期刊
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
卷 33, 期 6, 页码 719-726出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.icheatmasstransfer.2006.02.006
关键词
internal fins; heat exchanger; heat transfer enhancement; pressure drop
The present study investigated the effect of internal aluminum fins with a star-shape cross-section on the heat transfer enhancement and pressure drop in a counterflow heat exchanger. A concentric-tube heat exchanger was used with water as the working fluid. The heat transfer rate increased by 12-51% over a plain tube value, depending on internal fin configurations used. However, the pressure drop also increased substantially by 286-399%. The results showed that a straight-fin configuration is the best to produce a heat transfer increase in a counterflow heat exchanger. Twisted fin configurations did not further increase the heat transfer rate. (c) 2006 Elsevier Ltd. All rights reserved.
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