364
G. Kumar and H. Gupta
Table 3 Effect of location, configuration, and orientation on efficiency [33]
Orientation
North–South
East–West
Latitude(N)
37°
No. of reflectors
20
10
Tilt(°C)
0
0
Shift
Variable
Variable
Width
Constant
Constant
Minimum rad., I min (kW/m 2 )
25
25
Energy efficiency, ηen(%)
46.0
46.1
Latitude(N)
24°
No. of reflectors
20
10
Tilt(°C)
0
0
Shift
Variable
Variable
Width
Constant
Constant
Minimum radiation, I min (kW/m 2 )
25
25
Energy efficiency, ηen(%)
56.9
50.0
Energy efficiency is emphasized to review the overall solar energy conversion under various
circumstances
placement in the transversal plane. Choudhury et al. [34] have recommended the
installation of uniform reflector widths at non-uniform reflector distances throughout
the field. However, this was concluded to decrease the blocking impact without optimizing the reflector field set of design variables. Thereafter, researchers optimized
the reflector distances across the field for no blocking impacts when the sun is at the
zenith [32, 35, 36].
Various absorber shapes like tubular, triangular, horizontally flat, or vertically flat
with constant reflector width across the field are taken into account for these studies.
In 2012, the shading effect was the most important topic for the researchers. They
were trying to design a plant in which the shading effect was negligible. Conclusively,
they suggested that the shading effects can be minimized by placing the reflector in
such a way that it should be appropriate for a given sun orientation with a uniform
width across the field [36]. Later simplicity and practicability of the collector design
were focussed by other researchers [31, 32, 38]. They incorporated the idea of a
uniform reflector distance across the field in their projects.
Solar projects of Fresdemo and Puerto Errado were also constructed based on
the above idea. In order to match reflector layout with specific patterns, researchers
recommended the mounting reflectors at different heights across the field for the
ordinate reflector locations in the transversal plane. Considering the improvement of the optical efficiency, Chaves and Collares-Pereira (2009) mentioned the
etendue-matched reflector field, paired with a compact linear Fresnel design [39–
41]. However, researches on the ordinate reflector locations in the transversal plane
G. Kumar and H. Gupta
Table 3 Effect of location, configuration, and orientation on efficiency [33]
Orientation
North–South
East–West
Latitude(N)
37°
No. of reflectors
20
10
Tilt(°C)
0
0
Shift
Variable
Variable
Width
Constant
Constant
Minimum rad., I min (kW/m 2 )
25
25
Energy efficiency, ηen(%)
46.0
46.1
Latitude(N)
24°
No. of reflectors
20
10
Tilt(°C)
0
0
Shift
Variable
Variable
Width
Constant
Constant
Minimum radiation, I min (kW/m 2 )
25
25
Energy efficiency, ηen(%)
56.9
50.0
Energy efficiency is emphasized to review the overall solar energy conversion under various
circumstances
placement in the transversal plane. Choudhury et al. [34] have recommended the
installation of uniform reflector widths at non-uniform reflector distances throughout
the field. However, this was concluded to decrease the blocking impact without optimizing the reflector field set of design variables. Thereafter, researchers optimized
the reflector distances across the field for no blocking impacts when the sun is at the
zenith [32, 35, 36].
Various absorber shapes like tubular, triangular, horizontally flat, or vertically flat
with constant reflector width across the field are taken into account for these studies.
In 2012, the shading effect was the most important topic for the researchers. They
were trying to design a plant in which the shading effect was negligible. Conclusively,
they suggested that the shading effects can be minimized by placing the reflector in
such a way that it should be appropriate for a given sun orientation with a uniform
width across the field [36]. Later simplicity and practicability of the collector design
were focussed by other researchers [31, 32, 38]. They incorporated the idea of a
uniform reflector distance across the field in their projects.
Solar projects of Fresdemo and Puerto Errado were also constructed based on
the above idea. In order to match reflector layout with specific patterns, researchers
recommended the mounting reflectors at different heights across the field for the
ordinate reflector locations in the transversal plane. Considering the improvement of the optical efficiency, Chaves and Collares-Pereira (2009) mentioned the
etendue-matched reflector field, paired with a compact linear Fresnel design [39–
41]. However, researches on the ordinate reflector locations in the transversal plane