Experimental investigation of frost retardation for superhydrophobic surface using a luminance meter

Title
Experimental investigation of frost retardation for superhydrophobic surface using a luminance meter
Author
김동립
Keywords
Surface treatment; Superhydrophobic; Frost stage; Contact angle; Frost retardation
Issue Date
2015-04
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v. 87, Page. 491-496
Abstract
We experimentally investigated the phenomena of frost retardation in terms of the heat exchanger fins with various water contact angles under normal air-source heat-pump operating conditions. We first introduced a new experimental method using a luminance meter, which measured the light intensity from the surface, and determined the phase-change time, for quantitatively defining the frost stages. The phenomena of frost retardation was analyzed for 10 samples with different water contact angles (75 degrees-160 degrees) at different refrigerant temperatures. When the refrigerant temperature was -10 degrees C or -12 degrees C, the effect of frost retardation increased remarkably with superhydrophobic surfaces. However, when the refrigerant temperature was -8 degrees C, the effect of superhydrophobicity diminished at water contact angles greater than 150 degrees. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0017931015004020http://hdl.handle.net/20.500.11754/23718
ISSN
0017-9310; 1879-2189
DOI
10.1016/j.ijheatmasstransfer.2015.04.042
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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