Boiling of HFE-7100 on straight pin fin

This paper, for the first time, experimentally elucidated pin fin boiling c haracteristics 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 liqui d/fin combination there exist upper steady-state (USS) branch, lower steady -state (LSS) branch, and a large, unstable regime located in between the tw o branches. Zones with different stability characteristics are mapped accor ding to boiling on fins with different aspect ratios. Liquid subcooling enh ances heat transfer performance and boiling stability. Calculation of boili ng curve qualitatively describes the experimental results. (C) 2000 Elsevie r Science Inc. All rights reserved.