Experiment of Heat transfer to supercritical water flowing in vertical annular channels

摘要：

An experimental study of heat transfer to supercritical water was performed at XianJiaotong University (XJTU) with a vertical annular tube. The annular test sections wereconstructed with annular gaps of 2mm, and an internal heater of 8-mm outer diameter.Depending on the flow conditions and heat fluxes, two distinctive heat-transfer regimes,referring to as the normal heat transfer and deteriorated heat transfer, have been observed.Comparing to upward flow, the heat transfer coefficient has been increased obviously in thedownward flow at high heat flux. A strong effect of spacer on heat transfer has beenobserved at locations downstream of the device in the annuli whether downward or upwardcondition. The spacer effect impairs the buoyancy effect in low heat flux, but not for highheat flux.

作者: Zhendong Yang Qincheng Bi Han Wang Gang Wu

作者单位: State Key Laboratory of Multiphase Flow in Power Engineering,Xian Jiaotong University,Xian 710049,China

会议类型: 国际会议

会议名称: 3rd China-Canada Joint Workshop on Supercritical Water-Cooled Reactors(第三届中国-加拿大超临界水堆研讨会 (CCSC-2012)

会议地点: 西安

会议语种:英文

页码: 1-13

在线出版日期: 2012-04-18（万方平台首次上网日期，不代表论文的发表时间）