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Journal of Zhejiang University SCIENCE A
ISSN 1673-565X(Print), 1862-1775(Online), Monthly
2000 Vol.1 No.2 P.129-135
NUMERICAL INVESTIGATION ON THE PHASE CHANGE OF WATER-SATURATED POROUS MEDIA WITH THERMOSYPHON
Abstract: Numerical investigations were carried out to determine the coupled heat transfer of water-saturated porous media with a two-phase closed thermosyphon for soil freezing, and to examine the characteristics of the freezing heat transfer in the water-saturated porous media. The whole control volume includes the thermosyphon and the porous media. The two-dimensional governing equations for the water-saturated porous media are used.
The conjugation of heat transfer between the thermosyphon and porous media is reflected through thermal balance between the thermosyphon and the porous media.
The finite-difference method was used to solve the two-dimensional governing equation for the water-saturated porous media and the heat transfer characteristics of the thermosyphon, obtain the flow fields and the temperature distributions in the soil. This paper deals mainly with the effect of some factors (such as soil properties, climate and thermosyphon dimensions) on the heat transfer rate of the thermosyphon and the growth of the freezing front. The predictions of the present study agree well with the measured data.
Key words: thermosyphon, water-saturated porous, soil freezing, coupled heat transfer
References:
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[4]He Jialun, Ma Tongze and Zhang Zhengfang, 1992b, Investigation of Boiling Liquid Pool Height of a Two-phase Closed Thermosyphon, In: Advances in Heat Pipe Science and Technology, edited by Ma Tongze. Printing House of China Building Industry Press, Beijing, China, p.154-159
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[11]Wu C. Z. and Gu W. B., 1993, Heat Transfer Prediction of Two-phase Closed Thermosyphon with Freezing, Proc. of 4th Int. Symp. on Cold Region Heat Transfer, p.219-297
Open peer comments: Debate/Discuss/Question/Opinion
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DOI:
10.1631/jzus.2000.0129
CLC number:
TK214
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Received:
1998-12-12
Revision Accepted:
1999-05-18
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