Читать книгу Energy Storage - Группа авторов - Страница 16

There are two ways by which the solar radiation is concentrated from the solar panel: line focusing and point focusing systems. In the line focusing system, solar collectors concentrate the radiation along a focal line. In the point focusing system, solar radiation is concentrated on a single focal point. A single axis tracking system is needed to follow the sun during the day for the line-focusing systems. On the other hand, two axis tracking systems are needed for the mirrors in point focusing systems. Based on the focusing concepts and receiver geometry, currently four design concepts are used, such as parabolic trough system, linear Fresnel system, power towers and parabolic dish systems. A summary of these receiver concepts is illustrated in Figure 1.3 and briefly explained below.