制冷学报2017，Vol.38Issue(3)：36-42,7.DOI:10.3969/j.issn.0253-4339.2017.03.036
R32水平单管内的蒸发换热特性
Evaporation Heat Transfer of R32 inside Horizontal Tubes
摘要
Abstract
This paper studies the evaporation heat transfer of R32 inside two different diameters of horizontal tubes under saturation tem-peratures of 0℃, 5℃, and 10℃. The evaporation heat transfer coefficient of the refrigerant was obtained by using a heat resistance sep-arating method. Taking mass flux and saturation temperature as the influencing factors, the experiment results include two parts:analysis of single-tube thermal resistance and evaluation of single-tube comprehensive performance. The experimental results indicate that the heat transfer coefficient and pressure drop rise as the mass flux rate increases. The diameter has a great influence on the heat transfer coeffi-cient, and the heat transfer coefficient of No. 1 is 1. 1~1. 3 times as that of No. 2. The effect of temperature on the heat transfer coeffi-cient and the pressure drop differs under different mass flux rate. As the mass flux rate increases, the proportion of the external water side-tube resistance to the total thermal resistance increases, while that of the inside gradually decreases. The heat transfer coefficient per pres-sure drop of two single tubes decreases as the mass flux rate increases. The saturation temperature shows various effects on the parameters at different mass flux rate.关键词
蒸发换热/质量流量/饱和温度/热阻分析/综合性能评价Key words
evaporation heat transfer/mass flux/saturation temperature/thermal resistance analysis/evaluation of comprehensive performance分类
通用工业技术引用本文复制引用
李庆普,陶乐仁,王通,吴生礼,李垒,胡永攀..R32水平单管内的蒸发换热特性[J].制冷学报,2017,38(3):36-42,7.基金项目
本文受上海市动力工程多相流动与传热重点实验室开放基金(13DZ2260900)项目资助. ( The project was supported by Opening Project of Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering(No. 13DZ2260900). ) （13DZ2260900）
