Study of Forced Convection Heat Transfer of Supercritical CO<sub>2</sub> in a Horizontal Channel by Lattice Boltzmann Method
Year: 2010
Author: Xiaodong Niu, Hiroshi Yamaguchi, Yuhiro Iwamoto, Xinrong Zhang, Mingjun Li, Yuhiro Iwamoto
Advances in Applied Mathematics and Mechanics, Vol. 2 (2010), Iss. 5 : pp. 564–572
Abstract
The problem of forced convection heat transfer of supercritical CO2 in a horizontal channel is investigated numerically by a lattice Boltzmann method. This study is stimulated by our recent experimental findings on solar collectors using supercritical CO2 as a working fluid, which can achieve the collector efficiency high up to 70%. To deeply understand the heat transfer characteristics of supercritical CO2 and provide a theoretical guidance for improving our current experimental system, in present study several typical experimental flow conditions are simulated. In particular, the work focuses on the convective heat transfer characteristics of supercritical CO2 flowing in a horizontal channel with mediate Reynolds numbers ranging from 210 to 840 and constant heat fluxes from 400.0 to 800.0 W/m$^2$. The simulations show that the heat transfer increases with heat flux and decreases with Reynolds number. Furthermore, the mechanisms of heat transfer enhancement of supercritical CO2 fluid are identified.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/aamm.10-10S03
Advances in Applied Mathematics and Mechanics, Vol. 2 (2010), Iss. 5 : pp. 564–572
Published online: 2010-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 9