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A study on the ground-coupled heat-pump system. 1. A simulation model and experiments of heat extraction during soil freezing in unsaturated solution.

[In Japanese. / En japonais.]

Author(s) : NAGANO K., OCHIFUJI K.

Type of article: Article

Summary

An explicit finite difference scheme was used to solve a couple of non-linear, partially differential equations concerning heat and moisture movement during freezing and melting in soil. The thermal conductivity of soil which was the most important thermal property in this calculation was calculated by serial-parallel model which consisted of four kinds of elements; soil particle, water, air and ice. This numerical model was verified in comparing the experimental results. Experiments were made in a small column with one end cooled below 0 deg C at the laboratory. At the end of the experiment, this column was cut into ten pieces of 2 cm thick and moisture content of each piece was measured. Given the measured initial and boundary conditions, the results of calculation were in accordance with the experimental results.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-3807
  • Languages: Japanese
  • Source: Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 54
  • Publication date: 1994/02
  • Document available for consultation in the library of the IIR headquarters only.

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