Page 247 - Design of Solar Thermal Power Plants
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230 4. DESIGN OF THE CONCENTRATION SYSTEM
FIGURE 4.3 Azimuth-elevation tracking heliostat [20].
FIGURE 4.4 Operational principle of the spinning-elevation tracking heliostat [33].
In polar two-axis tracking, the fixed axis is parallel to the Earth’s axis.
When regularly tracking the movement of the Sun, the tracker revolves
around the fixed axis clockwise at a constant speed.
In spinning-elevation two-axis tracking, the spinning axis serves as
the fixed axis pointing to the target location, with the elevation axis
