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http://dx.doi.org/10.3795/KSME-B.2004.28.11.1424

Flow Condensation Inside Mini-Channels (I) -Development of New Experimental Technique-  

Shin, Jeong-Seob (한국과학기술원 기계공학과)
Kim, Moo-Hwan (포항공과대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.11, 2004 , pp. 1424-1431 More about this Journal
Abstract
With traditional experimental methods such as the secondary fluid (e.g., water) calorimetric method, it is very difficult to accurately test the local condensation heat transfer inside mini-channels. Hence, there are large discrepancies between the results of previous studies. The experimental methods as well as unidentified sources of uncertainties could be reasons for such discrepancies. In this study, innovative experimental techniques were developed to measure the in-tube condensation heat transfer coefficient. With these techniques, very low heat dissipation rates such as several watts from the mini-channel could be estimated and low mass flow rates below the 0.1 ㎏/h could be measured with reasonable uncertainties. To the authors' knowledge, these techniques provide a unique experimental apparatus for measuring the condensation heat transfer coefficients inside the sub-millimeter hydraulic diameter single channels.
Keywords
Mini-Channel; Two-Phase Flow; Flow Condensation; Heat Transfer;
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