The Application of Thermal Solar Energy to High Temperature Processes: Case Study of the Synthesis of Alumina from Boehmite

Table 1

Fresnel lens specifications.

Diameter (mm)	889
Surface (m^2)	0.8
Thickness (mm)	3.17
Grooves (mm)	50 in 25
Focal distance (mm)	757
Circular focus diameter (mm)	8
Power density (W·cm^−2)	260
Solar radiation concentration	2644 times
Refractive index	1.49
Transmission (%)	92