Experimental investigation of heat transfer for supercritical pressure water flowing in vertical annular channels

An experiment has recently been completed at Xi’an Jiaotong University (XJTU) to obtain wall-temperature measurements at supercritical pressures with upward flow of water inside vertical annuli. Two annular test sections were constructed with annular gaps of 4 and 6mm, respectively, and an internal heater of 8mm outer diameter. Experimental-parameter ranges covered pressures of 23–28MPa, mass fluxes of 350–1000kg/m2/s, heat fluxes of …