基于火花放电的抛物面槽式太阳能集热管环形空间气体压强与成分实验研究  

Experimental Study on Relationship among Gas Pressure and Composition of Spark Discharge in Annulus of Parabolic Trough Receivers

作　　者：张博 雷东强[2,3,4] 李晓 张馨 王志峰 ZHANG Bo;LEI Dongqiang;LI Xiao;ZHANG Xin;WANG Zhifeng(Department of Electrical and Control Engineering,North University of China,Taiyuan 030051,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100049,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Solar Thermal Energy and Photovoltaic System,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中北大学电气与控制工程学院,太原030051 [2]中国科学院电工研究所,北京100190 [3]中国科学院大学,北京100049 [4]中国科学院太阳能热利用及光伏系统重点实验室,北京100190

出　　处：《真空科学与技术学报》2022年第3期209-216,共8页Chinese Journal of Vacuum Science and Technology

基　　金：国家重点研发项目(2019YFE0102000)。

摘　　要：集热管的真空失效一直是抛物面槽式太阳能电站中存在的主要问题,其真空性能的优劣直接影响了整个系统的效率和经济性。本文提出一种新型基于火花放电和发射光谱法的便携式无损检测方法去评估集热管真空性能。针对集热管环形空间中最常出现的四种高纯气体(氢气、氦气、氮气、氩气)以及其混合气体,检测其放电特性与光谱特性,得出各气体特征峰光谱强度与气压的拟合规律并进行验证。结果表明:利用此方法可以准确获得气体种类和压力并将气压测量范围延伸至0.5 Pa。整套检测装置轻便易携带,适合在槽式太阳能集热系统或发电系统中在线应用。通过该装置对集热管进行无损真空性能测试,将为提高系统效率和降低运行维护成本起着重要指导意义。The vacuum failure of receivers has always been the main problem in parabolic trough solar power stations.Its vacuum performance directly affects the efficiency and economy of the whole system.In this paper,a new portable non-destructive testing method based on spark discharge and emission spectroscopy is proposed to evaluate the vacuum performance of receivers.Aiming at the four most common high-purity gases(hydrogen,helium,nitrogen,and argon)and their mixtures in the annulus of receivers,the discharge characteristics and spectral characteristics are detected.The fitting law between the spectral intensity of each gas characteristic peak and the air pressure is obtained and verified.The results show that this method can accurately obtain the gas type and pressure,and the pressure measurement range can be extended to 0.5 Pa.The whole detection device is portable and suitable for online application in a trough solar heat collection system or power generation system.The device's non-destructive vacuum performance test of the receivers will play an important guiding significance for improving the system efficiency and reducing the operation and maintenance cost.

关 键 词：真空性能 火花放电 发射光谱 无损检测 

分 类 号：TK513.1[动力工程及工程热物理—热能工程]