Two-phase heat transfer measurements of r254fa at high saturation temperatures in horizontal mini-channels

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dc.contributor.author Billiet, M. en
dc.contributor.author Charnay, R. en
dc.contributor.author Revellin, R. en
dc.contributor.author Bokisova, L. en
dc.contributor.author De Paepe, M. en
dc.date.accessioned 2017-08-28T07:08:22Z
dc.date.available 2017-08-28T07:08:22Z
dc.date.issued 2016 en
dc.description Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016. en
dc.description.abstract Heat transfer measurements for R254fa were conducted. The heat transfer coefficient was determined for a smooth stainless steel tube with an inner tube diameter of 3 mm. The experiments were conducted for five mass fluxes (100, 300, 500, 700 and 1000 kg=(m2 s)), three heat fluxes (10, 30 and 50W=m2) and at three saturation temperatures (40 C, 70 C and 125 C). The experiments were used to determine the influence of the saturation temperature, mass flux, heat flux and vapour quality on the heat transfer coefficient. At a low saturation temperature, the heat transfer coefficient increases with an increasing mass flux. However, at a high saturation temperature the heat transfer coefficient decreases with an increasing mass flux. Furthermore, the heat transfer coefficient increases with increasing vapour quality at a low saturation temperature. On the contrary, the heat transfer coefficient decreases at higher saturation temperatures.
dc.format.extent 6 pages en
dc.format.medium PDF en
dc.identifier.uri http://hdl.handle.net/2263/62013
dc.language.iso en en
dc.publisher HEFAT en
dc.rights University of Pretoria en
dc.subject Two-phase heat transfer measurements en
dc.subject High saturation temperatures en
dc.subject Horizontal minichannel en
dc.title Two-phase heat transfer measurements of r254fa at high saturation temperatures in horizontal mini-channels en
dc.type Presentation en


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