摘要
摘要针对5kw碟式斯特林发电装置的圆柱形腔式吸热／储热腔结构，采用数值模拟的方法研究了当吸热腔内以高密度聚焦太阳辐射为热源时吸热腔内壁辐射热流密度和温度分布规律；对比了开口型、风裙型和孔板型3种入光孔形式的吸热／储热腔的辐射场、温度场和周围高温空气自然对流流场分布特征。结果表明，孔板型吸热腔内壁温度不仅比开口型和风裙型的高400～700K，而且沿高度方向温差仅为另两种结构的1／4，温度分布更均匀，结构较好。
For the cylindrical high temperature thermal receiver/storage cavity of the 5 kW dish-Stirling solar power device, radiation heat flux and temperature distribution regularity on the inside surface of the cavity were stu- died with numerical simulation technique when the heat source of thermal receiver/storage cavity is high density focal solar radiation. The characteristics of the radiation field, temperature field and air natural convection field around open cavity, wind skirt cavity and aperture shield cavity were contrasted. Results show that the temperature of the aperture shield cavity endothermic inside surface is 400~700 K higher than that o{ the open cavity and wind skirt cavity, more- over, the temperature difference in the height direction is only one quarter of the others, and possesses more uniform temperature distribution, better structure.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2013年第24期129-135,共7页
Materials Reports
基金
甘肃省科技重大专项计划(01ZSB117)
关键词
碟式斯特林热发电腔式吸热器聚焦辐射集热
自然对流
dish-Stirling solar power, cavity receiver, focal flux, heat-collecting, natural convection
