轻工机械2018，Vol.36Issue(2)：25-30,35,7.DOI:10.3969/j.issn.1005-2895.2018.02.005
R134a在螺纹管内冷凝换热及压降特性
Condensation Heat Transfer and Pressure Drop Performance of R134a in Inner-Grooved Tubes
摘要
Abstract
To investigate the effects of condensation temperature and diameter of inner-grooved tubes on flow evaporation and condensation performance of R134a, three kinds of inner-grooved tubes with different diameter (6.35,7.00 and 8.00 mm) were tested at different condensing temperatures (35, 40 and 45 ℃).The effects of condensation temperature,diameter and mass flow rate on heat transfer characteristics and pressure drop were investigated.The experimental results show that: the lower the condensation temperature, the higher the heat transfer coefficient of the refrigerant side and the greater the pressure drop.The tube with diameter of 6.35 mm has the greatest heat transfer coefficient of the refrigerant side and the greatest pressure drop.However,it has the greatest condensation heat transfer coefficient per unit drop(μ=hr/△P) and the best comprehensive performance.关键词
换热器/螺纹管/换热系数/压降/冷凝温度Key words
heat exchanger/thread pipe/heat transfer coefficient/pressure drop/condensation temperature分类
能源科技引用本文复制引用
毛舒适,陶乐仁,李庆普,吴生礼,张丹亭..R134a在螺纹管内冷凝换热及压降特性[J].轻工机械,2018,36(2):25-30,35,7.基金项目
上海市动力工程多相流动与传热重点实验室开放基金项目(13DZ2260900). （13DZ2260900）
