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Flow boiling heat transfer of R600a in a uniformly heated smooth vertical minichannel
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0002-9902-2087
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2013 (English)In: Proceedings of the 13th UK Heat Transfer Conference Sept. 2-3, 2013, UKHTC2013, 2013Conference paper, Published paper (Refereed)
Abstract [en]

Refrigerant related environmental concerns forced legislative bodies to phase out some types of refrigerants namely CFC’s and HCFC’s and in the near future European legislation will be affecting HFCs as well. Natural refrigerants such as hydrocarbons can thus be expected to be more common as refrigerants in the future. Experimental studies with these fluids are important in understanding their performance and potential. Experimental findings on flow boiling of Isobutane in a uniformly heated, vertical, stainless steel test section (1.6 mm inside diameter and 245mm heated length) are reported in this article. Experiments were conducted at two saturation pressures corresponding to the temperature of 27 and 32 oC, with five mass fluxes in the range 50-350 kg/m2s and at outlet vapour qualities up till dryout conditions. Analysis showed that heat transfer was primarily controlled by the applied heat flux with insignificant effect of mass flux and vapor quality. The experimental results were compared with different macro and micro-scale correlations from the literature, and Owhaib, Liu & Winterton and Mikielewicz correlations quite accurately predicted the heat transfer data.

Place, publisher, year, edition, pages
2013.
National Category
Engineering and Technology Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-136072ISBN: 978-0-9572298-5-3 (print)OAI: oai:DiVA.org:kth-136072DiVA: diva2:670478
Conference
13th UK Heat Transfer Conference, 2-3 September 2013, London, England
Note

NQC 2014

Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2014-06-11Bibliographically approved

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Palm, Björn

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CiteExportLink to record
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Citation style
  • apa
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Output format
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  • asciidoc
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