet water in the underground heat exchanger, and soil temperatues around the buried pipe were tested. And these temperaure changesdoi:10.1088/1755-1315/510/2/022001 fatcat:a4vm2543pzhavk2q7zgg6pyozq