Simulation and experimental validation of solar radiation distribution on the absorber of a line-axis asymmetric compound parabolic concentrator

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Abstract

This paper reports the development and application of a new practical photovoltaic (PV) cells based device to measure the solar radiation flux produced by non-imaging Compound Parabolic Concentrators (CPCs) on cylindrical absorbers. The flexible experimental device comprises 12 discrete miniature PV panels that measure solar radiation on the surface of a cylindrical absorber. The device has been used to evaluate the performance of an asymmetric CPC system and results validated with a computer-based Ray Tracing Model. The study attained significant agreement between outdoor results of the experimental device and results of the ray tracing simulation with a difference of <9% in optical efficiencies. The non-imaging reflector illuminates a targeted section of the absorber of a horizontal east-west thermal diode Integrated Collector Storage Solar Water Heater. During outdoor testing, the experiments indicated a local concentration ratio reaching 1.4 suns on the targeted section of the absorber vessel surface for incidence angles -30 °≤θ i≤30 °, confirming technical suitability of the asymmetric CPC for deployment in locations at equatorial latitudes.

Original languageEnglish
Pages (from-to)36-52
Number of pages17
JournalSolar Energy
Volume198
Early online date23 Jan 2020
DOIs
Publication statusPublished - 1 Mar 2020

Keywords

  • Solar cogeneration
  • Flux distribution
  • CPC
  • optical efficiency
  • PV cells
  • ray tracing

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