Dropwise Condensation Heat Transfer of Steam on a Polytethefluoroethylene Film

作     者：MaXuehu TaoBai 等 

作者机构：InstituteofChemicalEngineeringDalianUniversityofTechnologyDalian116012China InstituteofChemicalEng 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2001年第10卷第3期

页      面：247-253页

核心收录：

学科分类：080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：the Nahonal NaedScience Foundation of China (No.599060()2) and the Scienhficresereh FOundahon for the Retwed Oversea Chinese 

主　　题：dropwise condensation polymer film steam temperature effect temperature fluctuation. 

摘      要：Excellent dropwise condensation of steam was observed on a polytethefluoroethylene (PTFE) coated plate. The experimental results indicated that the condensation heat transfer performance was increased by 30 to 47 times when compared with film condensation values at the same surface subcooling degrees. The random fluctuation of the surface temperature was resulted from the high thermal conductivity of the copper substrate and the ultra thin coated polymer film with lower surface free energy. The effect of the steam temperature for pressures near atmospheric pressure on the dropwise condensation heat transfer characteristics was investigated as well.