Experimental study of convective condensation in an inclined smooth tube. Part II : inclination effect on pressure drops and void fractions
| dc.contributor.author | Lips, Stephane | |
| dc.contributor.author | Meyer, Josua P. | |
| dc.contributor.email | josua.meyer@up.ac.za | en_US |
| dc.date.accessioned | 2012-03-19T06:18:15Z | |
| dc.date.available | 2012-03-19T06:18:15Z | |
| dc.date.issued | 2012-01 | |
| dc.description.abstract | This article is the second part of a two-part paper, dealing with an experimental study of convective condensation of R134a at a saturation temperature of 40 C in an 8.38 mm inner diameter smooth tube in inclined orientations. The first part concentrates on the flow pattern and the heat transfer coefficients. This second part presents the pressures drops in the test condenser for different mass fluxes and different vapour qualities for the whole range of inclination angles (downwards and upwards). Pressures drops in a horizontal orientation were compared with correlations available in literature. In a vertical orientation, the experimental results were compared with pressure drop correlations associated with void fraction correlations available in literature. A good agreement was found for vertical upward flows but no correlation predicted correctly the measurements for downward flows. An apparent gravitational pressure drop and an apparent void fraction were defined in order to study the inclination effect on the flow. For upward flows, it seems as if the void fraction and the frictional pressure drop are independent of the inclination angle. Apparent void fractions were successfully compared with correlations in literature. This was not the case for downward flows. The experimental results for stratified downward flows were also successfully compared with the model of Taitel and Dukler | en_US |
| dc.description.sponsorship | The NRF, TESP, University of Stellenbosch/University of Pretoria, SANERI/SANEDI, CSIR, EEDSM Hub and NAC. | en_US |
| dc.description.uri | http://www.elsevier.com/locate/ijhmt | en_US |
| dc.identifier.citation | Stephane Lips & J.P. Meyer, Experimental study of convective condensation in an inclined smooth tube. Part II : inclination effect on pressure drops and void fractions, International Journal of Heat and Mass Transfer (2012), 10.1016/j.ijheatmasstransfer.2011.09.034. | en_US |
| dc.identifier.issn | 0017-9310 (print) | |
| dc.identifier.issn | 1879-2189 (online) | |
| dc.identifier.other | 10.1016/j.ijheatmasstransfer.2011.09.034 | |
| dc.identifier.uri | http://hdl.handle.net/2263/18468 | |
| dc.language.iso | en | en_US |
| dc.publisher | Elsevier | en_US |
| dc.rights | © 2011 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in International Journal of Heat and Mass Transfer. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Heat and Mass Transfer (2012), 10.1016/j.ijheatmasstransfer.2011.09.034. | en_US |
| dc.subject | Convective condensation | en_US |
| dc.subject | Inclined two-phase flow | en_US |
| dc.subject | Pressure drop | en_US |
| dc.subject | Void fraction | en_US |
| dc.title | Experimental study of convective condensation in an inclined smooth tube. Part II : inclination effect on pressure drops and void fractions | en_US |
| dc.type | Postprint Article | en_US |