%0 Journal Article %A Wei, Jin-Jia %A Kong, Xin %A Ding, Jie %A Zhang, Yonghai %D 2018 %I Begell House %K micropin fin, oscillation, boiling heat transfer %N 11 %P 991-1001 %R 10.1615/HeatTransRes.2017016873 %T POOL BOILING EXPERIMENT ON A MODIFIED MICROPIN-FINNED SURFACE WITH MECHANICAL OSCILLATION %U https://www.dl.begellhouse.com/journals/46784ef93dddff27,7ff6027401e57c45,6ae8406f478901ef.html %V 49 %X To further enhance pool boiling heat transfer, a new oscillation device was proposed. An oscillating plate was located over the heater surface with a vertical oscillation amplitude of 20 mm and frequency of 6 Hz. Three N-type phosphorus-doped silicon chips were used as heater surfaces. One was a smooth surface, and the other two were micropin-finned chips with a fin side length of 30 μm and fin height of 60 μm (chip PF30-60), and the pin fins were arrayed with aligned and staggered arrangements, respectively. Absolute ethyl alcohol was used as a working fluid. The results showed that mechanical oscillation can enhance boiling heat transfer in both convective region and high heat flux region. The wall superheat showed a considerable decrease of 20-30°C in the convective region by thinning the thermal boundary layer on the heater surface, and the critical heat flux could also be increased by 20%. In addition, the micropin-finned chips showed better performance due to much more fresh liquid supply from the interconnected tunnels formed by micropin fins, which is driven by capillary force. %8 2018-06-07