制冷学报Issue(5)：22-29,8.DOI:10.3969/j.issn.0253-4339.2015.05.022
R290和R22在水平细圆管内流动凝结换热的实验研究
Experimental Study on the Flow Condensation Heat Transfer of R290 and R22 in a Horizontal Circular Minitube
摘要
Abstract
The condensation heat transfer characteristics of R290 and R22 were investigated experimentally in a horizontal circular mini-tube with 1. 085 mm diameter. The mass flow rate of R22 is 200-1200 kg/(m2•s), and that of R290 is 200-650 kg/(m2•s). The saturation temperature is 40 ℃ and 50 ℃ respectively during the experiment. The experimental results show that at the higher mass flow rate of R22, the condensation heat transfer coefficient increases slowly or even decreases little with the vapor quality increasing, for the R290 at a less mass flow rate, the heat transfer coefficient will decreases slightly at a low vapor quality. The condensation heat transfer co-efficient of R290 is higher than that of the R22 at the same experimental conditions. The experimental results are also compared with some of the existing correlations, which shows that the Wang et al. (2002) correlation predicts the experimental data of R290 very well ,with an overall mean absolute error of 17. 5%, while Kim et al. (2013) correlation makes the best prediction to the R22’s data, with an overall mean absolute error of 18. 4%.关键词
微细通道/流动凝结/对流换热/R290Key words
minichannel/flow condensation/convective heat transfer/R290分类
能源科技引用本文复制引用
肖航,李俊明..R290和R22在水平细圆管内流动凝结换热的实验研究[J].制冷学报,2015,(5):22-29,8.基金项目
国家自然科学基金创新研究群体项目(51321002)、环境保护部环境保护对外合作项目和国家科技支撑计划项目(2012BAA13B02)资助。(The project was supported by the Science Fund for Creative Research Groups of the National Natural Science Founda-tion of China ( No.51321002), the Foreign Economic Cooperation Office ( FECO), Ministry of Environmental Protection of China and Key Technolo-gies R&D Program of China (No.2012BAA13B02).) （51321002）
