中文摘要：

研究并设计及实现了抛物槽式太阳能集热器（Parabolic Trough Concentrator,PTC）截断因子计算方法,建立集热器数学模型,分析太阳光线入射和反射路径,通过反射光线与吸热器中心线空间距离计算截断因子。分析支架太阳跟踪误差对截断因子的影响,当集热器在抛物线横截面的跟踪角度误差α小于0.975 3°时,截断因子均大于0.95;在纵向对称平面的跟踪误差β小于16°时,截断因子大于0.95。结果与Soltrace相比平均偏差小于0.007,证明算法正确性。分析聚光器、吸热器的支撑点装配误差对截断因子的影响,结果表明,当镜面支撑点误差标准差小于0.9 mm时,截断因子大于0.95;当吸热管直径为70 mm的吸热器支撑点误差标准差小于30mm时,截断因子大于0.95。即聚光器装配误差对截断因子的影响远大于吸热器装配误差的影响,聚光器装配误差的增加更易造成聚光效率的降低。

英文摘要：

Intercept factor calculating method of parabolic trough concentrator （PTC） is studied and designed, and is obtained by calculating the distance between the reflected light and the center line of receiver after the mathematical model of collector is established and the corresponding reflected light of a input ray is reduced. Based on this, the influence of solar tracking error on the intercept factor is analyzed, the result show that the intercept factor is greater than 0.95 once the tracking error a is less than 0.975 3 °, while the tracking errorβ must be less than 16 ° to reach the same value of intercept factor. These results are compared with software Sohrace, and the average deviation from it is less than 0.007, which proves the correctness of the calculating. Finally, the influence of assembly error of collector and receiver on the intercept factor are analyzed, and the results show that when the error＇s standard deviation of concentrator bracing points is less than 0.9 mm, intercept factor is greater than 0.95 ; whereas the error＇s standard deviation of the bracing points has to be less than 30 mm to get the same factor for a receiver which radius is 70 mm, that is to say that the influence of assembly error of concentrator on intercept factor has more significant impact than that of receiver.