摘要
建立了描述半周加热、半周绝热的不均匀热流边界条件下熔盐吸热管内热传导与热对流换热的数值模型,模型考虑了管壁导热和熔盐的变物性。采用Fluent软件,通过求解三维N-S方程和能量方程,对熔盐吸热管的传热过程进行了模拟,并在熔盐吸热传热实验平台上进行了试验研究。模拟计算与实验结果基本一致。揭示了熔盐吸热管在高温、高热流密度条件下的管内流速和温度分布规律及其换热特性,为塔式太阳能热发电熔盐吸热器的设计和运行控制提供了重要依据。
The numerical model for heat conduction and convection of a molten salt receiver tube with constant heat flux on one half was set up, the heat conduction in the tube wall and the property variations of molten salt were considered in the numerical model. Using the Fluent software, through solving the three dimension N-S equation and energy equation, the heat transfer process of molten salt receiver was simulated, while experiments research were done on the molten salt heat transfer experimental platform.The results of simulation and experiments were agreed on the whole. The velocity and temperature field in the tube, and the heat transfer characteristic for molten salt receiver tube under high heat flux condi- tion were revealed.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2009年第8期1007-1012,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50776020)
国家高技术研究发展计划(863)项目(2006AA05010503)
关键词
熔盐吸热器
半周加热
数值模拟
传热实验
molten salt receiver
semi circumference heat
numerical simulation
heat transfer experiment
