槽式太阳集热器聚光特性的模拟研究  

SIMULATION STUDY OF CONCENTRATING CHARACTERISTICS OF TROUGH SOLAR COLLECTOR

作　　者：刘婷婷[1] 王军[1] 邴旖旎 杨帆[1] 冯炜 王登文 

机构地区：[1]东南大学江苏省太阳能技术重点实验室,南京210096 [2]南瑞太阳能科技有限公司,南京210096 [3]南京帕偌特太阳能有限公司,南京210096

出　　处：《太阳能学报》2017年第12期3202-3209,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51476099);中芬国际合作光伏光热一体化项目;江苏省科技计划(BE2013121)

摘　　要：为得到吸收管表面的热流分布,基于光线追踪法原理,采用微元分析的方法建立吸收器在理想太阳光线和不同入射角下的聚光特性基础模型,模拟并分析得出入射角对吸收管的聚光效率和周向热流分布均匀度影响较大。进一步基于锥体光学法的原理,建立考虑太阳形状的吸收管周向热流分布的数学模型,利用VB编程求解2种情况下的热流分布,与Sol Trace软件的模拟结果对比,偏差较小,证明模型的可靠性。模拟结果发现太阳形状的存在对吸收管的热力分布均匀度是有利的。之后在该模型基础上,进一步分析集热管定位误差对吸收管表面热流分布的影响。In order to obtain the heat flux distribution around the absorption tube surface, based on the principle of ray tracing method, the basic model of concentrated characteristics of absorber under ideal solar rays and different incident angles was established by using the method of micro element analysis. The simulation and analysis results show that incident angle has a great influence on concentration efficiency and uniformity of heat flux distribution around absorption tube surface. Based on the principle of pyramidal optics, the mathematical model of the circumferential heat flux distribution in the absorber tube considering the shape of the sun was established, and the heat flow distribution in both cases was solved by VB programming. Compared with the simulation results of SolTrace software, the deviation was small, proving the model＇ s reliability. The simulation results show that the presence of the sun shape is benefical to the thermal uniformity of the absorber tube. Based on the model, the effect of the positioning error of heat pipe on the heat flux distribution on the surface of absorber tube is further analyzed.

关 键 词：槽式集热器 聚光特性 热流分布 定位误差 

分 类 号：TK513[动力工程及工程热物理—热能工程]