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

Jun Wang, Song Yang, Chuan Jiang, Qianwen Yan, Peter D. Lund*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

25 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)92-97
Number of pages6
JournalRenewable Energy
Volume108
DOIs
Publication statusPublished - 1 Aug 2017
MoE publication typeA1 Journal article-refereed

Keywords

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

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