碟式太阳能集热器结构对热辐射影响  

Effect of Dish Solar Collector Structure on Thermal Radiation

作　　者：李少华[1] 王丽伟[1] 廖明俊[1] LI Shaohua;WANG Liwei;LIAO Mingjun(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《华北电力大学学报（自然科学版）》2018年第5期85-89,共5页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51576062)

摘　　要：为了研究碟式太阳能系统中聚焦点发散情况下,集热器形状参数对系统光热转换效率的影响,采用蒙特卡罗射线跟踪方法对三种类型集热器进行数值模拟。研究结果表明:当聚焦面尺寸不变时,辐射通量聚光比基本一致;聚焦面上热量密度呈现圆环状温度分布;集热器结构对腔体壁面热量分布有影响。以上研究结果对碟式太阳能系统的理论设计和实际性能预测提供理论参考。In order to study the influence of the shape parameters of the collector on the photothermal conversion efficiency in the case of focusing point divergence in dish solar system,this paper adopts the Monte Carlo ray tracing method to simulate three types of collectors.Research indicates that when the size of focal plane is constant,the flux concentration ratios are basically the same;the heat flux on the focusing surface distributes in an annular shape;and the collector structure affects the heat distribution of the cavity wall.This paper provides a reference for the theoretical design and the actual performance prediction of dish solar system.

关 键 词：碟式太阳能 热发电 光线跟踪 聚光比 数值模拟 热量密度 

分 类 号：TK01[动力工程及工程热物理]