Experimental evaluation of R22 and R407C evaporative heat transfer coefficients in a vapour compression plant

被引：37
作者：
Aprea, C
de Rossi, F
Greco, A
机构：
[1] Univ Naples Federico II, DETEC, I-80125 Naples, Italy
[2] Univ Sannio, Fac Ingn, Benevento, Italy
[3] Univ Salerno, Dipartimento Ingn Meccan, I-84084 Salerno, Italy
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2000年 / 23卷 / 05期
关键词：
heat transfer; mass transfer; evaporation; horizontal tube; counterflow; ring tube; R22; R407C;
D O I：
10.1016/S0140-7007(99)00068-7
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The mean heat transfer coefficients of R22 and R407C in the coaxial counterflow evaporator (20 mm ID) of a refrigerating vapour compression plant have been experimentally measured. The experimental conditions under which heat transfer coefficients were determined reflect a typical working situation for small-scale refrigeration systems. The heat flux ranged from 1.9 to 9.1 kW/m(2) and the mass flux was varied from 30 to 140 kg/m(2) s. The results illustrate that the R22 heat transfer coefficient is always greater than that of R407C. Furthermore, a comparison carried out between the experimental data and those predicted by means of the most credited literature relationships showed a strongly overprediction for R407C coefficients. (C) 2000 Elsevier Science Ltd and IIR. All rights reserved.
引用
收藏
页码：366 / 377
页数：12
相关论文
共 41 条
  • [1] [Anonymous], 1983, INT CHEM ENG
  • [2] [Anonymous], 1989, HEAT TRANSFER ENG, DOI DOI 10.1080/01457638908939696
  • [3] Bennet D.L., 1980, AICHE J, V21, P721
  • [4] CORRELATION FOR BOILING HEAT TRANSFER TO SATURATED FLUIDS IN CONVECTIVE FLOW
    CHEN, JC
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1966, 5 (03): : 322 - &
  • [5] Cooper M. G., 1984, First U.K. National Conference on Heat Transfer, P785
  • [6] Dittus F.W., 1930, University of California Publications in Engineering, V2, P443, DOI DOI 10.1016/0735-1933(85)90003-X
  • [7] DYNAMICS OF VAPOR BUBBLES AND BOILING HEAT TRANSFER
    FORSTER, HK
    ZUBER, N
    [J]. AICHE JOURNAL, 1955, 1 (04) : 531 - 535
  • [8] Replacement of R22 in tube-and-shell condensers: Experiments and simulations
    Gabrielii, C
    Vamling, L
    [J]. INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 1997, 20 (03): : 165 - 178
  • [9] GOTO M, 1995, P 19 INT C REFR A, V4, P246
  • [10] Greco A, 1997, INT J ENERG RES, V21, P1087, DOI 10.1002/(SICI)1099-114X(19971010)21:12<1087::AID-ER330>3.0.CO
12345