Experimental two-phase heat transfer coefficient and frictional pressure drop inside mini-channels during condensation with R1234yf and R134a

被引：78

作者：

Illan-Gomez, F. ^{[1
]}

Lopez-Belchi, A. ^{[1
]}

Garcia-Cascales, J. R. ^{[1
]}

Vera-Garcia, F. ^{[1
]}

机构：

[1] Tech Univ Cartagena, Dept Thermal & Fluids Engn, Cartagena 30202, Spain

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2015年 / 51卷

关键词：

Minichannels; Two phase flow condensation; Frictional pressure gradient; HTC; FLOW;

D O I：

10.1016/j.ijrefrig.2014.11.014

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The present paper reports condensing two-phase flow pressure drop gradient and heat transfer coefficient (HTC) inside a mini-channel multiport tube with R1234yf and R134a. Several models available in the literature are used to compare predictions of these two fluids. Experimental data are analysed to get the influence of saturation temperature, mass flux, vapour quality and fluid properties. HTC values of R1234yf seem to be lower than R134a under similar conditions. Two-phase flow pressure drops are also lower in the case of the new refrigerant R1234yf. (C) 2014 Elsevier Ltd and IIR. All rights reserved.

引用

页码：12 / 23

页数：12

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