Comparative analyses on 2D and 3D buried tube-group heat transfer models in GCHP system

doi:10.7523/j.issn.1002-1175.2013.03.005

Abstract

Abstract:

Choice of a heat transfer model for buried tube-group heat exchangers (GHEs) is the key to accurate calculation of the heat exchange of GHEs in ground-coupled heat pump (GCHP) system. Based on practical projects, the 2D and 3D unsteady heat transfer models of vertical U-tube GHEs are constructed. With Fluent as a computational tool,the heat coupled calculations for a period of 15 years are carried out and soil temperature variation curves are obtained. By taking the 3D model numerical results as benchmark and goodness-of-fit as reference parameter, application conditions for the 2D model are analyzed.

Key words: ground-coupled heat pump, pipe-group heat exchangers, 3D calculation model, 2D calculation model

CLC Number:

TU831

JIA Ya-Bei, WANG Yong. Comparative analyses on 2D and 3D buried tube-group heat transfer models in GCHP system[J]. Journal of University of Chinese Academy of Sciences, 2013, 30(3): 311-316.

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