Study on Convective Heat Transfer of Supercritical Nitrogen in a Vertical Tube for Liquid Air Energy Storage

The convective heat transfer behavior of supercritical nitrogen (S-N2) has played a significant role in optimizing the design recently emerging cryogenic cold storage and recovery systems. However, studies on S-N2 have been relatively scarce, not to mention that there is legitimate urge for robust numerical model accurately predict explain under various working conditions. In this paper, both experimental were conducted small vertical tube. results demonstrated standard k-ε performed better predicting key characteristics than SST k-ω model. effects flux inlet pressure large mass evaluated. variation mechanisms local performance revealed by illustrating radial profiles thermophysical properties turbulent parameters N2. It was found along flow direction mainly determined profile specific while best with ratio viscosity.