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RESEARCH PAPERS: Phase-Change and Multiphase Heat Transfer

Study on Sublimation Phenomenon of Horizontal Frost Layer Exposed to Forced Convection Air Flow and Radiant Heat

[+] Author and Article Information
H. Inaba, S. Imai

Department of Mechanical Engineering, Okayama University, Tsushimanaka, 3-1-1, 700 Japan

J. Heat Transfer 118(3), 694-701 (Aug 01, 1996) (8 pages) doi:10.1115/1.2822688 History: Received February 21, 1991; Revised April 15, 1996; Online December 05, 2007

Abstract

The present paper deals with a new defrosting method for application to a cold heat exchanger by means of a frost sublimation phenomenon. The frost sublimation phenomenon occurs under the condition of temperature below the triple point of water (0.01°C, 0.6105 kPa). The present experimental study has focused on the heat and mass transfer processes at a horizontal frost layer in a moist airflow. It is found that the mass flux from the frost layer increases with the increase of water vapor mass concentration difference between the frost and main moist air flow, main air flow velocity, and the infrared radiant heat intensity. Nondimensional correlations for mass transfer, heat transfer, and defrost completion time have been derived.

Copyright © 1996 by The American Society of Mechanical Engineers
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