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Condensation Heat Transfer Coefficients of Binary Refrigerant Mixtures on Enhanced Tubes  

김경기 (인하대학교 대학원)
서강태 (인하대학교 대학원)
채순남 (인하대학교 대학원)
정동수 (인하대학교 기계공학과)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.14, no.2, 2002 , pp. 161-167 More about this Journal
Abstract
In this study, external condensation heat transfer coefficients (HTCs) of two non-azeotropic refrigerant mixtures of HFC32/HFC134a and HF0134a/HCF0123 at various compositions were measured on both low fin and Turbo-C enhanced tubes of 19.0 mm outside diameter All data were taken at the vapor temperature of 39$^{\circ}C$ with a wall subcooling of 3- 8 K. Test results showed that HTCs of the tested mixtures on the enhanced tubes were much lower than the ideal values calculated by the mass fraction weighting of the pure compo- nents'HTCs. Also the reduction of HTCs due to the diffusion vapor film was much larger than that of a plain tube. Unlike HTCs of pure fluids, HTCs of the mixtures measured on enhanced tubes increased as the wall subcooling increased, which was due to the sudden break up of the vapor diffusion film with an increase in wall subcooling. Finally, heat transfer enhancement ratios for mixtures were found to be much lower than those of pure fluids.
Keywords
Condensation heat transfer; Binary refrigerant mixture; Non-azeotropic mixture; Enhanced tube;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Effect of fin spacing on the performance of horizontal integral fin condenser tubes /
[ Yau K.K;Cooper J.R;Rose J.W ] / Journal of Heat Transfer
2 /
[ McLinden M.O;Klein S.A;Lemmon E.W;Peskin A.P ] / NIST thermodynamics and transport properties of refrigerants and refrigerant mixtures-REFPROP(Version 6.0)
3 Describing uncertainties in single-sample experiments /
[ Kline S.J;McClintock F.A ] / Mechanical Engineers
4 Free convective filmwise condensation of a binary mixture of vapors /
[ Hijikata K;Mori Y;Himeno N;Inagawa M;Takahasi K ] / Proceedings,Int.8th Heat Transfer Conference
5 Condensation of freon binary mixture outside a bundle of tubes /
[ Signe J.C;Bonremps A;Marvillet Ch ] / 2nd European Thermal-Sciences and 14th UIT National Heat Transfer Conference
6 Row Effect for R-11 condensation on enhanced tubes /
[ Webb R.L;Murawski C.G ] / Transactions of the ASME
7 Condensation heat transfer coefficients of binary refrigerant mixtures on a horizontal smooth tube /
[ Kim K.K;Seo K.T;Jung D ] / Korean Journal of Air-conditioning and Refrigeration Engineering   과학기술학회마을
8 An experimental study on the condensation heat transfer of low-finned tubes /
[ Kim N.H;Jung I.K;Kim K.H ] / Korean Journal of Air-conditioning and Refrigeration Engineering
9 condensation heat transfer coefficients of enhanced tubes with alternative refrigerants for CFC11 and CFC12 /
[ Jung D.Kim;C.B;Cho S.;Song K ] / Int.J.Refrigeration   ScienceOn
10 Condensation heat transfer coefficients of R22 alternative refrigerants on enhanced tubes /
[ Hwang S.M;Kim K.K;Jung D;Kim C.B ] / Transactions of the Korean Society of Mechanical Engineers B   과학기술학회마을
11 Film condensation of R-11 vapor on single horizontal enhanced condenser tubes /
[ Sukhatme S.P;Jagadish B.S;Prabhakran P ] / Journal of Heat Transfer
12 Experimental measurements for condensation of downward flowing R123/R134a in a staggered bundle of horizontal low-finned tubes with four fin geometries /
[ Honda H;Takamatsu N;Takata N ] / Int.J.Refrigeration   ScienceOn
13 An analytical model to predict condensate retention on horizontal integral-fin tubes /
[ Ruddy T.M;Webb R.L ] / Journal of Heat Transfer
14 Condensation heat transfer coefficients of CFC11 and its alternative refrigerants /
[ Joo J.K;Cho S.J;Jung D;Kim C.B ] / Journal of KSME   과학기술학회마을
15 Montreal protocol on substances that deplete the ozone Layer /
[] / Final Act.
16 Replacement of R22 in tube-and-shell condensers:experiments and simulations /
[ Gabruelii C;Vamling L ] / Int.J.Refrigeration   ScienceOn
17 Condensation of vapors on outside of finned tubes /
[ Beatty K.O;Katz D.L ] / Chemical Engineering Progress