Two-phase heat transfer of HCFC-22 and HFC-134A in an enhanced tube

被引：0
|
作者：
Liu, X
机构：
来源：
HEAT TRANSFER SCIENCE AND TECHNOLOGY 1996 | 1996年
关键词：
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The condensing and evaporating heat transfer characteristics of HCFC-22 and one of its alternatives, an ozone friendly refrigerant HFC-134a, flowing inside a 9.5 mm (3/8 in) OD axially grooved tube with 1% oil were investigated experimentally. When compared to R-22 at the same refrigerant flaw rate, the condensing heat transfer coefficients for R-134a are 8% to 18% highs, and the evaporating heat-transfer coefficient is about the same with R-134A for mass velocity below 270 kg/m(2)-s and lower beyond that velocity, relative to R-22.
引用
收藏
页码：642 / 647
页数：6
相关论文
共 50 条
  • [1] Condensing and evaporating heat transfer and pressure drop characteristics of HFC-134a and HCFC-22
    Liu, X
    JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1997, 119 (01): : 158 - 163
  • [2] Global emissions of refrigerants HCFC-22 and HFC-134a: Unforeseen seasonal contributions
    Xiang, Bin
    Patra, Prabir K.
    Montzka, Stephen A.
    Miller, Scot M.
    Elkins, James W.
    Moore, Fred L.
    Atlas, Elliot L.
    Miller, Ben R.
    Weiss, Ray F.
    Prinn, Ronald G.
    Wofsy, Steven C.
    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2014, 111 (49) : 17379 - 17384
  • [3] Releases of refrigerant gases (CFC-12, HCFC-22 and HFC-134a) to the atmosphere
    McCulloch, A
    Midgley, PM
    Ashford, P
    ATMOSPHERIC ENVIRONMENT, 2003, 37 (07) : 889 - 902
  • [4] Tube-side two-phase heat transfer coefficients of refrigerant HFC-134a flowing through a fin-and-tube evaporator
    Wongwises, S
    Duangthongsuk, W
    Naphon, P
    INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2002, 29 (03) : 387 - 400
  • [5] Pressure-volume-temperature behavior of binary mixtures of hydrogen fluoride with HCFC-22, HFC-32 and HFC-134a
    Wilson, HL
    Wilding, WV
    FLUID PHASE EQUILIBRIA, 1998, 150 : 323 - 332
  • [6] INFRARED BAND STRENGTHS AND THEIR TEMPERATURE-DEPENDENCE OF THE HYDROHALOCARBONS HFC-134A, HFC-152A, HCFC-22, HCFC-123 AND HCFC-142B
    CAPPELLANI, F
    RESTELLI, G
    SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1992, 48 (08): : 1127 - 1131
  • [7] Two-phase evaporative heat transfer coefficients of refrigerant HFC-134a under forced flow conditions in a small horizontal tube
    Wongwises, S
    Disawas, S
    Kaewon, J
    Onurai, C
    INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2000, 27 (01) : 35 - 48
  • [8] Pressure-volume-temperature behavior of binary mixtures of hydrogen fluoride with HCFC-22, HFC-32 and HFC-134a
    Wilson, Howard L.
    Wilding, W. Vincent
    Fluid Phase Equilibria, 1998, 150 (151): : 323 - 332
  • [9] Experimental Results of Flow Condensation in Smooth and Micro-fin Tubes with HCFC-22, HFC-134a and HFC-410A Refrigerants
    Tang, Liangyou
    Ohadi, Michael M.
    Johnson, Arthur T.
    JOURNAL OF ENHANCED HEAT TRANSFER, 2017, 24 (1-6) : 63 - 84
  • [10] Design Equations of Flow Condensation in Smooth and Micro-fin Tubes with HCFC-22, HFC-134a and HFC-410 Refrigerants
    Tang, Liangyou
    Ohadi, Michael M.
    Johnson, Arthur T.
    JOURNAL OF ENHANCED HEAT TRANSFER, 2017, 24 (1-6) : 85 - 99
12345