吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (4): 998-1003.doi: 10.13229/j.cnki.jdxbgxb201404015

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Pipe-soil gap induced by thermal deformation of ground heat exchange pipe

ZHU Xiao-lin1, 2, YU Ming3, GAO Qing1, 2, WANG You-tang1, 2   

  1. 1.State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China;
    2.College of Automotive Engineering, Jilin University, Changchun 130022, China;
    3. College of Materials Science and Engineering, Jilin University, Changchun 130022, China
  • Received:2013-04-16 Online:2014-07-01 Published:2014-07-01

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Abstract: The geometrical model of typical plane bending state of heat exchange pipe and the constitutive model are established. Then the thermal deformation characteristics of pipe-soil structure in heat transfer at different temperatures are analyzed. It is focused on the influence of typical initial thermal deformation of bending pipe on the development of pipe-soil gap evolution. Results show that larger pipe-soil gap appears in the concave side of the bending heat exchange pip. The gap distribution around the buried pipe is about half of the pipe perimeter. The larger gap of smaller bending deflection or no bending heat exchange pipe mainly appears at the corresponding area between two pipes of U-type heat exchange pipe. The magnitude of pipe-soil gap increases with the bending degree of the heat exchange pipe.

Key words: technology of energy storage, ground heat exchanger, thermal deformation, pipe-soil gap, numerical analysis

CLC Number: 

  • TK523
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