基于烟囱效应的LED散热器设计毕业论文文档.doc

华侨大学 毕业设计（论文） 题目： 基于烟囱效应的LED散热器设计 Topic ： Chimney effect of LED heat sink design is based on 学 院 信息科学与工程学院 年级专业 2010级电子科学与技术B班 学生姓名 学 号 指导教师 完 成 日 期 2014 年5月 基于烟囱效应的LED散热器设计 摘要 在我国照明耗电中，城市公共照明占30%，每年支出285亿。半导体光源具有节能，寿命长等优点，若将其广泛用于城市公共照明，可节省大量能源，LED照明由于其节电、环保、长寿命，而被公认为下一带照明技术，将取代现有的各种照明技术【1】。LED为冷光源，怕热，有80％之多的电能转化为热能，必须有散热措施，虽然LED发光技术已有飞跃发展，有每瓦发光达200lm的报导，但LED散热却是LED照明中的大问题，但又还没得到有效解决的问题，成了LED照明灯普及发展道路上的拦路虎，在自然对流散热器中，可以增加散热表面积和提高气体流速来增强自然对流热交换，在散热器中，引入轻质的烟囱结构，就可以引入烟囱效应，从而提高气体流速，增强散热器自然对流的热交换能力，同时烟囱效应结构，也能减轻散热器的重量【2】。本文针对基于烟囱效应的LED散热问题做以下研究：首先引入LED灯具设计仿真软件Solid-works，对悬吊式LED灯具进行设计，然后利用Solid-works中的流体散热仿真模块flow simulation对LED灯具进行仿真，从LED温度剖面图获得温度参数，及温度的变化情况，再将LED灯具再设计，模拟出烟囱效应需要的模型，再次热学仿真，获得温度参数，最后对比两次温度测试结果，得出结论。 关键字 LED散热 烟囱效应 Solid-works Chimney effect of LED heat sink design is based on Abstract In our lighting consumption in urban public lighting accounts for 30% of annual spending 28.5 billion . Semiconductor light source with energy saving, long life and other advantages , if it is widely used in urban public lighting , can save a lot of energy , LED lighting because of its energy-saving , environmental protection, long life, and is recognized as the next area of lighting technology , will replace the existing various lighting technologies【1】. LED is cold light , heat intolerance, there are as many as 80% of energy is converted into heat , there must be cooling measures , although the LED light technology has been rapid development , has reached 200lm per watt luminous coverage , but the heat is LED LED lighting the big problem, but the problem has not been effectively addressed , the popularity of LED lighting has become the stumbling block on the road to development , the natural convection radiator , you can increase the cooling surface area and increasing gas flow rate