Comparison Study of Two Different Sun-Tracking Methods in Optical Efficiency of Heliostat Field

Table 1

Specification of central power tower and heliostat field layout.

Total number of heliostats	317
Reflective area of heliostat	11 m × 11 m
Target (or tower) height, H	95 m
Height of heliostat, h	7 m
Total reflective area of heliostat field	38,357 m^2
Total land area	90,792.03 m^2 (9.0792 hectare)
Packing factor	42.247%
Ring number	1	2	3	4	5	6	7	8	9
Radial distances of heliostats from the central tower in meter, r	61.3	74.6	86.6	97.2	114	127.6	140.5	152.8	164.3
Target angle, λ	55.16°	49.72°	45.45°	42.15°	37.67°	34.60°	32.06°	29.94°	28.18°
Field layout (number of heliostats per ring)	24	24	24	24	44	44	44	44	45