Friction factor and heat transfer coefficient of R134a liquid flow in mini-channels

被引：59

作者：

Agostini, B

Watel, B

Bontemps, A

Thonon, B

机构：

[1] CEA Grenoble, GRETh, F-38054 Grenoble, France

[2] ADEME, F-49004 Angers, France

[3] Univ Grenoble 1, LEGI, GRETh, F-38054 Grenoble, France

来源：

APPLIED THERMAL ENGINEERING | 2002年 / 22卷 / 16期

关键词：

mini-channels; friction factor; heat transfer coefficient; air-conditioning; compact heat exchanger;

D O I：

10.1016/S1359-4311(02)00108-4

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This article presents an experimental study of friction factor and heat transfer coefficient for a vertical liquid up-flow of R134a. A flat aluminium multiport extruded tube composed of 11 parallel rectangular channels (3.28 mm x 1.47 mm) with hydraulic diameter of 2.01 mm was used. Mass flux ranges from 28 to 800 kg m(-2) s(-1) and heat flux from 0.84 to 22 kW m(-2). Working pressure is around 2000 kPa and inlet subcooling around 70 K. The results were compared with those found in the literature for conventional tubes and mini-channels, and discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1821 / 1834

页数：14

共 25 条

[1] An experimental investigation of single-phase forced convection in microchannels [J].