Condensation of ternary low GWP zeotropic mixtures inside channels

被引：42

作者：

Azzolin, Marco ^{[1
]}

Berto, Arianna ^{[1
]}

Bortolin, Stefano ^{[1
]}

Moro, Lorenzo ^{[1
]}

Del Col, Davide ^{[1
]}

机构：

[1] Univ Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2019年 / 103卷

关键词：

Condensation; Zeotropic mixtures; Pressure drop; Heat transfer; FRICTIONAL PRESSURE-DROP; HEAT-TRANSFER MODEL; HORIZONTAL TUBES; FLOW; MINICHANNELS; REFRIGERANTS; R410A; R404A; PUMPS; R134A;

D O I：

10.1016/j.ijrefrig.2019.03.021

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The condensation heat transfer coefficient and two-phase frictional pressure drop of ternary zeotropic mixtures R455A (R32, R1234yf and R744 at 21.5/75.5/3.0% by mass composition) and R452B (R32, R1234yf and R125 at 67.0/26.0/7.0% by mass composition) have been measured inside a minichannel (0.96 mm diameter) and a conventional tube (8.0 mm diameter). The effects of tube diameter, mass velocity, vapor quality and saturation-to-wall temperature difference have been investigated. A comparison between the experimental data of the tested mixtures and the condensation heat transfer of the pure components R32 and R1234yf has been performed. The two-phase pressure drop and condensation heat transfer data are compared to predictions of correlations available in the literature. In the prediction of the heat transfer coefficient, the models are adapted to account for the additional mass transfer resistance occurring during condensation of zeotropic mixtures. (C) 2019 Elsevier Ltd and IIR. All rights reserved.

引用

页码：77 / 90

页数：14

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