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A study on heat transfer enhancement using straight and twisted internal fin inserts

✍ Scribed by Leonard D. Tijing; Bock Choon Pak; Byung Joon Baek; Dong Hwan Lee

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 251 KB
Volume: 33
Category: Article
ISSN: 0735-1933
DOI: 10.1016/j.icheatmasstransfer.2006.02.006

No coin nor oath required. For personal study only.

✦ Synopsis

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.

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