期刊
INTERNATIONAL JOURNAL OF REFRIGERATION
卷 27, 期 7, 页码 736-747出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2004.04.018
关键词
heat pump; carbon dioxide; thermodynamic cycle; high pressure; heat transfer
Heat transfer of supercritical carbon dioxide cooled in circular tubes was investigated experimentally. The effect of mass flux, pressure, and heat flux on the heat transfer coefficient and pressure drop was measured for four horizontal cooling tubes with different inner diameters ranging from I to 6 mm. The radial distribution of the thermophysical properties (i.e. specific heat, density, thermal conductivity and viscosity) in the tube cross-section was critical for interpreting the experimental results. A modified Gnielinski equation by selecting the reference temperature properly was then developed to predict the heat transfer coefficient of supercritical carbon dioxide under cooling conditions. This proposed correlation was accurate to within 20% of the experimental data. (C) 2004 Elsevier Ltd and IIR. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据