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Journal of Enhanced Heat Transfer
Импакт фактор: 0.562 5-летний Импакт фактор: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Печать: 1065-5131
ISSN Онлайн: 1026-5511

Выпуски:
Том 26, 2019 Том 25, 2018 Том 24, 2017 Том 23, 2016 Том 22, 2015 Том 21, 2014 Том 20, 2013 Том 19, 2012 Том 18, 2011 Том 17, 2010 Том 16, 2009 Том 15, 2008 Том 14, 2007 Том 13, 2006 Том 12, 2005 Том 11, 2004 Том 10, 2003 Том 9, 2002 Том 8, 2001 Том 7, 2000 Том 6, 1999 Том 5, 1998 Том 4, 1997 Том 3, 1996 Том 2, 1995 Том 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v24.i1-6.50
pages 85-100

DESIGN EQUATIONS OF FLOW CONDENSATION IN SMOOTH AND MICRO-FIN TUBES WITH HCFC-22, HFC-134A AND HFC-410 REFRIGERANTS

Liangyou Tang
Outokumpu Copper Franklin, Inc., 4720 Bowling Green Road, Franklin, KY 42134
Michael M. Ohadi
Small and Smart Thermal Systems Laboratory, Center for Energy Environmental Engineering, Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, USA
Arthur T. Johnson
Department of Biological Resources Engineering, University of Maryland, College Park, MD 20742

Краткое описание

An empirical study of single-phase convection and flow condensation heat transfer in horizontal tubes was conducted. Three refrigerants (HCFC-22, HFC-134a and HFC-410A), a smooth tube, and three micro-fin tubes (axial, helical and Crosshatch enhancement) were examined. Commonly cited correlations were evaluated, utilizing the experimental data obtained in Part I of this study. Although these correlations had fairly good agreement with HCFC-22 and HFC-134 results, all of them failed to predict HFC-410A performance. A modified Shah equation was developed for smooth tube annular flow condensation, which overcomes the shortcomings of the existing correlations. Furthermore, design equations were developed for single-phase heat transfer and two-phase condensation with all three micro-fin tubes investigated, and covering all three refrigerants tested.


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