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Chemical Engineering

Finned-Tube Heat Exchanger Flow Testing

Description

Heat exchangers move heat from one fluid to another. Shell and tube exchangers and plate exchangers are two common types. In a shell and tube exchanger, one fluid flows through a set of tubes while a second fluid flows around them to cool or heat the first stream. In a plate heat exchanger, fluids move between closely joined...

Transcript

换热器用于在两种介质之间传递热量,广泛应用于从汽车散热器到大型化工厂的各种场景。常见的换热器设计包括壳管式换热器和翅片管式换热器。这些换热器通过一系列管子和翅片将热量从热流体传递给冷流体。了解传热效率对于优化换热器设计及其在更大系统中的集成至关重要。本视频将介绍换热器的工作原理,演示如何计算翅片管式换热器的传热系数和效率,并讨论相关应用。

现在,让我们探讨换热器的工作原理,并分析影响其效率的基本原理。换热器中的热量传递是由被物理屏障隔开但紧密接触的流体之间产生的。这些流体可以并流或逆流流动。热量传递由流体之间的局部温差驱动。进入换热器的两种流体中,较热的流体将以较低的温度流出,而较冷的流体则将以较高的温度流出。通过在流动区域增加翅片,可以增大可用于传热的表面积,从而提高传热...

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