2.3.2. Fresnel collector
The Fresnel collector (Figure 2a) is a linear concentrating solar thermal collector for industrial process heat
applications, used as a solar boiler. The collector is made up of 4.06 m long modules, defined by the length of the
SCHOTT PTR70 vacuum absorber tube. Three modules are depicted in Figure 3 below. The total collector width is
7.5 m, while the aperture width – the cumulative width of the 11 primary mirror rows – is 5.5 m. The total height of