摘要
基于流量均匀性的要求,对一种太阳能高温吸热器进行结构优化设计。基于蒙特卡洛光线跟踪法及光线的镜面反射定律,数值模拟分析吸热管壁面热流分布。施加壁面热流边界,以氦气为工质数值计算该吸热器的流动换热性能。结果表明:吸热器优化结构能满足换热工质在吸热细管中流动的流量不均匀性小于5%的要求;吸热器壁面热流梯度较大,不宜采用等热流假设进行计算;氦气的出口温度分布均匀,整个出口氦气的平均温度约为1125K,最大温差为50K。
Structural optimization design of a solar energy receiver was carried out based on the discharge uniformity. Monte Carlo Ray Tracing method and mirror reflection law were employed to simulate heat flux distribution of the receiving walls. Then the thermal behavior performance between working fluid （helium） and receiving walls was simulated numerically based on this heat flux. The results show that discharge nonuniformity of helium in tubules is less than 5%. Heat flux gradient of the receiving walls is not so little enough to be ignored when simulating receiver＇s thermal performance. The average exit helium temperature is 1125K and largest difference in temperature is 50K, so that the temperature distribution of exit helium is uniformity.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2012年第12期2098-2104,共7页
Acta Energiae Solaris Sinica
关键词
太阳能吸热器
结构优化设计
蒙特卡罗光线跟踪法
数值模拟
温度
solar energy receiver
structural optimization
Monte Carlo Ray Tracing method
numerical sinmlation
temperature
