为了提高马尾松胶合板的阻燃性能,以膨涨型聚氨酯防火涂料为研究对象,采用美国阿特拉斯(ATLA S)公司生产的HRR3热释放率系统和配合HC-2氧指数测定仪、XSHF-1防火涂料(小室法)等先进阻燃检测设备,按照美国航空标准(FAA)测试试样,研究阻燃...为了提高马尾松胶合板的阻燃性能,以膨涨型聚氨酯防火涂料为研究对象,采用美国阿特拉斯(ATLA S)公司生产的HRR3热释放率系统和配合HC-2氧指数测定仪、XSHF-1防火涂料(小室法)等先进阻燃检测设备,按照美国航空标准(FAA)测试试样,研究阻燃剂(成炭剂、脱水炭化催化剂、发泡剂)不同添加量对马尾松胶合板阻燃性能的影响。结果表明:当阻燃剂按80%的比例加入时,马尾松胶合板的阻燃性能最好,试件的氧指数值显著增大,最高热释放率、2 m in总热释放量和5 m in内总热释放量显著降低。展开更多
LED lighting has problems such as short life span, power reduction due to the LED chip's heat, and decreased luminance efficiency etc. Many studies on the optimization of the thermal performance of LEDs have been ...LED lighting has problems such as short life span, power reduction due to the LED chip's heat, and decreased luminance efficiency etc. Many studies on the optimization of the thermal performance of LEDs have been conducted actively to solve these problems. The present study changes the fin shape and intervals of various heat sink designs so that LED can effectively produce a thermal effect. The water-cooling heat release system and the heat pipe methods show higher thermal performance results than the existing systems; however, the system is of high cost and requires a large-scale apparatus. This study carried out a numerical analysis of the thermal control system by applying heat flux and heat sink properties as an active heat release system using the commercial code ANSYS ver. 13.0 and verified the validity of the new heat sink design for temperature distribution analysis.展开更多
文摘为了提高马尾松胶合板的阻燃性能,以膨涨型聚氨酯防火涂料为研究对象,采用美国阿特拉斯(ATLA S)公司生产的HRR3热释放率系统和配合HC-2氧指数测定仪、XSHF-1防火涂料(小室法)等先进阻燃检测设备,按照美国航空标准(FAA)测试试样,研究阻燃剂(成炭剂、脱水炭化催化剂、发泡剂)不同添加量对马尾松胶合板阻燃性能的影响。结果表明:当阻燃剂按80%的比例加入时,马尾松胶合板的阻燃性能最好,试件的氧指数值显著增大,最高热释放率、2 m in总热释放量和5 m in内总热释放量显著降低。
基金Financial aid from the Korea Ministry of Education through the Brain Korea 21 Project [HRD Center for Convergence Mechanical System Design] is gratefully acknowledgedthe financial support of Sungkyunkwan University for his sabbatical year
文摘LED lighting has problems such as short life span, power reduction due to the LED chip's heat, and decreased luminance efficiency etc. Many studies on the optimization of the thermal performance of LEDs have been conducted actively to solve these problems. The present study changes the fin shape and intervals of various heat sink designs so that LED can effectively produce a thermal effect. The water-cooling heat release system and the heat pipe methods show higher thermal performance results than the existing systems; however, the system is of high cost and requires a large-scale apparatus. This study carried out a numerical analysis of the thermal control system by applying heat flux and heat sink properties as an active heat release system using the commercial code ANSYS ver. 13.0 and verified the validity of the new heat sink design for temperature distribution analysis.
