A novel 2-stage 4-mirror dish concentrator is proposed.
Overlapping method is used for mirror optimization.
High concentration ratio and intercept factor was achieved with the new design.
The new concentrator has a compact mirror design and reduces receiver size.
Here we propose a novel 2-stage dish concentrator system for concentrating solar power plants based on the so-called overlap method, which improves both the radial flux concentration ratio (β) and the intercept factor (γ) of the concentrator. The 2-stage dish is composed of paraboloid primary and hyperboloid secondary mirrors having a special hollow structure enabling the mirrors to overlap, but avoiding excess shading. Geometric and optical analyses with ray-tracing show maximum values of β = 15,498 and γ = 0.78. Also, the size of the focal spot could be reduced. The concept is applicable for solar tower concepts enabling more compact unit mirrors and reducing the receiver size.
- Solar dish;
- Solar tower;
- Overlap method;
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