因此，只需将物流之间的换热温差降低即可达到节能降耗的目的。
Therefore, reducing the temperature difference between the logistics can achieve energy saving purposes.
初始换热温差ITD值的优化是直接空冷电站设计过程中较为关键的部分，关系到整个电站设计是否经济、合理。
The optimization of Initial Temperature Difference (ITD) is the relatively key part in the process of the design of the direct air cooling power station.
窄缝通道具有结构紧凑、换热温差低等优点，因此该无源强化传热技术被广泛应用在微电子、低温制冷、化工及其航空航天等领域。
Heat transfer in narrow channel has lots of advantages such as compact structure, low heat transfer temperature difference and high efficiency and so on.
降低浸镀锌液的换热系数，采用小角度快速浸入可以降低焊缝区域温差。
The temperature difference of welding zone can be decreased with small dipping angle, high dipping speed and low heat exchange coefficient of dipping Zn liquid.
提出采用虚拟温度法，确定各流股匹配换热的传热温差；
The pseudo temperature method is used to determine the heat transfer approach temperature of each stream.
比较了有无对流换热对窑内温度分布的影响，得出对流换热对改善温度场和减小砖坯的表面温差有一定作用；
The affection of heat convection to temperature field is discussed, and it is found that the heat convection can weak the temperature difference on stock surface, and improve temperature field.
比较了有无对流换热对窑内温度分布的影响，得出对流换热对改善温度场和减小砖坯的表面温差有一定作用；
The affection of heat convection to temperature field is discussed, and it is found that the heat convection can weak the temperature difference on stock surface, and improve temperature field.
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