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《Global Geology》 2011-02
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ANSYS simulation of soil temperature field around U-tube in geothermal well

LU Peng1,2,SUN You-hong1,LI Qiang11.College of Construction Engineering,Jilin University,Changchun 130026,China;2.Logistics Service,Changchun University of Science and Technology,Changchun 130022,China  
Heat transfer between pipe heat exchanger and rock is a complex process,and finite element simulation method is an effective method to analyze this process.Through the comparative analysis to two-dimensional single well model,the authors establish two-dimensional multi-wells heat transfer model,there are nine heat storage wells with interval of 4 meters for each.The heat transfer process of this model follows the classic heat transfer theory.According to the ANSYS grid division principle,solution region is divided into the cells with the maximum edge length of 0.1 m and the smallest edge length of 0.01 m.Buried pipe is applied heat load density inside,and applied ground temperature boundary load outside,and after 72 hours simulation of heat storage process,accurate changing regularity of temperature field of rocks around multi-wells is obtained.The highest temperature is 40.263℃,the lowest is 10℃,and the influence radius is 1.4 m.The increased ampltude of temperature decreases,and the migration patterns of temperature and heat are obtained.The simulation results match well with the actual measurements.
【Fund】: 国土资源部公益性行业科研专项经费项目(200811066)
【CateGory Index】: TK124
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