摘要
建立槽式太阳能聚光器跟踪太阳角度的数学模型,利用该跟踪太阳的数学模型对槽式聚光器不同布置方式太阳跟踪角度以及太阳光线入射角进行分析研究。计算槽式太阳能跟踪系统的角度的运行数据,分析其变化特性和跟踪规律。为了验证本文的计算方法,进行实验研究。计算和实验结果表明:入射角余弦夏至日的平均值是0.98,冬至日的平均值是0.71;对于聚光器采用东西水平布置南北轴跟踪方式,在冬至日正午时刻聚光器运行速率最快,峰值达到0.398°/min;采用南北水平布置东西轴跟踪方式,在夏至日出时刻聚光器运行速率最快,峰值达到0.45°/min;通过实验比较了跟踪角的实际测量值与计算角度最大偏差约为0.56°,平均偏差为0.334°。
The mathematical model of sun tracking angle for The characteristics of tracking angle of North-South axis parabolic trough solar concentrator （PTCs） was established. tracking mode, East-West axis tracking mode and the cosine of incidence angle were studied by using the mathematical model. The calculation results for tracking angle of parabolic trough solar collectors were obtained, and the characteristics and law of parabolic trough solar collectors were analyzed. The experimental study was carried out to verify the calculation method. The theoretical and experimental results show that the average value of the cosine of incidence angle is 0.98 at the summer solstice and 0.71 at the winter solstice, the sun tracking rate of North-South axis tracking for PTCs reaches the maximum value of 0.398 °/min at midday on the winter solstice, the sun tracking rate of East-West axis tracking for PTCs reached the maximum value of 0.45 °/min at sunrise of the summer solstice. Comparison and analysis of measured angle data and computed tracking angle show that the biggest difference between the two values is 0.56°, mean difference is 0.334°.
作者
王金平
王军
张耀明
刘晓晖
毕小龙
Wang Jinping Wang Jun Zhang Yaoming Liu Xiaohui Bi Xiaolong(College of Energy ＆ Environment Engineering, Southeast University, Nanjing 210096, China College of Energy and Power Engineering, Nanfing Institute of Technology, Nanjing 211000, China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2016年第12期3125-3131,共7页
Acta Energiae Solaris Sinica
基金
江苏省科技支撑计划(BE2012015
BE2013121)
江苏省高校自然科学研究项目(14KJD470003)
科技部中欧国际合作项目(SQ2013Z0C100023)
关键词
槽式太阳能
太阳跟踪
入射角余弦
南北轴跟踪
东西轴跟踪
parabolic trough solar collector
sun tracking
cosine of incidence
north-south axis tracking
east-west axis tracking
