Performance evaluation of single tubular aluminium foam heat exchangers

Chumpia, A. and Hooman, K. (2014) Performance evaluation of single tubular aluminium foam heat exchangers. Applied Thermal Engineering, 66 1-2: 266-273. doi:10.1016/j.applthermaleng.2014.01.071

Author Chumpia, A.
Hooman, K.
Title Performance evaluation of single tubular aluminium foam heat exchangers
Journal name Applied Thermal Engineering   Check publisher's open access policy
ISSN 1359-4311
Publication date 2014-01-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.applthermaleng.2014.01.071
Open Access Status Not Open Access
Volume 66
Issue 1-2
Start page 266
End page 273
Total pages 8
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Abstract Five samples of aluminium foam-wrapped tubular heat exchanger are being tested for heat transfer performance and pressure drop characteristics. The foam layer has thickness (or height) varied from 5 mm to 20 mm. The tests are carried out on each heat exchanger, installed horizontally in a cross-flow arrangement inside an open circuit wind tunnel, one at a time with air velocity varying between 0.5 and 5 m/s. Heat transfer rate from 75 C hot liquid, circulating through the core tube, to external air is evaluated. These results, together with temperature differential between the ambient air and the foam surface, allow evaluation of the overall thermal resistance. Pressure drops across each sample are recorded. The performance of the foam heat exchangers is assessed by comparing their thermo-hydraulic results against those of a conventional finned tube with similar dimensions and tested under the same conditions. The results show that, within the designated air velocity range, the foam heat exchangers with thicker foam layer perform better than those with thinner foam layer. However, the heat transfer advantage does not increase linearly with foam thickness - signifying the existence of an optimum thickness when an increase in pressure drop at increased air velocity is taken into account. Finally, the correlations to predict the overall thermal resistance and pressure drop are presented.
Keyword Air cooled condensers
Cross flow measurements
Dry cooling towers
Heat exchanger bundles
Metal foam heat exchangers
Thermo-hydraulic performance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 15 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 15 times in Scopus Article | Citations
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