Influence of pressure parameters on heat transfer performance of spray cooling
LIU Ni;ZHAN Taijie;HONG Chunfang;School of Energy and Power Engineering, University of Shanghai for Science and Technology;
The effects of spray pressure and system pressure on spray cooling heat transfer characteristics of smooth surfaces were studied in a closed experimental apparatus with distilled water. The results show that with the increase of the inlet pressure, the velocity and the density of droplet outlet increase, the heat transfer performance of spray cooling is enhanced and the average surface temperature is reduced. In addition, reducing the system pressure at a constant heating power, the heat flux and the heat transfer coefficient show a significant improvement and the mean surface temperature decreases obviously. The non-uniformity of surface temperature is improved compared with atmospheric spray cooling system. When the system pressure drops from 101 k Pa to 10 k Pa, the maximum temperature difference of the surface decreases from 12.8 ℃ to 5.7 ℃.
【CateGory Index】： TK124