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Modeling of Selected Lighting Parameters of LED Panel

Author

Listed:
  • Krzysztof Baran

    (Department of Power Electronics and Power Engineering, Rzeszow University of Technology, Wincentego Pola 2, 35-959 Rzeszow, Poland)

  • Antoni Różowicz

    (Department of Industrial Electrical Engineering and Automatic Control, Kielce University of Technology, 7 Tysiąclecia Państwa Polskiego Str., 25-314 Kielce, Poland)

  • Henryk Wachta

    (Department of Power Electronics and Power Engineering, Rzeszow University of Technology, Wincentego Pola 2, 35-959 Rzeszow, Poland)

  • Sebastian Różowicz

    (Department of Industrial Electrical Engineering and Automatic Control, Kielce University of Technology, 7 Tysiąclecia Państwa Polskiego Str., 25-314 Kielce, Poland)

Abstract

Semiconductor light sources are currently the fastest growing and most energy efficient group of light sources used in lighting technology. Their lighting parameters, such as luminous flux, correlated color temperature and color rendering index depend on the value of the forward current, as well as the temperature of the junction. LED source manufacturers usually specify, in data sheets, the effect of junction temperature and forward current on the luminous flux for individual light sources. The difficulty, however, is the correct determination of temperature and then lighting parameters, by simulation methods for multi-source lighting systems. Determining the junction temperature which affects lighting parameters is particulary important in the case of LED panels and luminaires, where thermally coupled LED sources shaping the output lighting parameters are in close proximity to each other. Additionally, other factors influencing the temperature distribution of sources, such as the design and geometry of the cooling system, the design of the printed circuit and thermal interface material used, should be considered. The article is a continuation of the publication in this journal where the influence of factors influencing the temperature distribution of the LED panel is presented. The purpose of the research in this article was to confirm the possibility of using CFD (Computational Fluid Dynamics) software, as well as to determine the accuracy of the results obtained in the temperature analysis of the multi-source LED panel, and in determining the output lighting parameters of the LED panel based on it. In this article, based on previously published research, a LED panel model with a cooling system was made, and then the CFD software determined the junction temperature of all light sources. The determined temperature of the LED sources constituted the basis for determining the output lighting parameters of the panel: luminous flux, color temperature and color rendering index. The simulation results were verified by real measurements on the constructed LED panel prototype. The LED panel temperature difference between the simulation results and the real results on the prototype did not exceed 5%. Moreover, the error of lighting parameters between the simulation results obtained and the results on the LED panel prototype in the worst case was 4.36%, which proves the validity and accuracy of simulation studies.

Suggested Citation

  • Krzysztof Baran & Antoni Różowicz & Henryk Wachta & Sebastian Różowicz, 2020. "Modeling of Selected Lighting Parameters of LED Panel," Energies, MDPI, vol. 13(14), pages 1-22, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:14:p:3583-:d:383311
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    References listed on IDEAS

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    1. Marcin Janicki & Tomasz Torzewicz & Przemysław Ptak & Tomasz Raszkowski & Agnieszka Samson & Krzysztof Górecki, 2019. "Parametric Compact Thermal Models of Power LEDs," Energies, MDPI, vol. 12(9), pages 1-10, May.
    2. Marcin Leśko & Antoni Różowicz & Henryk Wachta & Sebastian Różowicz, 2020. "Adaptive Luminaire with Variable Luminous Intensity Distribution," Energies, MDPI, vol. 13(3), pages 1-22, February.
    3. Augusto Della Torre & Gianluca Montenegro & Angelo Onorati & Sumit Khadilkar & Roberto Icarelli, 2019. "Multi-Scale CFD Modeling of Plate Heat Exchangers Including Offset-Strip Fins and Dimple-Type Turbulators for Automotive Applications," Energies, MDPI, vol. 12(15), pages 1-20, August.
    4. Krzysztof Baran & Antoni Różowicz & Henryk Wachta & Sebastian Różowicz & Damian Mazur, 2019. "Thermal Analysis of the Factors Influencing Junction Temperature of LED Panel Sources," Energies, MDPI, vol. 12(20), pages 1-20, October.
    5. Yu-Sheng Huang & Wei-Cheng Luo & Hsiang-Chen Wang & Shih-Wei Feng & Chie-Tong Kuo & Chia-Mei Lu, 2017. "How Smart LEDs Lighting Benefit Color Temperature and Luminosity Transformation," Energies, MDPI, vol. 10(4), pages 1-13, April.
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    2. Piotr Tomczuk & Marcin Chrzanowicz & Piotr Jaskowski & Marcin Budzynski, 2021. "Evaluation of Street Lighting Efficiency Using a Mobile Measurement System," Energies, MDPI, vol. 14(13), pages 1-25, June.
    3. Przemyslaw Tabaka, 2021. "Influence of Replacement of Sodium Lamps in Park Luminaires with LED Sources of Different Closest Color Temperature on the Effect of Light Pollution and Energy Efficiency," Energies, MDPI, vol. 14(19), pages 1-30, October.
    4. Krzysztof Górecki & Przemysław Ptak, 2021. "Compact Modelling of Electrical, Optical and Thermal Properties of Multi-Colour Power LEDs Operating on a Common PCB," Energies, MDPI, vol. 14(5), pages 1-21, February.
    5. Ram Adhikari & Dawood Beyragh & Majid Pahlevani & David Wood, 2020. "A Numerical and Experimental Study of a Novel Heat Sink Design for Natural Convection Cooling of LED Grow Lights," Energies, MDPI, vol. 13(16), pages 1-19, August.

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