High power led-based light engine with double linear fresnel lenses for solar simulators

Abstract

As the use of solar power is growing, performance testing has become one of the main themes to guarantee the safety of photovoltaic instruments. Light sources are the most critical components of sun simulators used for experiments with solar cells. Rapid developments in light-emitting diodes (LEDs) have provided sufficient tools for designing LED solar simulations to imitate the sun accurately. LEDs have many benefits over presently used lampsbased technology. But these advantages were not harnessed due to the specific spectrum matching standards, Temporal instability, and uniform output light on a test area. Secondary optics are used to collimate the light rays into a controlled beam that will bring that full intensity to the needed area. The main purpose of this study is to design and fabricate a high-power light engine for solar simulators based on LED integrated with a light concentrator using Fresnel lenses to reach more than one sun output. To aim, this objective main part of the research focused on selecting appropriate high-power Cheap On Board (COB) LED with the utilization of lower quantity of light sources while the specification of American Society for Testing Materials (ASTM) standards meets. The other important component considered to fabricate the device was the Fresnel lens to match with COBs and other component dimensions. The experimental results have been obtained and presented in a separate chapter. The overall objective of the research is to design and fabricate a LED-Based high-power light engine for solar simulators achieved with almost 5 sunlight output. The performed light engine could be used to construct a highflux solar simulator in the future.

Date	21 Oct 2021
Original language	American English
Awarding Institution	École de technologie supérieure
Supervisor	Ricardo Izquierdo (Supervisor)