应用于设施农业土壤供热系统的复合多曲面聚光器的聚光集热性能研究  

Study on the concentrated heating performance of compound multi-surface concentrator applied in facility agricultural soil heating system

作　　者：刘雪东 彭娅楠 邵正日 马兴龙[4] 侯静[5] 常泽辉[1,2] Liu Xuedong;Peng Yanan;Shao Zhengri;Ma Xinglong;Hou Jing;Chang Zehui(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Engineering Center of Solar Energy Utilization Technology,Inner Mongolia University of Technology,Hohhot 010051,China;School of Mechanical and Power Engineering,Yingkou Institute of Technology,Yingkou 115000,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;College of Building Equipment and Automation,Inner Mongolia Technical College of Construction,Hohhot 010070,China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051 [2]内蒙古工业大学太阳能应用技术工程中心,内蒙古呼和浩特010051 [3]营口理工学院机械与动力工程学院,辽宁营口115000 [4]北京理工大学机械与车辆学院,北京100081 [5]内蒙古建筑职业技术学院建筑设备与自动化工程学院,内蒙古呼和浩特010070

出　　处：《可再生能源》2021年第8期1038-1044,共7页Renewable Energy Resources

基　　金：国家自然科学基金项目(51966012);内蒙古自治区高校青年科技英才支持计划(NJYT-18-A12);内蒙古自治区高等学校科学研究项目(NJZY17491);内蒙古科技重大专项(2018);内蒙古自治区研究生科研创新项目(SZ2020071)。

摘　　要：文章通过仿真模拟和试验测试,分析了光线入射偏角对复合多曲面聚光器聚光集热性能的影响。首先,建立了聚光器三维模型;然后,利用光学仿真软件对该聚光器进行光线追迹和光学性能计算,并根据计算结果分析了径向、轴向入射偏角对该聚光器光线接收率、聚光效率等的影响;最后,基于光学计算结果,搭建复合多曲面聚光器光热性能试验台,并根据测试结果研究了该聚光器在实际天气条件下运行时的聚光集热性能。分析结果表明:当径向入射偏角小于14°时,该参数对复合多曲面聚光器的光线接收率和聚光效率影响较小;当径向入射偏角为20°时,该聚光器的光线接收率和聚光效率分别为46.50%,39.49%;此外,该聚光器的光线接收率和聚光效率均随着轴向入射偏角的变化呈现出对称的变化趋势,当轴向入射偏角为20°时,该聚光器的光线接收率和聚光效率分别为87.94%,74.50%;在晴天条件下时,该聚光器出口处空气温度的变化趋势与太阳辐照度一致,正午时,该聚光器出口处空气温度最高,可达到46.9℃;测试期间,该聚光器的最大瞬时集热量和光热转化效率分别为411.54 W,42.38%。In this paper,the influence of deflective incidence angle on the concentrated heating performance of compound multi-surface concentrator is explored by simulation and experimental testing.Firstly,the three-dimensional model of compound multi-surface concentrator is established and imported into the optical simulation software for ray tracing and optical performance calculation,then,the influence of radial and axial deflective incidence angle on the overall ray's receiving rate and concentrating efficiency of the concentrator is analyzed.Finally,based on the optical calculation results,a photothermal performance testing platform of compound multi-surface concentrator is set up,and the concentrated heating performance of the concentrator beneath the conditions of sunny weather is analyzed.The outcomes manifested that the radial deflective incidence angle has little effect on the optical performance of the concentrator when it's less than 14°,and when the radial incidence angle is 20°,the overall ray's receiving rate and concentrating efficiency are 46.50%and 39.49%,respectively.In addition,the overall ray's receiving rate and concentrating efficiency of the concentrator decrease synchronously and symmetrically with the increase of the axial deflective incidence angle,when the axial deflective incidence angle is 20°,the overall ray's receiving rate and concentrating efficiency are 87.94%and 74.50%,respectively.When the compound multi-surface concentrator operates in sunny weather,it's outlet temperature change trend with operation time is consistent with the trend of solar radiation,and it's maximum value at noon is 46.9℃,what's more,the maximum instantaneous heating collection and light-thermal conversion efficiency of the concentrator during the testing period are 411.54 W and 42.38%,respectively.

关 键 词：入射偏角 复合多曲面 聚光 性能 效率 

分 类 号：TK519[动力工程及工程热物理—热能工程]