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Flow boiling heat transfer in horizontal metal-foam tubes
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Zhao, Chang-Ying, Lu, Wei and Tassou, S. A. (2009) Flow boiling heat transfer in horizontal metal-foam tubes. Journal of Heat Transfer, Vol.131 (No.12). Article: 121002. ISSN 0022-1481
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Official URL: http://dx.doi.org/10.1115/1.3216036
Abstract
The two-phase flow and boiling heat transfer in horizontal metal-foam filled tubes are experimentally investigated. The results show that the heat transfer is almost doubled by reducing the cell size from 20 ppi to 40 ppi for a given porosity, thanks to more surface area and strong flow mixing for the smaller cell size. The boiling heat transfer coefficient keeps steady rising, albeit slowly, by increasing the vapor quality for high mass flow rates, while the same story does not hold for the cases of low mass flow rates. The flow pattern can be indirectly judged through monitoring the cross-sectional wall surface temperature fluctuations and wall-refrigerant temperature difference. As the operating pressure increases, the boiling heat transfer at low vapor quality (x < 0.1) exhibits similar behavior with pool boiling heat transfer namely, the heat transfer is enhanced by improving the pressure. However the flow boiling heat transfer is suppressed to some extent as the pressure increases. The heat transfer coefficient of copper foam tubes is approximately three times higher than that of plain tubes. [DOI: 10.1115/1.3216036]
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Science > Engineering |
| Library of Congress Subject Headings (LCSH): | Heat -- Transmission, Metal foams, Two-phase flow |
| Journal or Publication Title: | Journal of Heat Transfer |
| Publisher: | ASME International |
| ISSN: | 0022-1481 |
| Date: | December 2009 |
| Volume: | Vol.131 |
| Number: | No.12 |
| Number of Pages: | 8 |
| Page Range: | Article: 121002 |
| Identification Number: | 10.1115/1.3216036 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC) |
| Grant number: | EP/F061439/1 (EPSRC), GR/T24364/01 (EPSRC), 50576069 (NSFC) |
| URI: | http://wrap.warwick.ac.uk/id/eprint/16932 |
Data sourced from Thomson Reuters' Web of Knowledge
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