A novel 2-stage dish concentrator with improved optical performance for concentrating solar power plants

作者：Wang, Jun; Yang, Song; Jiang, Chuan; Yan, Qianwen; Lund, Peter D.^*

来源：Renewable Energy, 2017, 108: 92-97.

DOI：10.1016/j.renene.2017.02.059

• CSP
• Solar dish
• Solar tower
• Overlap method
• Ray-tracing

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 (beta) and the intercept factor (gamma) 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 beta = 15,498 and gamma = 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.

• 出版日期2017-8
• 单位东南大学