407 Transient Boiling Critical Heat Flux on Horizontal Vertically-Oriented Ribbon with Treated Surface in Pool of Water

抄録

A steady and transient CHF due to exponentially increasing heat inputs to a horizontal vertically-oriented platinum ribbon with different surfaces in a pool of water at pressure and liquid subcooling were investigated. The period of exponentially increasing heat generation was varied from 10 ms to 20 s. The values of surface roughness and contact angles were measured prior to pool boiling experiment. The pool boiling experimental results such as transient CHF on ribbon heater were compared with previous correlation. It was occurred that the transient CHF on short period is higher than long period. In addition, the increasing rate of transient CHF in short period is higher than the prediction of existing equation.