太阳时角对槽式聚光器焦线位置的影响  

Influence of solar hour angle in the position of focusing line on trough solar concentrator

作　　者：李承晴[1] 李明[1] 项明[1] 

机构地区：[1]云南师范大学物理与电子信息学院

出　　处：《能源工程》2008年第1期31-35,共5页Energy Engineering

摘　　要：在讨论太阳时角对槽式聚光器焦线位置影响的基础上,建立了因焦线运动导致太阳辐射损失的理论模型。通过对昆明晴天不同节气下的焦线运动和太阳辐射损失的分析和计算,得到了焦线随时角变化的一般规律以及瞬时太阳辐射强度损失和不同时段的太阳辐射相对损失率,并与实验进行了对比。针对焦线运动的特点,提出了对槽式集热系统接收器的改进措施和建议,认为对于大规模的槽式聚光集热器利用,因焦线运动造成的太阳辐射损失可不必考虑。Based on the influence of solar hour angle in the position of focusing line on trough solar concentrator, theoretical model for the loss of solar irradiance caused by moving of focusing line was established. With analysis on the moving of focusing line and calculation for the loss of solar irradiance at different solar terms in Kunming under clear days, an universal law of the position of focusing line variation with solar hour angle, the loss of instantaneous solar irradiance and the relative loss rate of solar irradiance in different period of time were obtained. A comparison between the experimental results and theoretical arithmetic was made, too. Some measures and suggestions for improvement of trough concentration system were given, which were founded on the characteristic of the moving of focusing line. It was shown that there was completely no need to take the loss of solar irradiance caused by moving of focusing line into account for large-scale application of the trough solar collector.

关 键 词：太阳时角 槽式聚光器 焦线 太阳辐射损失 

分 类 号：TK513.4[动力工程及工程热物理—热能工程]