Experimental Investigations of Two-Phase Cooling in Microgap Channel
Final rept. 1 Apr 2010-31 Mar 2011
NATIONAL UNIV OF SINGAPORE
Pagination or Media Count:
In this study, experiments have been performed in order to examine two-phase flow boiling in a silicon microgap based heat sink having gap height of 190 microns, 285 microns and 380 microns, using water with inlet temperature of 86 degrees C. The effects of mass flux and heat flux on heat transfer coefficient and pressure drop characteristics were examined by varying mass flux ranging from 420 Kgsquare m s to 970 Kgsquare m s and effective heat flux up to 100 Wsquare cm. An array of integrated micro-temperature sensors allows local heat transfer coefficients to be determined. The fluid temperatures and pressure drop across the microgap array were also measured. The size effects on different parameters have been investigated. The extensive microgap boiling experiments and analysis has led to some important findings listed in this final report.
- Electrical and Electronic Equipment
- Air Conditioning, Heating, Lighting and Ventilating