Design Optimization of a High Power LED Matrix Luminaire

Abstract

This work presents a methodology for optimizing the layout and geometry of an m × n high power (HP) light emitting diode (LED) luminaire. Two simulators are used to analyze an LED luminaire model. The first simulator uses the finite element method (FEM) to analyze the thermal dissipation, and the second simulator uses the ray tracing method for lighting analysis. The thermal and lighting analysis of the luminaire model is validated with an error of less than 10%. The goal of the optimization process is to find a solution that satisfies both thermal dissipation and light efficiency. The optimization goal is to keep the LED temperature at an acceptable level while still obtaining uniform illumination on a target plane. Even though no optical accessories or active cooling systems are used in the model, the results demonstrate that it is possible to obtain satisfactory results even with a limited number of parameters. The optimization results show that it is possible to design luminaires with 4, 6 and up to 8 HP-LEDs, keeping the LED temperature at about 100 • C. However, the best uniformity on a target plane was found by the heuristic algorithm.

Indoor Agriculture: Measurement of The Intensity of LED for Optimum Photosynthetic Recovery

“…Currently, HP-LED widely applied to the headlamp of the car, flashlight, lighting fixtures, and so forth. [13] HP-LED is an energy-efficient building block that produces ideal lumen output for the latest lighting applications. HP-LED offers the best possible solid-state light source [14].…”

Adaptive Luminaire with Variable Luminous Intensity Distribution

“…The development and dissemination of semiconductor light sources has forced a new approach to luminaire design [1]. The specific nature of both spatial distribution of light and formation of the luminous surface of high-power electroluminescent sources means that they cannot be effectively used in the same luminaires as the discharge sources; thus, it is necessary to design new constructions where multi-source matrices are used [2][3][4]. Thanks to small dimensions of LED sources, it has become possible to limit dimensions of luminaires, which is associated with the widespread use of optical lens systems replacing reflector systems wherever it is desirable [5,6].…”

“…The monitoring and assessment of the risk of adverse health effects from long-term LED use is carried out [18][19][20]. Due to the radiation emission limits, luminaires can be classified into four risk groups: free of risk (0), low risk (1), moderate risk (2), and high risk (3), which have been defined in standardization documents together with measurement procedures [21][22][23]. Most general purpose luminaires should belong to groups (0) and (1) due to continuous exposure of people to their radiation.…”

“…Some high power luminaires can cause a moderate risk (2) then the threshold illuminance and threshold distance from the luminaire are determined. The high risk group (3) includes specialized luminaires used in industry and medicine for which the permissible exposure is specified in detail.…”

“…Some high power luminaires can cause a moderate risk (2) then the threshold illuminance and threshold distance from the luminaire are determined. The high risk group (3) includes specialized luminaires used in industry and medicine for which the permissible exposure is specified in detail. When there is a necessity for a change of the space arrangement in building structures, such as industrial production halls (Figure 1a), storage halls (Figure 1b), sales halls in large-format stores, exhibition halls, the lighting requirements also change.…”