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New experimental approach on the determination of condensation heat transfer coefficient using frictional pressure drop and void fraction models in a vertical tube

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dc.contributor.authorDalkilic, A. S.
dc.contributor.authorWongwises, S.
dc.contributor.institutionauthorDALKILIÇ, Ahmet Selim
dc.date.accessioned2026-06-27T12:52:00Z
dc.date.issued2010
dc.description.abstractThe comparison of 35 void fraction and 13 two-phase frictional pressure drop models and correlations with experimental results for the condensation of R134a in a 0.5 m vertical copper tube with an inner diameter of 8.1 mm and outer diameter of 9.52 mm are presented. The most predictive ones having a relation with the heat transfer coefficient at different vapor qualities (0.69-0.96). various mass fluxes (260 and 515 kg m(-2) s(-1)), and different condensing temperatures (40 and 50 degrees C) are proposed. Three of 13 models belonging to the determination of two-phase frictional pressure drop and 8 of 35 models belonging to the determination of void fraction are found to be in good agreement, predicting the condensation heat transfer coefficient by means of von Karman's universal velocity distribution and Kosky-Staub's annular flow film thickness model with their deviations being within the range of +/- 30% for all tested conditions. (C) 2010 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipYildiz Technical University (YTU)
dc.description.sponsorshipKing Mongkut's University of Technology Thonburi (KMUTT)
dc.description.sponsorshipThailand Research Fund
dc.description.urihttps://doi.org/10.1016/j.enconman.2010.05.019
dc.identifier.doi10.1016/j.enconman.2010.05.019
dc.identifier.eissn1879-2227
dc.identifier.endpage2547
dc.identifier.issn0196-8904
dc.identifier.issue12
dc.identifier.startpage2535
dc.identifier.urihttps://hdl.handle.net/20.500.14981/47619
dc.identifier.volume51
dc.identifier.wos000281339700019
dc.language.isoeng
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofENERGY CONVERSION AND MANAGEMENT
dc.subjectTwo-phase flow
dc.subjectCondensation
dc.subjectPressure drop
dc.subjectHeat transfer coefficient
dc.subjectR134a
dc.subjectADIABATIC 2-PHASE FLOW
dc.subjectHIGH-MASS FLUX
dc.subjectDOWNWARD FLOW
dc.subjectFILM CONDENSATION
dc.subjectAIR-WATER
dc.subjectSMOOTH
dc.subjectREFRIGERANTS
dc.subjectPREDICTION
dc.subjectCHANNELS
dc.subjectThermodynamics
dc.subjectEnergy & Fuels
dc.subjectMechanics
dc.titleNew experimental approach on the determination of condensation heat transfer coefficient using frictional pressure drop and void fraction models in a vertical tube
dc.typeArticle
dspace.entity.typePublication
local.import.sourceWOS

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