Boiling of HFE-7100 on straight pin fin

This paper, for the first time, experimentally elucidated pin fin boiling characteristics of saturated and subcooled HFE-7100, a CFC-substitute, under atmospheric pressure. Fin base temperature and heat flux data are, for the first time, measured along with the fin tip temperature. For a given liquid/fin combination there exist upper steady-state (USS) branch, lower steady-state (LSS) branch, and a large, unstable regime located in between the two branches. Zones with different stability characteristics are mapped according to boiling on fins with different aspect ratios. Liquid subcooling enhances heat transfer performance and boiling stability. Calculation of boiling curve qualitatively describes the experimental results.