Effect of number of tube rows on the air-side performance of crimped spiral fin-and-tube heat exchanger with a multipass parallel and counter cross-flow configuration
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Author list: Pongsoi P., Pikulkajorn S., Wang C.-C., Wongwises S.
Publisher: Elsevier
Publication year: 2012
Journal: International Journal of Heat and Mass Transfer (0017-9310)
Volume number: 55
Issue number: 4
Start page: 1403
End page: 1411
Number of pages: 9
ISSN: 0017-9310
eISSN: 1879-2189
Languages: English-Great Britain (EN-GB)
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Abstract
The air-side performance of crimped spiral fin and tube heat exchangers at high Reynolds number (3000-13,000) is investigated in this study. The test heat exchangers have a new type of multipass parallel and counter cross-flow water flow arrangement which is a combination of parallel cross-flow and counter cross-flow. The test samples are made from copper and aluminium with different number of tube rows (Nrow = 2, 3, 4 and 5). The effects of number of tube rows and fin material on the heat transfer and friction characteristics are studied. The results show that no significant effect for either number of tube rows or fin materials on the heat transfer performance is found at high Reynolds number. In addition, the correlation of the air-side performances of this type of the heat exchangers at high Reynolds number is developed for industrial applications. ฉ 2011 Elsevier Ltd. All rights reserved.
Keywords
Crimped fin
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