V型腔式太阳能接收管传热性能模拟与实验研究  

SIMULATION AND STUDY OF HEAT TRANSFER CHARACTERISTICS IN V-CAVITY SOLAR RECEIVER

作　　者：邵丹丹[1] 肖鑫[1] 张鹏[1] 李明[2] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240 [2]云南师范大学太阳能研究所,昆明650092

出　　处：《太阳能学报》2014年第10期2043-2048,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(U1137605)

摘　　要：提出一种应用于槽式太阳能集热系统的V型腔体式接收管,建立接收管内部工质流动与传热过程的物理和数学模型,并运用蒙特卡洛光线追迹法对接收管腔体壁面进行辐射计算,得到腔体壁面辐射强度分布曲线,以此为热边界条件模拟研究接收管内部工质流动传热特性。搭建实验测试平台开展热性能实验测试,并与模拟结果进行比较,验证模型的准确性。研究表明,管内矩形翅片可强化腔体壁面与管内流体的换热,有效降低壁面温度,减小热损失;在一定范围内,流量和辐射加热量的增大都能减小该V型腔体式接收管的热损失,提高热利用率。A V-cavity solar receiver used in parabolic trough solar collector system was designed. The corresponding physical and mathematical models were proposed for flow and heat transfer process of internal working fluid in the receiver. The heat flux distribution on the wall of the cavity of the receiver was calculated successfully by Monte Carlo ray-trace method. And the distribution was considered as the boundary condition to numerically calculate the heat transfer performance of the receiver. An experiment platform was set up to validate the models. The results show that the rectangular fins in the receiver can enhance heat exchange between cavity wall and working fluid and at the meantime reduce heat loss by lowering the temperature of cavity wall. The heat loss of the receiver can be reduced and thermal utilization rate can be improved by increasing either flow rate and heat flux.

关 键 词：V型腔体 矩形翅片 数值模拟 换热性能 

分 类 号：TK513.3[动力工程及工程热物理—热能工程]