太阳聚光下单球体温度变化特性研究  

STUDY ON TEMPERATURE RESPONSE OF SINGLE SPHERE UNDER CONCENTRATED SUNLIGHT

作　　者：边晖 王志峰 李金平[1] 徐立[2,3,4] 张生春[2,3,4] 任羽聪[2,3,4] Bian Hui;Wang Zhifeng;Li Jinping;Xu Li;Zhang Shengchun;Ren Yucong(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Solar Thermal Energy and Photovoltaic System,Chinese Academy of Sciences,Beijing 100190,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;Guangdong Fivestar Solar Energy Co.,Ltd.,Institute of Electrical Engineering,Chinese Academy of Sciences Joint Technology Research Center of Solar Thermal Utilization,Beijing 100190,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]中国科学院太阳能热利用与光伏系统重点实验室,北京100190 [3]中国科学院电工研究所,北京100190 [4]中国科学院电工研究所与五星太阳能公司太阳能热利用技术联合研究中心,北京100190

出　　处：《太阳能学报》2021年第7期207-213,共7页Acta Energiae Solaris Sinica

基　　金：第四代光热发电高温固体颗粒吸热器研究(Z181100004718002)。

摘　　要：球流吸热器为使用球体作为吸热和传热工质的吸热器,为验证其在原理上的可行性并研究球体吸热过程的影响因素,该文在太阳模拟器上进行球体吸热实验,建立球体得热模型并对模型进行了实验验证。该文用模型研究了能流密度、空气流速和表面发射比对球体温度变化特性的影响,研究表明球体作为吸热工质时具有较高的热效率,因此球流吸热器在原理上可行。增加投入在球体表面的能流密度可显著提高球体在吸热过程中的热效率,降低空气流速和降低球面的发射比可有效提高球体在吸热过程中的热效率。这些结果对最终的球流吸热器设计和运行具有指导作用。Sphere flow receiver is a receiver which uses spheres as the heat absoption and transfer media.In order to verify the feasibility of the sphere flow receiver in principle,and to study the influencing factors of the heat absorption processes of the spheres,a sphere heating model was established and then verified by experiments carried out with the solar simulator.The effects of the radiation flux density,the air flow rate and the surface emissivity on the characteristics of the sphere temperature were investigated using this model.This study shows that spheres have the high thermal efficiency as the heat absorption media,so the sphere flow receiver is feasible in principle.Increasing the radiation flux density on the sphere surface can significantly improve the thermal efficiency of the sphere during the heat absorption process.Reducing the air flow rate or the surface emissivity can effectively improve the thermal efficiency.These results offered guidance for design and operation of the further sphere flow receiver.

关 键 词：太阳能发电站 辐射能流密度 热辐射 热力学性能 

分 类 号：TK51[动力工程及工程热物理—热能工程]