Design Equations of Flow Condensation in Smooth and Micro-fin Tubes with HCFC-22, HFC-134a and HFC-410 Refrigerants

被引：1
作者：
Tang, Liangyou [1 ]
Ohadi, Michael M. [2 ]
Johnson, Arthur T. [3 ]
机构：
[1] Outokumpu Copper Franklin Inc, 4720 Bowling Green Rd, Franklin, KY 42134 USA
[2] Univ Maryland, Dept Mech Engn, College Pk, MD 20742 USA
[3] Univ Maryland, Dept Biol Resources Engn, College Pk, MD 20742 USA
来源：
JOURNAL OF ENHANCED HEAT TRANSFER | 2017年 / 24卷 / 1-6期
关键词：
Alternative refrigerant; single-phase; flow condensation; micro-fin tube; heat transfer enhancement; correlation; HEAT-TRANSFER;
D O I：
10.1615/JEnhHeatTransf.v24.i1-6.50
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
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.
引用
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页码：85 / 99
页数：15
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