A Study of Linear Fresnel Solar Collector Reflector …
365
Table 4 Optimal configuration for uniformly spaced identical reflectors
Distance between centers of consecutive reflectors Semi-width of each reflector Focal length
1.21 m
0.5 m
16.85 m
are under consideration and yet to be constructed. Paola Boito et al. [42] have done
the optimization for location, width, and focal length of reflectors.
Four different levels of optimization are considered in their work: uniformly
spaced similar reflectors; non-uniformly spaced similar reflectors; reflectors of the
same width, uniformly spaced, and variable focal lengths, and finally a full optimization. The researcher considered a model in which the receiver is taken as flat,
horizontal, and located at a fixed height of 10 m from the ground. The width of the
receiver is also kept fixed as 0.4 m, and a total of 25 numbers of reflectors are taken
into consideration. The results of their research for different cases are tabulated in
Tables 4, 5, 6, and 7.
Total 13 reflectors are listed numbered from 13 to 25. The properties of other
reflectors could be found by symmetry. The full optimization of a Fresnel plant is
Table 5 Optimal configuration for non-uniformly spaced identical reflectors (optimization for
reflector position)
Reflector
index
13 14
15
16
17
18
19
20
21
22
23
24
25
Optimum
position
0 1.14 2.29 3.43 4.57 5.74 6.87 8.03 9.27 10.51 11.73 13.07 14.46
Table 6 Optimal configuration for reflectors of the same width with uniform spacing and variable
focal lengths (optimization for focal length)
Reflector
index
13
14
15
16
17
18
19
20
21
22
23
24
25
Optimum
focal
length
13.1 12.9 13.0 13.3 13.7 14.0 15.0 16.3 17.5 18.6 11.7 13.0 14.4
Table 7 Optimal configuration for full optimization (optimization for position, width, and focal
length)
Reflector
index
13
14
15
16
17
18
19
20
21
22
23
24
25
Position 0
1.5
3.9
6.3
8.0
9.4 10.6 11.6 12.6 13.5 14.3 15.1 16.1
Width
0.37 0.88 1.24 0.82 0.62 0.51 0.44 0.37 0.35 0.3 0.2 0.2 0.4
Focal
length
15.9 10.5 12.0 13.8 15.4 16.7 18.0 19.0 20.0 21.0 21.9 22.4 22.7
365
Table 4 Optimal configuration for uniformly spaced identical reflectors
Distance between centers of consecutive reflectors Semi-width of each reflector Focal length
1.21 m
0.5 m
16.85 m
are under consideration and yet to be constructed. Paola Boito et al. [42] have done
the optimization for location, width, and focal length of reflectors.
Four different levels of optimization are considered in their work: uniformly
spaced similar reflectors; non-uniformly spaced similar reflectors; reflectors of the
same width, uniformly spaced, and variable focal lengths, and finally a full optimization. The researcher considered a model in which the receiver is taken as flat,
horizontal, and located at a fixed height of 10 m from the ground. The width of the
receiver is also kept fixed as 0.4 m, and a total of 25 numbers of reflectors are taken
into consideration. The results of their research for different cases are tabulated in
Tables 4, 5, 6, and 7.
Total 13 reflectors are listed numbered from 13 to 25. The properties of other
reflectors could be found by symmetry. The full optimization of a Fresnel plant is
Table 5 Optimal configuration for non-uniformly spaced identical reflectors (optimization for
reflector position)
Reflector
index
13 14
15
16
17
18
19
20
21
22
23
24
25
Optimum
position
0 1.14 2.29 3.43 4.57 5.74 6.87 8.03 9.27 10.51 11.73 13.07 14.46
Table 6 Optimal configuration for reflectors of the same width with uniform spacing and variable
focal lengths (optimization for focal length)
Reflector
index
13
14
15
16
17
18
19
20
21
22
23
24
25
Optimum
focal
length
13.1 12.9 13.0 13.3 13.7 14.0 15.0 16.3 17.5 18.6 11.7 13.0 14.4
Table 7 Optimal configuration for full optimization (optimization for position, width, and focal
length)
Reflector
index
13
14
15
16
17
18
19
20
21
22
23
24
25
Position 0
1.5
3.9
6.3
8.0
9.4 10.6 11.6 12.6 13.5 14.3 15.1 16.1
Width
0.37 0.88 1.24 0.82 0.62 0.51 0.44 0.37 0.35 0.3 0.2 0.2 0.4
Focal
length
15.9 10.5 12.0 13.8 15.4 16.7 18.0 19.0 20.0 21.0 21.9 22.4 22.7