关键词: 太阳能热发电, 线性菲涅尔聚光装置, 矢量法, 辐照度

Abstract:

It is necessary for calculating the solar beam radiation on the tilted mirror or aperture for designing of solar thermal utilization.Linear Fresnel reflector (LFR) can be thought that smooth linear optical reflector is broken into segments.Every mirror segment or row of this kind concentrator needs to track the sun real time and reflects the sunlight to fixed linear receiver.Therefore, the incidence angle and the direction of reflected sunlight and tracking tilt-angle of every mirror row consequentially vary throughout the year, which makes the optical analysis, especially the calculation of the solar beam radiation received by full mirror field ,very complexity.This paper firstly derived the equations of incidence angle and tracking inclination angle by vector analysis, and then computed the instantaneous solar beam radiation of all mirror elements.Finally, cumulated irradiation of whole mirror field during the available work was obtained.The algorithm of optimal tower highness of LFR mirror field was derived by analyzing excursion of reflecting sunlight.

Key words: 太阳能热发电, 线性菲涅尔聚光装置, 矢量法, 辐照度