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Effects of soil freezing on the ground heat exchanger performance.

[In Chinese. / En chinois.]

Author(s) : BAI T., ZHENG M., ZHANG J., et al.

Type of article: Article

Summary

The authors develop a transient heat transfer model considering soil freezing. With the finite volume method, they discretize the governing differential equations of the fluid, the pipe wall and the soil, and solve the soil freezing problem based on the sensible heat capacity method. The numerical calculation results indicate that the soil freezing region around the ground heat exchanger is small, but the heat conductivity of freezing soil increases, which is of greatly benefit to the soil heat transfer. When considering the effect of soil freezing, the outlet fluid temperature and the heat extracted from the ground are higher. High soil moisture content is beneficial to the heat transfer, but the effect of soil freezing on the performance of the ground heat exchanger is small with lower soil moisture content.

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Pages: pp. 1-15 (5 p.)

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Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 2010-0936
  • Languages: Chinese
  • Source: HV & AC - vol. 39 - n. 232
  • Publication date: 2009/12

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