The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회지:설비저널)
- Volume 15 Issue 2
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- Pages.188-195
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- 1986
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- 1229-6430(pISSN)
A Study on Condensation Heat Transfer to Some Evaporated Metal Surface
각종증착금속면의 응축열전달에 관한 연구
- Published : 1986.06.01
Abstract
Condensation heat transfer can be classified in dropwise condensation and filmwise condensation, and for the industrial purpose, the former is more useful than the latter because of the higher heat transfer rate. But it is difficult to maintain the dropwise condensation continuously since most of the metal surfaces become wetted after exposure to a condensing vapor over an extended period of time. To maintain dropwise condensation continuously , various surface coatings and promoters have been used recently, but these methods must be reconsidered about the durability of condensing surface. Therefore, in this study, evaporating method of various pure metals on the condensing surface has been performed to maintain dropwise condensation. The results have showed that the heat transfer rate of silver evaporating surface is higher than any other metal evaporating in dropwise area. Transition temperature and filmwise condensation curves are uniform regardless of kinds of evaporating metals.
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