• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2015, Vol. 51 ›› Issue (12): 153-160.doi: 10.3901/JME.2015.12.153

• 可再生能源与工程热物理 • 上一篇    下一篇

电器空气冷却系统受海拔影响的理论分析

黄延平1, 2   

  1. 1.无锡工艺学院机电系 无锡 214206;
    2.长春理工大学机电工程学院 长春 130022
  • 出版日期:2015-06-20 发布日期:2015-06-20
  • 基金资助:
    国家科技部技术创新资助项目(12C2621220133)

Theoretical Analysis of the Impact of Altitude on Electrical Equipment of Air Cooling System

HUANG Yanping1, 2   

  1. 1.Department of Mechanical Engineering, Wuxi Institute of Art&Technology, Wuxi 214206;
    2.College of Mechanical and Electric Engineering, Changchun University of Science and Technology, Changchun 130022
  • Online:2015-06-20 Published:2015-06-20

摘要: 电器设备的散热能力与海拔高度有着密切的关系,不同的海拔高度空气的性能差别很大,比如空气的密度、压力、温度等都会因为海拔高度的变化而变化。这些参数对电器的散热有重要的影响。为了准确地进行不同海拔高度电子设备的热设计,建立不同海拔高度风扇主要参数数学模型,研究流体介质的流动状态变化对传热的影响,引入海拔高度参数,对原来建立在海平面上的传热方程进行修正,通过实例计算和Icepak14.5仿真对文中的理论进行验证,其结果也符合国际电工试验数据,为计算机等电器设备数字化热设计提供参考。

关键词: 层流, 电器热设计, 风扇定律, 海拔高度, 湍流

Abstract: Heat dissipation by electric appliances is closely related to the height above sea level. The performance of air cooling systems significantly differs in different heights above sea level. For example, the density, pressure, and temperature of air change with the change in altitude. These parameters critically affect the heat dissipation of electric appliances. To accurately create a thermal design of electric appliances based on different altitudes, a mathematical model of the main parameters of a fan at different altitudes is established. The effect of the changes in the flow state of fluid medium on heat transfer is also determined. By introducing altitude parameters, the originally established heat transfer equation for sea level is modified. The theory proposed in this study is verified through practical calculation and Icepak14.5 simulation. Results are consistent with international electrotechnical experimental data. It also provides a reference for the digital thermal design of computers and other electric appliances.

Key words: altitude, electric thermal design, fan’s law, laminar, turbulence

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