What is it about?
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.
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Why is it important?
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.
Perspectives
This is a novel solar concentrator design which could be employed for solar tower concepts.
Professor Peter D. Lund
Aalto University
Read the Original
This page is a summary of: A novel 2-stage dish concentrator with improved optical performance for concentrating solar power plants, Renewable Energy, August 2017, Elsevier,
DOI: 10.1016/j.renene.2017.02.059.
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