布置螺旋管的太阳能腔式吸热器光学性能模拟  

Simulation of Optical Performance for a Solar Cavity Receiver Arranged With Spiral Tubes

作　　者：王晓文 屠楠 方嘉宾 刘晓群 王驰宇 刘家琛 WANG Xiaowen;TU Nan;FANG Jiabin;LIU Xiaoqun;WANG Chiyu;LIU Jiachen(School of Mechanical and Electrical Engineering,Xi’an Polytechnic University,Xi’an 710600,Shaanxi Province,China;School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,Shaanxi Province,China)

机构地区：[1]西安工程大学机电工程学院,陕西省西安市710600 [2]西安交通大学化学工程与技术学院,陕西省西安市710049

出　　处：《发电技术》2023年第2期221-228,共8页Power Generation Technology

基　　金：陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-179);西安市现代智能纺织装备重点实验室建设项目(2019220614SYS021CG043)。

摘　　要：利用TracePro光学软件模拟了是否考虑布置螺旋管的太阳能腔式吸热器光学性能的差异,探讨了腔体内壁面的反射率及内置螺旋管的外径、螺距对吸热器光学性能的影响,并对比了4种不同形状吸热器的光学性能。结果表明:由于不能真实反映螺旋管所吸收光通量的大小,将吸热器内壁面近似为螺旋管外壁面的处理方法是不可取的;在螺距不变的情况下,腔体内壁面的反射率与内置螺旋管外表面吸收光通量的大小以及系统的光学效率成正比;当反射率小于0.8时,螺距的增加可以提高吸热器的光学性能,而当反射率超过0.8时情况则相反。对比4种不同形状的吸热器可以发现,圆台-圆柱形吸热器具有最好的光学性能,其光学效率可达85.42%。研究结果可为吸热器的设计和优化提供理论指导,并为吸热器传热性能的研究奠定基础。Using TracePro optical software,the differences in optical performance of solar cavity receivers with or without spiral tubes were simulated,and the effects of the reflectivity of inner wall of cavity and the outer diameter and pitch of the spiral tubes on the optical performance of receivers were investigated.Besides,the optical performance of four different receiver shapes were also compared.The results show that it is not proper to approximate the inner wall of the receivers as the outer surface of the spiral tubes,because this approximation cannot truly reflect the heat flux absorbed by the spiral tubes.When the pitch is constant,the reflectivity of the inner wall of the cavity is proportional to the amount of heat flux absorbed by the outer surface of the spiral tubes and the optical efficiency of the system.As the reflectivity is less than 0.8,the increase of the pitch can improve the optical performance of the receiver,while the opposite is true when the reflectivity exceeds 0.8.In addition,the truncated-cylindrical receiver has the best optical performance among the four different shapes of receivers,and its optical efficiency can reach as high as 85.42%.This research can provide theoretical guidance for the design and optimization of receivers,and lay a foundation for the analysis of heat transfer performance of receivers.

关 键 词：太阳能 腔式吸热器 螺旋管 反射率 光学性能 

分 类 号：TK513.3[动力工程及工程热物理—热能工程]