Condensation heat transfer of R22 and R410A in horizontal smooth and microfin tubes

被引：60

作者：

Kim, MH ^{[1
]}

Shin, JS ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mech Engn, Taejon 305701, South Korea

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2005年 / 28卷 / 06期

关键词：

experiment; heat transfer; condensation; R22; R410A; smooth tube; microfin tube;

D O I：

10.1016/j.ijrefrig.2005.01.017

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental investigation of condensation heat transfer in 9.52 mm O.D. horizontal copper tubes was conducted using R22 and R410A. The test rig had a straight, horizontal test section with an active length of 0.92 m and was cooled by the heat transfer fluid (cold water) circulated in a surrounding annulus. Constant heat nux of 11.0 kW/m(2) was maintained throughout the experiment and refrigerant quality varied from 0.9 to 0.1. The condensation test results at 45 degrees C were reported for 40-80 kg/h mass flow rate. The local and average condensation coefficients for seven microfin tubes were presented compared to those for a smooth tube. The average condensation coefficients of R22 and R410A for the microfin tubes were 1.7-3.19 and 1.7-2.94 times larger than those in smooth tube, respectively. (C) 2005 Elsevier Ltd and IIR. All rights reserved.

引用

页码：949 / 957

页数：9

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