کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7044685 | 1457086 | 2018 | 40 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Illuminance and heat transfer characteristics of high power LED cooling system with heat sink filled with ferrofluid
ترجمه فارسی عنوان
ویژگی های روشنایی و انتقال گرما از سیستم خنک کننده با قدرت بالا با فروسرخ حرارتی پر از فرروفیت
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کلمات کلیدی
فرفولید، سینک حرارتی، روشنایی، درجه حرارت، رهبری،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In the case of a high power LED (light emitting diode) cooling system using the ferrofluid, the illuminance characteristics, including the illuminance and the illuminance efficacy, as well as the heat transfer characteristics, including the temperature and the thermal resistances, were experimentally investigated under various input voltages and magnetic fields and compared with air and water working fluids. The temperatures of the LED surface, the heatsink surface, and the LED junction of the high power LED cooling system with ferrofluid all increased with a rise in the input voltages. The illuminance of the high power LED cooling system with the ferrofluid also increased with increases in the input voltage until an elapsed time of 1200â¯sec, but the illuminance of the high power LED cooling system dramatically decreased at 19.3â¯V, due to the increased power consumption. The junction temperature and the illuminance efficacy of the high power LED cooling system with the magnet decreased at all input voltages by 9.7% and increased by 6.9%, respectively, compared to those without the magnet. The high power LED cooling system with the ferrofluid at an elapsed time of 3600â¯sec showed 67.5% and 66.1% higher illuminances than those of the air and the water, respectively. As a result, the cooling and optical performances could be improved using the ferrofluid as the cooling liquid, and could be further enhanced by applying the external magnetic field. In addition, the designed LED cooling system with the thin fin heat sink filled with the ferrofluid is suggested as a potential vehicle headlamp considering the illuminance for visibility and effective cooling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 143, October 2018, Pages 438-449
Journal: Applied Thermal Engineering - Volume 143, October 2018, Pages 438-449
نویسندگان
Jae-Hyeong Seo, Moo-Yeon Lee,