RT Journal Article
ID 72f500283c0391e6
A1 Tang, Liangyou
A1 Ohadi, Michael M.
A1 Johnson, Arthur T.
T1 DESIGN EQUATIONS OF FLOW CONDENSATION IN SMOOTH AND MICRO-FIN TUBES WITH HCFC-22, HFC-134A AND HFC-410 REFRIGERANTS
JF Journal of Enhanced Heat Transfer
JO JEH(T)
YR 2017
FD 2018-04-23
VO 24
IS 1-6
SP 107
OP 122
K1 Alternative refrigerant
K1 single-phase
K1 flow condensation
K1 micro-fin tube
K1 heat transfer enhancement
K1 correlation
AB 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.
PB Begell House
LK https://www.dl.begellhouse.com/journals/4c8f5faa331b09ea,7c902f7e71298fc5,72f500283c0391e6.html