Contact Us

加拿大28app下载 Add:Wenzhou Industrial Park,changle,shandong

Zip:262400

Tel:0536-6285503

Fax:0536-6289919

E-mail:

xiaoshoubu@kaiyuandianzi.com

加拿大28app下载 zerlinda@clkydz.com.cn

Industry News

Module radiator selection

Date:2016-09-12 15:02:00 From: Browsing times:
        The following factors must be taken into account when selecting a radiator:
Module operating current size, in order to determine the required cooling area;
The use of the environment, according to which can determine what the cooling way - natural cooling, forced air cooling, or water cooling;
        The shape, the volume of the device, the size of the space of the heat sink is determined, so as to determine the shape of the radiator.
Generally speaking, most users will choose aluminum radiator.
        The calculation formula of the radiator length is given below:
Module required cooling area = (radiator perimeter) * (radiator length) + (sectional area) x 2
The heat dissipation area of the module is the reference value given in the module characteristic parameter table. The perimeter and section area of the radiator can be found in the sample of the radiator manufacturers. In the use of power devices, the most important is how to make the heat generated by the effective distribution to obtain high reliability.
        The most common method of heat dissipation is to install the device on the radiator, the heat radiation board will heat radiation to the surrounding air, as well as through natural convection to distribute heat.
Generally, heat flow from the heat sink to ambient air (P) can be expressed by the following example.
P=hA ETA Delta T where h is the total heat radiator conductivity (W/cm2 C), A surface area of the radiator (cm2), ETA for radiator efficiency, Delta T is the highest temperature and the ambient temperature of the radiator difference (C). In the formula, h is composed of radiation and convection is determined by the shape of the radiator is determined. In short, the larger the surface area of the radiator, the greater the difference between the temperature and the environment temperature, the more effective the heat radiation of the heat sink.
        (1) radiation heat dissipation
        Approximate expression of radiation heat dissipation
Hr=2.3 * 10-11 * e (T/2+237) 3 (W/cm2 C)
Type E is surface emissivity, surface condition and change with the radiator. Surface grinding and polishing products e =0.05 ~ 0.1 is the radiation rate range. However, the radiator surface coated with paint, after oxidation can make e =1
        (2) convection heat dissipation
        When the power device is installed on the frame of the device, the convective heat radiation is more effective than the radiation heat radiation. In the air of a large air pressure, the transmission rate of the convection heat sink is approximated by a lower expression.
Hc=4.3 * 10-4 * (T/H) 1/4 (W/cm2 C)
In the formula, H is the height of the vertical direction of heat dissipation. The distance between the heat sink is set at H1/4 (CM). In short, the vertical direction of the radiator is longer than the horizontal direction is more effective.
        (3) the radiator efficiency
        If the heat sink is made of thin material, the farther away from the heat source, the lower the surface temperature, the worse the heat radiation effect is. The above formula is assumed that the temperature is evenly distributed, and in fact, the lower surface temperature of the edge of the heat sink.

 

Previous:Buy a light bulb "lumen" or lighting standard
Next:Technical specification for heat sink extrusion加拿大28app下载


Contact/联系方式

Address:Wenzhou Industrial Park, Changle County, Shandong
Tel:0536-6285503
Fax:0536-6289919
E-mail: xiaoshoubu@kaiyuandianzi.com
zerlinda@clkydz.com.cn
加拿大28app下载

Culture/加拿大28app下载

Mission:加拿大28app下载Create green wealth to build a happy enterprise

Core values:Customer value struggle is the focus of this

Four traits:加拿大28app下载Enthusiastic attention Houde innovation

Care/关注我们

Computer version

加拿大28app下载Mobile Edition

皇冠体育 双色球机选 万丰国际赌场 加拿大28信誉平台 皇冠足彩 爱乐透彩票 保赢投注法 天天中彩票app 江苏快3 北京快乐8怎么买 真人百家乐平台复制打开网址【82324.com】 真人百家乐平台复制打开网址【82324.com】 真人百家乐平台复制打开网址【82324.com】 真人百家乐平台复制打开网址【82324.com】 真人百家乐平台复制打开网址【82324.com】 北京赛车平台复制打开网址【82324.com】 澳门百家乐平台复制打开网址【82324.com】 秒速赛车平台复制打开网址【82324.com】 秒速赛车平台复制打开网址【82324.com】 秒速飞艇平台复制打开网址【82324.com】 重庆时时彩平台复制打开网址【82324.com】 重庆时时彩平台复制打开网址【82324.com】 重庆时时彩平台复制打开网址【82324.com】 加拿大28平台复制打开网址【82324.com】 加拿大28平台复制打开网址【82324.com】 加拿大28平台复制打开网址【82324.com】 秒速快3平台复制打开网址【82324.com】 秒速快3平台复制打开网址【82324.com】 秒速快3平台复制打开网址【82324.com】 彩票开户平台复制打开网址【82324.com】 彩票开户平台复制打开网址【82324.com】 幸运快乐8平台复制打开网址【82324.com】 幸运快乐8平台复制打开网址【82324.com】 幸运快乐8平台复制打开网址【82324.com】 幸运快乐8平台复制打开网址【82324.com】 幸运28平台复制打开网址【82324.com】 幸运28平台复制打开网址【82324.com】 幸运28平台复制打开网址【82324.com】 快乐赛车平台复制打开网址【82324.com】 快乐赛车平台复制打开网址【82324.com】 快乐赛车平台复制打开网址【82324.com】 太阳城娱乐平台复制打开网址【82324.com】 太阳城娱乐平台复制打开网址【82324.com】 秒速赛车平台复制打开网址【82324.com】 秒速赛车平台复制打开网址【82324.com】 盛世彩票平台复制打开网址【82324.com】 盛世彩票官网 复制打开网址【82324.com】 盛世彩票官网 复制打开网址【82324.com】 香港马会资料平台复制打开网址【82324.com】 香港马会资料平台复制打开网址【82324.com】 香港马会资料平台复制打开网址【82324.com】 香港马会资料平台复制打开网址【82324.com】 大发彩票平台复制打开网址【82324.com】 大发彩票平台复制打开网址【82324.com】 大发彩票平台复制打开网址【82324.com】 迪士尼彩票官网平台复制打开网址【82324.com】 加拿大28预测平台复制打开网址【82324.com】 加拿大28预测平台复制打开网址【82324.com】 加拿大28预测平台复制打开网址【82324.com】 太阳城平台复制打开网址【82324.com】 太阳城平台复制打开网址【82324.com】 幸运飞艇平台复制打开网址【82324.com】 幸运飞艇平台复制打开网址【82324.com】
分享到:QQ空间新浪微博腾讯微博人人网微信