Numerical analysis of choked refrigerant flow in adiabatic capillary tubes

被引：44

作者：

Bansal, PK ^{[1
]}

Wang, G ^{[1
]}

机构：

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

来源：

APPLIED THERMAL ENGINEERING | 2004年 / 24卷 / 5-6期

关键词：

choked flow; fanno flow; metastable flow; capillary tube; homogeneous model; refrigerators; R134a; R600a;

D O I：

10.1016/j.applthermaleng.2003.10.010

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper presents a homogeneous simulation model for choked flow conditions for pure refrigerants (R134a, R600a) in adiabatic capillary tubes. The model is based on the first principles of thermodynamics and fluid mechanics and some empirical relations. This study presents a fresh-look at the classical fluid flow problem, known as 'Fanno flow' for refrigerant flow in capillary tubes. A new diagram called the full range simulation diagram has been developed that presents a better way to understand the choked flow phenomenon graphically. The diagram is useful for design and analysis of refrigerant flow in capillary tubes. The model has been validated with published experimental data for R22, R134a and R600a and is found to agree to within +/-7%. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：851 / 863

页数：13

共 8 条

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

Bansal, PK ;

Rupasinghe, AS .

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

[2]

CHEN ZH, 1990, ASHRAE TRAN, V96, P550

[3]

Chung M., 1998, ASHRAE T, V104, P1031

[4]

DIRIK E, 1994, INT REGR C PURD PURD

[5] Numerical simulation of capillary-tube expansion devices behaviour with pure and mixed refrigerants considering metastable region.: Part II:: experimental validation and parametric studies [J].

García-Valladares, O ;

Pérez-Segarra, CD ;

Oliva, A .

APPLIED THERMAL ENGINEERING, 2002, 22 (04) :379-391

[6]

Klein S.A., 1992, Engineering Equation Solver

[7] An experimental analysis of adiabatic capillary tubes [J].

Melo, C ;

Ferreira, RTS ;

Neto, CB ;

Gonçalves, JM ;

Mezavila, MM .

APPLIED THERMAL ENGINEERING, 1999, 19 (06) :669-684

[8]

WOLF DA, 1995, ERI95413 ASHRAE PROJ

← 1 →