Thermal Analysis In Fixed, Flowed And Airless Environment For Cooling In Led Luminaires

Abstract

In this study, a simulation study was conducted for the loss of efficiency caused by the heat emitted by the LED chips. The temperature change of LED luminaire was analysed for three different scenarios using finite element method. Due to the increase in the internal temperature of the luminaire and due to the air effect inside the LED luminaires, failure of the LEDs has been tried to be prevented. For this purpose, a passive cooling method was proposed in the simulation environment. So, in high power LED luminaires, the high heat emitted by the LED chips is reduced to low heat by an air flow method. In this way, efficiency in LED outputs has been achieved.

LED Aydınlatma Sistemlerinde Derin Öğrenme Tabanlı Harmonik Tahminleme

“…Bu sistemler enerji verimliliği bakımından %90'lara varan iyileştirme sağlayabilmektedir. Ancak enerji verimliliği yönüyle büyük avantaja sahip olan bu sistemler, mimarilerinde bulunan yarıiletken elemanlardan oluşan güç elektroniği temelli sürücü devreleri nedeniyle enerji kalitesinde bozulmalara yol açmaktadır [3]- [5]. Harmonik adı verilen bu bozulmalar, gerilim dalgalarında da ortaya çıkmakla birlikte en büyük etkiyi akım dalga şeklinde göstermektedir.…”

Design and Analysis of High-Efficient Driver Model for LED Luminaires

“…Losses due to drivers are one of the biggest drawbacks of LEDs and this causes low efficiency. In addition, such drivers are formed in larger volumes for necessity of bigger cooling devices because the illumination level of LEDs affected by temperature [12,13]. The proposed design also focused to overcome this problem.…”