Product Code:SAE AIR1168/2
Title:Heat and Mass Transfer and Air-Water Mixtures (STABILIZED Jul 2011)
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.
基本信息
| 标准名称： | 用于核反应堆的辐射探测器 特性及其测试方法 |
| 英文名称： | Radiation detectors for nuclear reactors--Characteristics and test methods |
| 中标分类： |
能源、核技术 >>
核仪器与核探测器 >>
核探测器 |
| ICS分类： |
计量学和测量、物理现象 >>
辐射测量
|
| 替代情况： | GB 7164-1987;被GB/T 7164-2004代替 |
| 发布日期： | 1994-08-08 |
| 实施日期： | 1995-04-01 |
| 首发日期： | 1987-01-07 |
| 作废日期： | 2004-06-01 |
| 归口单位： | 中国核工业集团公司 |
| 起草单位： | 北京核仪器厂 |
| 出版日期： | 1900-01-01 |
| 页数： | 0 |
适用范围
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前言
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所属分类： 能源 核技术 核仪器与核探测器 核探测器 计量学和测量 物理现象 辐射测量