Study on flow and heat transfer mechanism of supercritical CO2 in inclined upward tube under cooling conditions
Supercriticl CO2 has shown great potential in the fields of tower solar thermal power generation and nuclear energy industry.In order to study the heat transfer characteristics of supercritical CO2 in an inclined upward tube under cooling conditions,numerical simulation methods were used to simulate it by dividing it into liquid like zone,quasi critical zone,and gas like zone according to temperature,analyze the density and temperature field distribution of supercritical CO2 in an inclined upward tube,as well as the variation of its convective heat transfer coefficient and average resistance coefficient along the tube length,and study the effects of different tilt angles,mass fluxes,and pressures on the heat transfer performance of supercritical CO2.The research results indicate that the change in tilt angle has an impact on the convective heat transfer coefficient and average resistance coefficient of supercritical CO2 in the liquid like region,but has no effect on the gas like region.An increase in mass flux can increase the convective heat transfer coefficient and reduce the average drag coefficient.The change in pressure has a significant impact on the convective heat transfer characteristics in the quasi critical and gas like zone.
国家科技期刊平台
NSTL
万方数据
