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。

查看更多

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。

查看产品
相关资料

传播热量 设备

1.- 物理学 2.- 电子学 3.- 通讯 4.- 电力 5.- 能源 6.- 机电一体化与自动化 7.- 力学 8.- 流体力学 9.- 热力学与热工学 10.- 过程控制 11.- 化学工程 12.- 食品科技 13.- 环境 14.- 生物醫學工程 实验室配件 定制试验工厂
9.1.- 热力学的基本原理和基本概念 9.2.- 加热, 通风, 空调和热水 9.3.- 热泵 9.4.- 冷藏 9.5.- 热力液压管路系统 9.6.- 传播热量 9.7.- 换热器 9.8.- 热机 9.9.- 内部燃烧发动机 9.10.- 安装与维护
该分区没有可用的组
Showing 31-46 of 46 item(s)
12 24 36
COMPUTER CONTROLLED HEAT CONDUCTION UNIT - TCCC
  • TCCC
Available
9.6.- 传播热量

TCCC

Computer Controlled Heat Conduction Unit

The Computer Controlled Heat Conduction Unit, "TCCC", consists of two modules electrically heated.One of the modules is provided of a cylindrical metal bar for the realization of a series of experiments of linear heat conduction. While the ther...
查看单位
FREE AND FORCED CONVECTION HEAT TRANSFER EQUIPMENT - TCLFB
  • TCLFB
Available
9.6.- 传播热量

TCLFB

Free and Forced Convection Heat Transfer Equipment

The Free and Forced Convection Heat Transfer Unit, "TCLFB", allows to study the efficiency ofdifferent exchangers, analyzing the heat transmission coefficients of each exchanger exposedto different airflows.Fan placed in the upper part of the...
查看单位
COMPUTER CONTROLLED FLOW BOILING DEMONSTRATION UNIT - TFEC
  • TFEC
Available
11.1.3.- 沸腾

TFEC

Computer Controlled Flow Boiling Demonstration Unit

The Computer Controlled Flow Boiling Demonstration Unit, "TFEC", has as main component an experimental tube made of two glass concentric tubes. In these tubes two fluids flow crosscurrent: refrigerant, which flows by convection and in an...
查看单位
FLOW BOILING DEMONSTRATION UNIT - TFEB
  • TFEB
Available
11.1.3.- 沸腾

TFEB

Flow Boiling Demonstration Unit

The Flow Boiling Demonstration Unit, "TFEB", has as main component an experimental tube made of two glass concentric tubes. In thesetubes two fluids flow crosscurrent: refrigerant, which flows by convection and in an ascendant way through the...
查看单位
FLUIDIZATION AND FLUID BED HEAT TRANSFER UNIT - TTLFB
  • TTLFB
Available
11.1.1.- 流化

TTLFB

Fluidization and Fluid Bed Heat Transfer Unit

The Fluidization and Fluid Bed Heat Transfer Unit, "TTLFB", has been designed to provide visual and quantitative results related to the flow of air through a packed bed and a fluidized bed made of granular material. It provides clear experimental...
查看单位
LAMINAR/VISCOUS FLOW HEAT TRANSFER UNIT - TFLVB
  • TFLVB
Available
9.7.- 换热器

TFLVB

Laminar/Viscous Flow Heat Transfer Unit

The Laminar/Viscous Flow Heat Transfer Unit, "TFLVB", is a laboratory scale unit designed to study heat transfer between hot oil flowing inlaminar flow through an internal tube and cold water that flows through the annulus (ring-shaped area).Oil...
查看单位
COMPUTER CONTROLLED BOILING HEAT TRANSFER UNIT - TCEC
  • TCEC
Available
11.1.3.- 沸腾

TCEC

Computer Controlled Boiling Heat Transfer Unit

The Computer Controlled Boiling Heat Transfer Unit, "TCEC", consists of a heating element horizontally mounted inside a vertical glass chamber submerged in coolant. This heating element is connected to a cylindrical copper sleeve in contact with...
查看单位
BOILING HEAT TRANSFER UNIT - TCEB
  • TCEB
Available
11.1.3.- 沸腾

TCEB

Boiling Heat Transfer Unit

The Boiling Heat Transfer Unit, "TCEB", consists of a heating element horizontally mounted inside a vertical glass chamber submerged in coolant. This heating element is connected to a cylindrical copper sleeve in contact with the coolant. Attached...
查看单位
COMPUTER CONTROLLED STEAM TO WATER HEAT EXCHANGER - TIVAC
  • TIVAC
Available
9.7.- 换热器

TIVAC

蒸汽-水热交换器，电脑控制（PC）

The Computer Controlled Steam to Water Heat Exchanger, "TIVAC", is a unit designed to study condensation phenomena in shell and tube heat exchangers. It mainly consists of a steam chamber, which is a vertical cylinder made of resistant glass. The...
查看单位
COMPUTER CONTROLLED FILM AND DROPWISE CONDENSATION UNIT - TCPGC
  • TCPGC
Available
9.7.- 换热器

TCPGC

Computer Controlled Film and Dropwise Condensation Unit

The Computer Controlled Film and Dropwise Condensation Unit, "TCPGC", has been specially designed for students use and to provide visual results and quantitative results related to heat transfer during condensation. Self-contained unit, which has...
查看单位
FILM AND DROPWISE CONDENSATION UNIT - TCPGB
  • TCPGB
Available
9.7.- 换热器

TCPGB

Film and Dropwise Condensation Unit

The Film and Dropwise Condensation Unit, "TCPGB", has been specially designed for students use and to provide visual results and quantitative results related to heat transfer during condensation.Self-contained unit, which has its own steam...
查看单位
要求信息