Electro-optical characteristics of an innovative LED luminaire with an LED matrix cooling system based on heat pipes

Abstract

Widespread use of energy-saving LED lighting systems powered by renewable energy sources, solar energy in particular, will contribute to the improvement of global ecology. One of the structural elements of such lighting systems is LED luminaire. The authors of this article perform a first ever experimental study of electro-optical characteristics of the basic version of a compact high-power LED luminaire for indoor use. The particular feature of this lighting device is that its cooling system for the LED light source is based on heat pipes and concentric cooling rings. Such design allows ensuring the required cooling efficiency of the LED matrix. The revealed trends in optical and electrical parameters during temperature stabilization indicate that the proposed cooling system is highly efficient in maintaining normal thermal conditions of LED light sources with a power of up to 140.7 W and a luminous flux of up to 15083 lm. The results on determining spatial distribution of luminous flux of these luminaires indicate that they may be used for lighting large rooms with high ceilings. Scaling the basic modular design version of the cooling system allows increasing the power of the LED light source up to 600 W.

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“…Our strategy for the next decade included theoretical consideration of new effects in low-dimensional semiconductor structures [7][8][9][10], establishment of new principles and approaches to create and study functionality of lasers and LEDS [11][12][13][14][15][16][17][18], clarification of some peculiarities in new hetero-and hybrid structures [19][20][21], application of sensor and photovoltaic cells [22][23][24][25][26][27], use of semiconductor, optic and quantum electronic devices in ecology, communications, renewable energetics and health care [28][29][30][31][32][33][34][35][36][37].…”

Uncertainty Estimation of Luminous Flux for LED Lamps Due to the Control of Electric Power

“…Characterization of LEDs is becoming increasingly important in commerce and trade, it can be achieved using either an integrating sphere or a goniophotometer. [22][23][24] Experimentally, flux has recorded significant discrepancies in measurements between 40 and 50 percent when compared to the conventional light sources which normally agree within a few percent amongst different companies. 25 This is due to the major variations in LEDs' spectral and spatial characteristics compared to the conventional light sources.…”