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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相关资料

传播热量 设备

Showing 13-24 of 46 item(s)
CERAMIC HEAT TRANSFER MODULE FOR TSTCC - TXC/TC
Available
9.6.- 传播热量

TXC/TC

用于TSTCC的陶瓷传热设备

配件 TSTCC
TXC/TC. Ceramic Heat Transfer Unit for TSTCC: study of the heat transfer of different ceramic materials.Bench-top unit designed to study of the heat transfer of different ceramic materials.
INSULATING MATERIAL HEAT TRANSFER MODULE FOR TSTCC - TXC/TI
Available
9.6.- 传播热量

TXC/TI

用于TSTCC的绝缘材料传热设备

配件 TSTCC
TXC/TI. Insulating Material Heat Transfer Unit for TSTCC: study of the resistance to thermal conduction of different thermal insulation materials.Bench-top unit to study the thermal conduction resistance of different thermal insulating materials.
HEAT TRANSFER SERIES - TSTCB
  • TSTCB
Available
9.6.- 传播热量

TSTCB

热传递研究系列

The Heat Transfer Series, "TSTCB," 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 problems associated...
LINEAR HEAT CONDUCTION MODULE FOR TSTCB - TXC/CLB
Available
9.6.- 传播热量

TXC/CLB

线性热传导设备(用于TSTCB)

配件 TSTCB
TXC/CLB. Linear Heat Conduction Unit for TSTCB: 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 TSTCB - TXC/CRB
Available
9.6.- 传播热量

TXC/CRB

径向热传导设备(用于TSTCB)

配件 TSTCB
TXC/CRB. Radial Heat Conduction Unit for TSTCB: 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 the...
RADIATION HEAT TRANSFER MODULE FOR TSTCB - TXC/RCB
Available
9.6.- 传播热量

TXC/RCB

辐射传热设备(用于TSTCB)

配件 TSTCB
TXC/RCB. Radiation Heat Transfer Unit for TSTCB: 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 TSTCB - TXC/SEB
Available
9.6.- 传播热量

TXC/SEB

扩展表面传热设备(用于TSTCB)

配件 TSTCB
TXC/SEB. Extended Surface Heat Transfer Unit for TSTCB: 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 TSTCB - TXC/EIB
Available
9.6.- 传播热量

TXC/EIB

非稳态传热设备(用于TSTCB)

配件 TSTCB
TXC/EIB. Unsteady State Heat Transfer Unit for TSTCB: 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...
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