High vapor quality two phase heat transfer in staggered and inline micro pin fin arrays

Abstract

We investigated two phase heat transfer in staggered and inline micro pin fin arrays, using deionized water and HFE-7200 as working fluids with exit qualities up to 90%,. The inline and staggered arrays have equivalent pin fin width of 153μm and height of 305μm on a heated base area of 0.96cm width by 2.88cm length. Mass fluxes ranged from 200 kg/m²s to 600 kg/m²s for HFE-7200 and 400 kg/m²s to 1300 kg/m²s for water. Base heat fluxes ranged from 27 W/cm² to 118 W/cm² for water, and 1 W/cm² to 36 W/cm² for HFE-7200. Average heat transfer coefficient data were obtained and successfully correlated to 3% MAE for water and 10-13% MAE for HFE-7200 in these pin fin arrays.