An Improved Light Efficiency Led Array Design by Increasing Uniformity for Pea Sprouts
openalex（2024）
Abstract
Light distribution is one of the important factors affecting plant growth in facility lighting. However, the traditional lighting has the problem of uneven illumination, which increases the difficulty of cultivation management and brings challenges to standardized plant production. Achieving the best light environment is of great significance to the high efficiency production. In order to effectively solve the problem of uneven distribution of light in the planting layer, this study proposes a high light efficiency LED array design by increasing uniformity based on the improved genetic algorithm. It has been verified by optical simulation, spectrometer measurement and the pea sprouts cultivation. The simulation results showed that the illumination uniformity of optimized LED array and traditional square LED array were 91.72% and 85.74% respectively. The uniformity of illuminance measured by spectrometer were 92.40% and 80.11% respectively. In addition, the effects of two LED arrays on the growth of pea sprouts were compared. The total light intensity of the optimized LED array was reduced by 20.12%, but the yield of pea sprouts increased by 8.58%. The light intensity needed to produce pea sprouts per unit mass was reduced by 26.46%, and the energy efficiency and economic efficiency were also improved. Therefore, the LED array designed based on improved genetic algorithm has high illumination uniformity and light use efficiency, and provides a new idea for pea sprout production and lighting optimization strategy.
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Key words
Plant Development,Particle Swarm Optimization,Light Regulation,Optimization
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