轴向非均匀热流下熔盐吸热管的传热特性  

Heat Transfer Performance of Molten Salts in Receiver Tube With Axial Nonuniform Heat Flux

作　　者：沈向阳[1] 丁静[2] 陆建峰[2] 

机构地区：[1]仲恺农业工程学院机电工程学院,广东广州510225 [2]中山大学工学院,广东广州510006

出　　处：《当代化工》2015年第8期1965-1968,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金重点项目;项目号:51436009;广东普通高校青年创新人才项目;项目号:2014KQNCX168

摘　　要：以熔盐为传热工质,对轴向非均匀热流下吸热管内传热进行了数值模拟。结果表明:吸热管顺流和逆流加热时,吸热管内高热流侧流速均大于对应位置的低热流侧流速,轴向热流突变处的管内流速变化率较大。吸热管逆流加热的管外壁最高温度及高温区平均温度明显低于顺流加热,逆流加热的管壁的热应力大大减小,高温区的辐射热损失也减小。The heat transfer performance of molten salts in receiver tube with axial nonuniform heat flux was simulated The simulated results show that the flow velocity of high heat flux side is higher than that of low heat flux side, and the velocity changing rate is large at the axial heat flux variation. The maximum wall temperature of receiver tube with counterflow heating is obviously lower than that with parallel-flow heating, which can cause the receiver tube thermal stress and heat loss of radiation reduce remarkably.

关 键 词：吸热管 非均匀热流 熔盐 传热 

分 类 号：TQ021.3[化学工程]