CO2 Sequestration through Deep Saline Injection and ...

Figure 30
The length d relative to the width b of hexagonal heliostats [52]
3.8. LAND REQUIREMENTS
The land area required for a solar collector is dependent on location and the type of
supplementary electrical generation. The size of the collector field is inversely proportional to
the light intensity and the efficiency of the solar-electric generation equipment. This can be seen
in Table 1 where the land requirement is the highest for the lowest solar intensity (Alberta) and
the less efficient electrical generation system (PV) and vice versa. Table 1 summarizes the
design requirements for four cases for the PBR system. The table summarizes the total heliostat
area, number of heliostats and costs given the upper and lower bound projected costs.
Table 1
Area requirement for heliostats field and cost estimate for different region
Location Alberta South West
Electric Generation PV CCLC PV CCLC
Heliostat Area 164 km 2
90 km 2
68 km 2
37 km 2
# of Heliostats 1.1 x 10 6
@ $70/m 2
@ $106/m 2
6.1 x 10 5
4.6 x 10 5
2.5 x 10 5
$11.5 billion $6.30 $4.76 $2.59
billion billion billion
$17.4 billion $9.54 billion $7.21 billion $3.92 billion
3.8.1. Design Summary
The design is a collector field of a MTSA of extremely closely spaced heliostats with mirror,
made of ultra thin glass of about 3-4mm thickness. The glass is a di-electric silver coated mirror.
It has a drive-azimuth, drive elevation, structural steel pedestal, and a digital computer control to
rotate the reflectors so that the sun reflects to the tower. Also, the field is designed with multi
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