Reverse heat transfer and re-condensation phenomena in non-adiabatic capillary tubes

被引：29

作者：

Bansal, PK ^{[1
]}

Yang, C ^{[1
]}

机构：

[1] Univ Auckland, Dept Mech Engn, Auckland 1, New Zealand

来源：

APPLIED THERMAL ENGINEERING | 2005年 / 25卷 / 17-18期

关键词：

non-adiabatic capillary tube; suction line heat exchanger; simulation model; re-condensation; reverse heat transfer;

D O I：

10.1016/j.applthermaleng.2005.03.005

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A numerical simulation model for lateral capillary tube-suction line heat exchangers is presented here to analyze its performance characteristics in small vapour compression refrigeration systems (e.g. domestic refrigerators). Appropriate heat transfer correlations have been used to illustrate the reverse heat transfer and re-condensation phenomena inside the tubes. Some convergence problems were encountered during the execution of the model when lower vapour temperature inside the suction line caused the two-phase refrigerant inside the capillary tube to re-condense within the heat exchange region. Therefore, a relationship between the re-condensation phenomenon and the divergence problem has been analyzed in the paper. The modelling was performed with two refrigerants, namely HFC-134a and HC-600a. Further, a simple theoretical equation has been developed to express the re-condensation phenomenon in non-adiabatic capillary tubes. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：3187 / 3202

页数：16

共 14 条

[1]

[Anonymous], 1984, ASHRAE T

[2] A parametric study of refrigerant flow in non-adiabatic capillary tubes [J].

Bansal, PK ;

Xu, B .

APPLIED THERMAL ENGINEERING, 2003, 23 (04) :397-408

[3] An homogeneous model for adiabatic capillary tubes [J].

Bansal, PK ;

Rupasinghe, AS .

APPLIED THERMAL ENGINEERING, 1998, 18 (3-4) :207-219

[4]

Bittle RR, 1995, ASHRAE TRAN, V101, P124

[5]

CHURCHILL SW, 1977, CHEM ENG-NEW YORK, V84, P91

[6]

GNIELINSKI V, 1976, INT CHEM ENG, V16, P359

[7]

Inan C., 1994, P 1994 INT REFR C PU, P365

[8] LOCAL FRICTIONAL PRESSURE-DROP DURING VAPORIZATION OF R-12 THROUGH CAPILLARY TUBES [J].

LIN, S ;

KWOK, CCK ;

LI, RY ;

CHEN, ZH ;

CHEN, ZY .

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 1991, 17 (01) :95-102

[9] A GENERAL CORRELATION FOR SATURATED AND SUBCOOLED FLOW BOILING IN TUBES AND ANNULI, BASED ON A NUCLEATE POOL BOILING EQUATION [J].

LIU, Z ;

WINTERTON, RHS .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1991, 34 (11) :2759-2766

[10]

NEGRAO COR, 1999, 20 INT C REFR IIR II

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