Natural convective flow and heat transfer of supercritical CO2 in a rectangular circulation loop

Xin Rong Zhang, Lin Chen, Hiroshi Yamaguchi

研究成果: Article査読

60 被引用数 (Scopus)

抄録

Fluid dynamics and heat transfer of supercritical CO2 natural convection are important for nuclear engineering and new energy system design etc. In this paper, in order to study the flow and heat transfer behavior of supercritical CO2 natural circulation system, a computational simulation on a closed natural circulation loop (NCL) model has been carried out. The fluid temperature in the loop varies between 298.15K and 323.15K, which is across the CO2 critical temperature, and the density is found to be in the range of 250-800kg/m3. The results show a small temperature difference of 25°C between heating and cooling sources can induce a mass flow with the Reynolds number up to 6×104 using supercritical CO2 fluid. A periodic reversal flow pattern is found and presented in this paper. Enhanced heat transfer phenomenon is also found for the supercritical CO2 natural convective flow. The mechanisms to this enhancement and the heating effect on the flow are also discussed in detail in the present study.

本文言語English
ページ(範囲)4112-4122
ページ数11
ジャーナルInternational Journal of Heat and Mass Transfer
53
19-20
DOI
出版ステータスPublished - 2010 9

ASJC Scopus subject areas

  • 凝縮系物理学
  • 機械工学
  • 流体および伝熱

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