CFD modelling of a two-phase closed thermosyphon charged with R134a and R404a

被引：148

作者：

Fadhl, Bandar ^{[1
,3
]}

Wrobel, Luiz C. ^{[1
]}

Jouhara, Hussam ^{[2
]}

机构：

[1] Brunel Univ London, Coll Engn Design & Phys Sci, Inst Mat & Mfg, Uxbridge UB8 3PH, Middx, England

[2] Brunel Univ London, Coll Engn Design & Phys Sci, Inst Energy Futures, RCUK Ctr Sustainable Energy Use Food Chains CSEF, Uxbridge UB8 3PH, Middx, England

[3] Umm Al Qura Univ, Dept Mech Engn, Mecca, Saudi Arabia

来源：

APPLIED THERMAL ENGINEERING | 2015年 / 78卷

基金：

英国工程与自然科学研究理事会;

关键词：

Two-phase thermosyphon; Computational fluid dynamics (CFD); Phase change material; Pool boiling; Liquid film condensation; R134a; R404a; HEAT-PIPE; PERFORMANCE; SIMULATION; CONVECTION; WATER;

D O I：

10.1016/j.applthermaleng.2014.12.062

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper examines the application of CFD modelling to simulate the two-phase heat transfer mechanisms in a wickless heat pipe, also called a thermosyphon. Two refrigerants, R134a and R404a, were selected as the working fluids of the investigated thermosyphon. A CFD model was built to simulate the details of the two-phase flow and heat transfer phenomena during the start-up and steady-state operation of the thermosyphon. The CFD simulation results were compared with experimental measurements, with good agreement obtained between predicted temperature profiles and experimental temperature data, thus confirming that the CFD model was successful in reproducing the heat and mass transfer processes in the R134a and R404a charged thermosyphon, including the pool boiling in the evaporator section and the liquid film in the condenser section. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：482 / 490

页数：9

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