9.6.- 传播热量

热力学定律处理的是能量传递和热与功之间的相互作用,但只是在平衡系统中。因此,它们可以让我们确定初始和最终状态,但对预测和量化中间过程没有用。传热提供了确定这些过程的方法。

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传热方式有三种。

  • 传导:在固体介质中发生的温度梯度的作用,使热量从温度较高的区域向温度较低的区域传递。单位时间内传导的热量与温度梯度乘以面积 A 成正比。
  • 对流:当流体与固体表面接触时,流体的颗粒与固体之间发生交换。有两个对流过程。
  • 自由对流:驱动力来自于流体颗粒间的密度差。与固体接触的颗粒改变了温度和密度,从而引起向上流动。
  • 强制对流:驱动力来自外部,使流体在表面移动。
  • 辐射:在没有介质的情况下,由于构成这些表面的原子或分子的电子构型发生变化,在不同温度下的两个表面之间通过辐射进行净热传递。辐射放出的热量由 Stefan-Boltzmann 定律给出。

阻止热量的传递是不可能的,但可以作用于传递的速度。研究传热的重要意义在于确定材料或配置,根据一定的参数优化热交换速率。

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传播热量 设备

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COMPUTER CONTROLLED HEAT TRANSFER SERIES - TSTCC
  • TSTCC
Available
9.6.- 传播热量

TSTCC

热传递研究系列,由计算机(PC)控制

The Computer Controlled Heat Transfer Series, "TSTCC", has been designed by EDIBON to study and compare different types of heat transfer on a small scale. It allows a wide range of heat transfer demonstrations and study the factors affecting and...
LINEAR HEAT CONDUCTION MODULE FOR TSTCC - TXC/CL
Available
9.6.- 传播热量

TXC/CL

线性热传导设备(用于TSTCC)

配件 TSTCC
TXC/CL. Linear Heat Conduction Module for TSTCC: study of the principles of linear heat conduction and to allow the measurement of the conductivity of different solid conductors and insulators.Bench-top unit to study the principles of linear heat...
RADIAL HEAT CONDUCTION MODULE FOR TSTCC - TXC/CR
Available
9.6.- 传播热量

TXC/CR

径向热传导设备(用于TSTCC)

配件 TSTCC
TXC/CR. Radial Heat Conduction Module for TSTCC: study of the principles of radial heat conduction and to allow the measurement of conductivity on a solid brass disc.Bench-top unit to study the principles of radial heat conduction, and to allow...
RADIATION HEAT TRANSFER MODULE FOR TSTCC - TXC/RC
Available
9.6.- 传播热量

TXC/RC

辐射传热设备(用于TSTCC)

配件 TSTCC
TXC/RC. Radiation Heat Transfer Module for TSTCC: study of the principles of heat transfer and exchange by radiation.Bench-top unit designed to demonstrate the laws of radiant heat transfer and radiant heat exchange.It basically consists of two...
EXTENDED SURFACE HEAT TRANSFER MODULE FOR TSTCC - TXC/SE
Available
9.6.- 传播热量

TXC/SE

扩展表面传热设备(用于TSTCC)

配件 TSTCC
TXC/SE. Extended Surface Heat Transfer Module for TSTCC: study of temperature profiles and heat transfer characteristics on an extended surface. It studies the effects of adding fins to a body to extend its surface to achieve a change in the...
UNSTEADY STATE HEAT TRANSFER MODULE FOR TSTCC - TXC/EI
Available
9.6.- 传播热量

TXC/EI

非稳态传热设备(用于TSTCC)

配件 TSTCC
TXC/EI. Unsteady State Heat Transfer Module for TSTCC: study of heat transfer in the non-stationary state Study of transient conduction with convection.Bench-top unit designed to allow practices and exercises to be performed in unsteady state heat...
THREE AXES HEAT TRANSFER MODULE FOR TSTCC - TXC/TE
Available
9.6.- 传播热量

TXC/TE

三轴传热设备(用于TSTCC)

配件 TSTCC
TXC/TE. Three Axes Heat Transfer Module for TSTCC: study of heat transfer by studying the direction in the three axes.Bench-top unit designed to carry out heat transfer experiments and exercises studying the direction in three axes.
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