Solar thermal power generation potential supply
¼
Potential of the electricity production
Total electricity consumption in 2017
 100%
ð9:11Þ
Coefficients of typical solar collectors are given in Table 9.3 (Matuska 2017;
Tripanagnostopoulos et al. 2000) for performance comparison, and their efficiencies
are shown in the following figures. These figures show the relationship between
solar irradiance and solar collector efficiency when t 0 ¼ 20
C and t sc ¼ 60
C
(Fig. 9.1), t sc ¼ 70
C (Fig. 9.2), t sc ¼ 80
C (Fig. 9.3), and t sc ¼ 90
C (Fig. 9.4). A
vacuum single tube with flat absorber shows the maximum efficiency during the
whole solar irradiance period under all temperature conditions and therefore is
chosen to harness solar thermal energy for the KCS-11 to generate electricity.
Table 9.3 The coefficients of typical solar collectors
Collector type
η 0
a 1
a 2
Unglazed
0.85
20
–
Glazed with nonselective absorber
0.75
6.5
0.030
Glazed with selective absorber
0.78
4.2
0.015
Vacuum single tube (flat absorber)
0.75
1.5
0.008
Vacuum tube Sydney
0.65
1.5
0.005
Flat plate
0.75
3.5
0.015
CPC solar collector (flat absorber)
0.70
2.6
7.5
Source: Matuska (2017), Tripanagnostopoulos et al. (2000)
Fig. 9.1 Relationship between solar irradiance and solar collector efficiency when t 0 ¼ 20
C and
t sc ¼ 60
C
9 Low-Carbon Technology Integration
175