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 chlorofluorocarbon (C FC)-substitute, under atmospheric pressure. Fin base temperature and heat f lux data are, for the first time, measured along with the fin tip temperatu re. For a given liquid/fin combination there exist upper steady-state (USS) branch, lower steady-state (LSS) branch, and a large, unstable regime loca ted in between the two branches. Zones with different stability characteris tics are mapped according to boiling on fins with different aspect ratios. Liquid subcooling enhances heat transfer performance and boiling stability. Calculation of the boiling curve qualitatively describes the experimental results. (C) 2000 Elsevier Science Inc. All rights reserved.