Optical design optimization for improved lamp-reflector units in high-flux solar simulators
Applied Optics
|October 18, 2022
Summary
This study optimizes high flux solar simulators for solar thermal applications using ray-tracing. Enhanced reflector designs achieve higher peak fluxes and radiative power, improving performance for concentrated solar power technologies.
Area of Science:
- Solar Energy Engineering
- Optical Physics
- Materials Science
Background:
- High flux solar simulators (HFSS) are crucial for lab-scale testing of concentrating solar power (CSP) technologies.
- Current HFSS designs require optimization for enhanced optical performance in solar thermal and thermochemical applications.
Purpose of the Study:
- To numerically enhance the optical performance of HFSS by optimizing ellipsoidal reflector geometry.
- To evaluate the impact of different focal lengths and xenon arc lamp powers on radiative flux characteristics.
Main Methods:
- Utilized Monte Carlo ray-tracing technique to model and evaluate optical performance.
- Optimized ellipsoidal reflector geometries at focal lengths of 1600, 1800, and 2000 mm.
- Modeled seven-lamp hexagonal configurations and xenon arc lamps (3000-5000 W).
Main Results:
- Achieved theoretical peak fluxes of 7.2-14.3 MW/m² and radiative powers of 5.06-10.4 kW.
- Optimized designs showed potential improvements of up to 36% in peak flux and 17.9% in power compared to commercial reflectors.
- Identified design alternatives for low-rated power sources and varying focal lengths.
Conclusions:
- Optimized HFSS designs significantly enhance optical performance for solar thermal and thermochemical applications.
- The study provides valuable insights for selecting suitable light sources and reflector configurations to improve HFSS efficiency.
- Numerical optimization offers a pathway to more effective and simplified solar simulator designs.
