Theoretical Analysis and Experimental Investigation on Local Heat Transfer Characteristics of HFC-134a Forced-Convection Condensation inside Smooth Horizontal Tubes
作者:
Pei-Wen Li, Min Chen, Wen-Quan Tao,
期刊:
Heat Transfer Engineering
(Taylor Available online 2000)
卷期:
Volume 21,
issue 6
页码: 34-43
ISSN:0145-7632
年代: 2000
DOI:10.1080/01457630050194799
出版商: Informa UK Ltd
数据来源: Taylor
摘要:
An improved analysis model is presented for predicting the local heat transfer coefficient of forced condensation in the annular flow region inside smooth horizontal tubes. Heat transfer experiments for R-12 and R-134a are conducted inside a condensing tube with an inner diameter of 11 mm and a length of 13 m. The mass flux ranged from 200 to 510 kg/m2s, and the vapor qualities varied from 1.0 to 0.0. Compared with the experimental data, the numerical results have a deviation of not more than 20% and 25% for 80% of the total 47 points of R-12 and 88% of the total 226 points of R-134a, respectively.
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