Subcooled flow boiling heat transfer for hybrid micro/nano-structured surface with high heat flux incidence
The subcooled flow boiling enhanced heat transfer technology of water on hybrid micro/nano-structured surfaces has great potential for applications in high heat flux cooling systems such as electronic devices and tokamak divertors.However,the process of subcooled flow boiling heat transfer on hybrid micro/nano-structured surfaces is complex,and the effects of heat transfer performance and the mechanism are not yet clear.This lack of clarity hinders application of micro/nano-structured surfaces.To address these issues,experimental studies on subcooled flow boiling were conducted on three different hybrid micro/nano-structured surfaces.A total of 530 experimental data points of subcooled flow boiling heat transfer of water on hybrid micro/nano-structured surfaces were obtained using vacuum brazing technique.The parameters considered in the experiments included heat flux(ranging from 3.4MW/m2 to 13.1MW/m2),pressures of 0.5MPa,IMPa and 1.5MPa,liquid velocities of 1m/s,3m/s and 5m/s,inlet temperatures of 303K,313K and 323K.The measurements of the heat transfer coefficient with different micro/nano-structured surfaces were compared with 25 empirical correlations from various papers.The correlation of Kutateladz was found to have the best prediction accuracy,with a MAD of 22.2％.These evaluation results provide a useful reference for the application of hybrid micro/nano-structured surfaces.
hybrid micro/nano-structured surfacessubcooled flow boilingheat transfer coefficientempirical correlation
万方数据
维普
