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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Druckformat: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v7.i4.50
10 pages

A STUDY OF WATER HOLDUP ON TWO SURFACES WITH DIFFERENT HYDROCHARACTERISTICS

Jongmin Shin
Home Appliance Research Lab., LG Electronics Inc., Gaeumjeong-Dong 391-2, Changwon, Kyoungnam 641-711, Korea
Cheolhwan Kim
Home Appliance Research Lab., LG Electronics Inc., Gaeumjeong-Dong 391-2, Changwon, Kyoungnam 641-711, Korea
Samchul Ha
Home Appliance Research Lab., LG Electronics Inc., Gaeumjeong-Dong 391-2, Changwon, Kyoungnam 641-711, Korea
Jeongbae Kim
Department of Mechanical Engineering, Two-phase Flow Lab., Pohang University of Science and Technology, San 31, Hyoja Dong, Pohang 790-784, Korea

ABSTRAKT

An experimental study on water holdup on surfaces having different hydrocharacteristics was conducted to investigate the defrost performance of fin plates used in refrigerator evaporators. The aging characteristics of the surfaces were investigated. Flow patterns and surface morphologies were visualized, and their results agreed well with the aging characteristics of the surfaces. The surface with better hydrophilicity turned out to provide a lower water holdup and, in turn, a more highly efficient defrost cycle. The study on the geometry of hydrophilic surfaces on water holdup revealed that fewer and sharper edges of hydrophilic surfaces result in less water holdup and, thus, a higher defrost efficiency.


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