用电化学方法研究水平管束核沸腾传热的强化机理  

The Investigation of Mechanism of Nucleate Boiling Heat Transfer Enhancement on a Tube Bundle by Electrodiffusion Technique

作　　者：贾岫庄[1] 沈自求[1] 

机构地区：[1]大连理工大学化学工程研究所

出　　处：《高校化学工程学报》1990年第1期50-57,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金

摘　　要：本文采用电化学方法研究了水平管束核沸腾传热的强化机理。对流传热和薄层导热传热是管束核沸腾传热的两重要机理。与单管管外池沸腾传热相比,管束沸腾传热系数的提高是对流传热系数和薄层导热传热系数共同增加的结果。The mechanism of enhaneed nucleate boiling in a tubs handle was investigated by electrodiffusion methed. The boiling heat transfer coefficient was suposed to he the sum of microlayer conductive heat tronsfer coefficient and convective heat transfer coefficient. The enhancement of heat transfer in the tube bundle was due to the efect ef beth microlayer conduction and bulk fluid envectien. The higher the heat flux of lower tubes, the higher the rate of heat transfered to upper tubes by mierolayer conduction. Microlayer conductive heat transfer cenfficient increased with the increase of pressure, but convective transfer coefficient appeared to be independent te the pressure.

关 键 词：电化学 水平管束核 强化 沸腾传热 

分 类 号：TQ022.125[化学工程]