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Flow Boiling of R141b on Externally Sintered High-Flux Tubes

摘要:The sintered high-flux tube is an innovative heat transfer element that exhibits enhanced heat transfer capabilities. It is capable of inducing vigorous nuclear boiling even at low wall superheat conditions, thereby facilitating the efficient heat transfer of the working medium. In order to investigate the impact of a sintered porous layer on the characteristics of flow boiling heat transfer, this study conducted experimental research on externally sintered high-flux tubes. The tubes had an outer diameter of 25 mm, a coating thickness of 0.3 mm, and porosities of 65% and 75% respectively. The experimental working medium used in this study was refrigerant R141b. The results indicate that, when subjected to identical wall superheat conditions, the high-flux tube exhibits a substantial increase in wall heat flux compared to the smooth tube. Furthermore, it is observed that the high-flux tube with greater porosity demonstrates an even higher wall heat flux. Increasing the porosity of the high-flux tube has been found to have a positive effect on the number of vaporized cores and the frequency of bubble detachment. However, it should be noted that when the heating wall temperature reaches a certain threshold, the bubbles are unable to escape from the porous layer and instead form a localized vapor film. This phenomenon ultimately leads to a decrease in the heat transfer coefficient of the high-flux tube. 漏 2024 Science Press. All rights reserved.

ISSN号:0253-231X

卷、期、页:v 45,n 8,p2389-2395

发表日期:2024-08-01

收录情况:EI(工程索引)

发表期刊名称:Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics

参与作者:叶晶,揭涛

通讯作者:赵学智

第一作者:王科

论文类型:期刊论文

论文概要:王科,赵学智,叶晶,揭涛,Flow Boiling of R141b on Externally Sintered High-Flux Tubes,Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics,2024,v 45,n 8,p2389-2395

论文题目:Flow Boiling of R141b on Externally Sintered High-Flux Tubes

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