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TECHNICAL PAPERS: Forced Convection

Measurements of Heat Transfer Coefficients From Supercritical Carbon Dioxide Flowing in Horizontal Mini/Micro Channels

[+] Author and Article Information
S. M. Liao, T. S. Zhao

Department of Mechanical Engineering, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China

J. Heat Transfer 124(3), 413-420 (May 10, 2002) (8 pages) doi:10.1115/1.1423906 History: Received April 24, 2001; Revised September 24, 2001; Online May 10, 2002
Copyright © 2002 by ASME
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References

Figures

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Gr/Reb2 values versus Tb/Tpc at ṁ/d=1.19 kg/m-s
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The friction factor f versus Reynolds number Reb at ṁ/d=1.19 kg/m-s and p=80 bar
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The effect of the bulk mean and wall mean temperature difference Tb−Tw on the Nusselt number Nub for d=1.1 mm at ṁ=0.1 kg/min
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Comparison of Eq. (14) and the experimental data for d=2.16 mm,ṁ=0.15 kg/min, and p=80 bar
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The effect of the tube diameters on the Nusselt number Nub at ṁ/d=1.19 kg/m-s
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Reb and Prb Number versus Tb/Tpc at ṁ/d=1.19 kg/m-s
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The effect of the mass flow rates on the heat transfer coefficient h for the tube of d=2.16 mm and at p=100 bar (the horizontal bars represent the CO2 temperature ranges over the test section)
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Variations of the heat transfer coefficient h with the bulk mean temperature for the tube of d=0.7 mm at ṁ=0.03 kg/min for different static pressures of 80 and 100 bar (the horizontal bars represent the CO2 temperature ranges over the test section)
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Schematic diagram of the test section
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Schematic diagram of the test loop
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Variations of the specific heat cp and the density ρ of CO2 at p=80 and 100 bar
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Comparison of Eq. (14) and the experimental data for d=0.7 mm,ṁ=0.05 kg/min, and p=80 bar
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Comparison of Eq. (19) and the experimental data

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