Model construction and performance research of the optimized compound parabolic concentrator based on critical truncation and multi-section congruent

Abstract

Solar CPC (Compound Parabolic Concentrator, CPC) has a limited ability to collect solar radiation at the top of the reflection surface, and the energy flux distribution on the absorber surface is not uniform. The paper presents an optimized model of N-CPC (No-Gap Escape CPC, N-CPC) that is constructed through critical truncation and multi-section congruent, and the model parameters are determined using the principle of non-imaging optical edge rays, and the theoretical reliability and optical performance are verified through laser experiments and simulation analysis. The research results show that compared with N-CPC with an equivalent geometrical concentration ratio, O-CPC (Optimized CPC, O-CPC) effectively enhances the acceptable range of incident rays, with an average optical efficiency of 40.60%, which beam radiation collection is increased by 3.06% and diffuse radiation collection is increased by 38.92%, effectively reducing the peak energy flux distribution. Combined with economic analysis, O-CPC has a broader application prospect.