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TECHNICAL PAPERS: Melting and Freezing

Observations of Early-Stage Frost Formation on a Cold Plate in Atmospheric Air Flow

[+] Author and Article Information
Chin-Hsiang Cheng, Keng-Hsien Wu

Department of Mechanical Engineering, Tatung University, Taipei, Taiwan 10451, R.O.C.

J. Heat Transfer 125(1), 95-102 (Jan 29, 2003) (8 pages) doi:10.1115/1.1513576 History: Received November 01, 2001; Revised June 13, 2002; Online January 29, 2003
Copyright © 2003 by ASME
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References

Figures

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Cooling assembly: (a) cold plate and cooling unit; and (b) locations of thermocouples
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Frost growth, for V=2.5 m/s,Ta=26.5°C, ϕ=41 percent, and Tw=−7.2°C
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Frost growth, for V=6.0 m/s,Ta=27.3°C, ϕ=44 percent, and Tw=−10.2°C
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Effects of cold plate surface temperature on frost thickness, for V=4.2 m/s,Ta=27.3°C, and ϕ=41 percent
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Effects of air temperature on frost thickness, for V=2.3 m/s, ϕ=76 percent, and Tw=−11.3°C
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Effects of air temperature on the structure of frost layer for V=2.3 m/s, ϕ=76 percent, and Tw=−11.3°C. Photographs are taken at t=8 min. (a) Ta=23.3°C; and (b) Ta=28.4°C.
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Effects of air velocity on the frost thickness, for Ta=27.6°C, ϕ=42 percent, and Tw=−10.4°C
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Effects of air velocity on the frost thickness of the multiple-step ascending frost layer, for Ta=27.1°C, ϕ=71 percent, and Tw=−5.1°C
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Effects of relative humidity on frost thickness, for V=10.0 m/s,Ta=28.6°C, and Tw=−8.2°C
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Comparison in frost thickness between the experimental data and the theoretical predictions by Cheng and Cheng 22, for V=4.2 m/s,Ta=26.9°C, ϕ=41 percent, and Tw=−7.2°C
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Comparison in frost thickness between the experimental data and the theoretical predictions by Cheng and Cheng 22, for V=6.1 m/s,Ta=26.7°C, ϕ=72 percent, and Tw=−5.0°C

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