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The solar concentrators used in CSP systems can often also be used to provide industrial process heating or cooling, such as in solar air conditioning. Concentrating technologies exist in four optical types, namely parabolic trough, dish, concentrating linear Fresnel reflector, and solar power tower. [35]
Their first system was a linear-trough concentrator system that used a point focus acrylic Fresnel lens focusing on water-cooled silicon cells and two axis tracking. Cell cooling with a passive heat sink and use of silicone-on-glass Fresnel lenses was demonstrated in 1979 by the Ramón Areces Project at the Institute of Solar Energy of the ...
Compact linear Fresnel reflector. A compact linear Fresnel reflector (CLFR) – also referred to as a concentrating linear Fresnel reflector – is a specific type of linear Fresnel reflector (LFR) technology. They are named for their similarity to a Fresnel lens, in which many small, thin lens fragments are combined to simulate a much thicker ...
For line-focus systems, such as a trough concentrator or a linear Fresnel lens, the acceptance angle is one dimensional, and the concentration has only weak dependence on off-pointing perpendicular to the focus direction. Point focus systems, on the other hand, are sensitive to off-pointing in both directions.
Fresnel lenses may be used as components of Köhler illumination optics resulting in very effective nonimaging optics Fresnel-Köhler (FK) solar concentrators. [64] Linear A non-imaging linear Fresnel lens uses straight segments whose cross sections are straight lines rather than arcs. These lenses focus light into a narrow band.
A Concentrated Photovoltaic Thermal system (CPVT) consists of four parts including the absorber, concentrator, solar radiation tracker and thermal absorber. [ 5 ] The schematic of CPVT system with active ventilation. As the CPVT works with the beam radiation, the absorber and concentrator should follow the position of the sun to maximize the ...
Prototypes of Fresnel lens concentrators have been produced for the collection of thermal energy by International Automated Systems. [57] No full-scale thermal systems using Fresnel lenses are known to be in operation, although products incorporating Fresnel lenses in conjunction with photovoltaic cells are already available. [58]
For this reason, almost all multi-junction cell research for terrestrial use is dedicated to concentrator systems, normally using mirrors or Fresnel lenses. Using a concentrator also has the added benefit that the number of cells needed to cover a given amount of ground area is greatly reduced.