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DIN VDE 0745-102-1990 易燃喷涂材料用静电喷涂设备的选择.安装和使用的规定.第2部分:用限能为5mJ手动静电粉状物喷涂枪及其附件

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【英文标准名称】:Requirementsfortheselection,installationanduseofelectrostaticsprayingequipmentforflammablematerials;part2:hand-heldelectrostaticpowderspraygunswithanenergylimitof5mJandtheirassociatedapparatus;germanversionEN50053-2:1989
【原文标准名称】:易燃喷涂材料用静电喷涂设备的选择.安装和使用的规定.第2部分:用限能为5mJ手动静电粉状物喷涂枪及其附件
【标准号】:DINVDE0745-102-1990
【标准状态】:作废
【国别】:德国
【发布日期】:1990-09
【实施或试行日期】:1990-09-01
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;电气工程;爆炸性环境;手持喷涂设备;喷射;规范(审批);选择;静电装置;装配;可燃性环境;静电学;电驱动装置;检验;易燃材料
【英文主题词】:
【摘要】:
【中国标准分类号】:A29
【国际标准分类号】:87_100
【页数】:10P;A4
【正文语种】:德语


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Product Code:SAE AIR1168/2
Title:Heat and Mass Transfer and Air-Water Mixtures
Issuing Committee:Ac-9 Aircraft Environmental Systems Committee
Scope:Heat transfer is the transport of thermal energy from one point to another. Heat is transferred only under the influence of a temperature gradient or temperature difference. The direction of heat transfer is always from the point at the higher temperature to the point at the lower temperature, in accordance with the second law of thermodynamics. The fundamental modes of heat transfer are conduction, convectoin, and radiation. Conduction is the net transfer of energy within a fluid or solid occurring by the collisions of molecules, atoms, or electrons. Convection is the transfer of energy resulting from fluid motion. Convection involvs the processes of conduction, fluid motion, and mass transfer. Radiation is the transfer of energy from one point to another in the absence of a transporting medium. In practical applications several modes of heat transfer occur simultaneoulsy. For example, aerodynamic heating of a vehicle surface includes convection to the surface, radiation away from the surface, and conduction through the surface structure. Since the three modes of heat transfer obey different laws, a real insight into such a problem can be gained only after they have been studied separately.