Comparison Study of Two Different Sun-Tracking Methods in Optical Efficiency of Heliostat Field
Figure 1
Coordinate system attached to earth-surface reference frame in which the central tower and heliostat are located for two different sun-tracking methods. is the facing angle, and is the facing angle of the heliostat. , when the heliostat is due south of the target and it is positive value if the spinning axis is rotated from north to east direction; if the heliostat is of the same height as the target and it is positive value when the spinning axis is rotated in such a way that the target is located higher than the heliostat.
