9.6.- HEAT TRANSFER

The laws of thermodynamics deal with the energy transfer and interaction between heat and work, but only in equilibrium systems. Consequently, they allow us to determine the initial and final states, but they cannot be used to predict and quantify the intermediate process. Heat transfer provides methods to determine these processes.

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There are three heat transfer modes:

  • Conduction: occurs in a solid medium by the effect of a temperature gradient that causes the transfer of heat from the highest to lowest temperature zone. The heat transmitted by conduction per unit of time is proportional to the temperature gradient multiplied by the area A.
  • Convection: when a fluid comes into contact with a solid surface, an exchange between the particles of the fluid and the solid occurs. There are two convection processes:
  • Free convection: the driving force comes from the difference in density between particles of the fluid. The temperature and density of the particles in contact with the solid change, causing an upward flow.
  • Forced convection: the driving force comes from the outside and moves a fluid on the surface.
  • Radiation: in the absence of a medium, there is a net heat transfer by radiation between two surfaces at different temperatures due to changes in the electronic configurations of the atoms or molecules that form those surfaces. The heat emitted by radiation is described by the Stefan-Boltzmann law.

The heat transfer cannot be prevented, but the transfer rate can be modified. The heat transfer study is important to determine materials or configurations that optimize the heat exchange rate based on some parameters.

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HEAT TRANSFER EQUIPMENT

1.- PHYSICS 2.- ELECTRONICS 3.- COMMUNICATIONS 4.- ELECTRICITY 5.- ENERGY 6.- MECHATRONICS & AUTOMATION 7.- MECHANICS 8.- FLUID MECHANICS 9.- THERMODYNAMICS & THERMOTECHNICS 10.- PROCESS CONTROL 11.- CHEMICAL ENGINEERING 12.- FOOD & WATER TECHNOLOGIES 13.- ENVIRONMENT 14.- BIOMEDICAL ENGINEERING LABORATORY ACCESSORIES CUSTOMIZED PILOT PLANTS
9.1.- FUNDAMENTALS AND BASIC CONCEPTS OF THERMODYNAMICS 9.2.- HEATING, VENTILATION, AIR CONDITIONING AND HOT WATER 9.3.- HEAT PUMPS 9.4.- REFRIGERATION 9.5.- THERMAL HYDRAULIC PIPING SYSTEM 9.6.- HEAT TRANSFER 9.7.- HEAT EXCHANGERS 9.8.- THERMAL MACHINES 9.9.- INTERNAL COMBUSTION ENGINES 9.10.- INSTALLATIONS AND MAINTENANCE
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FREE AND FORCED CONVECTION HEAT TRANSFER UNIT FOR TSTCB - TXC/FFB
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9.6.- HEAT TRANSFER

TXC/FFB

Free and Forced Convection Heat Transfer Unit for TSTCB

Accessory of TSTCB
TXC/FFB. Free and Forced Convection Heat Transfer Unit for TSTCB: study of the performance of different exchangers, analysing the heat transmission coefficients of each of the exchangers exposed to different air flows.This unit allows to study the...
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THREE-AXIS HEAT TRANSFER UNIT FOR TSTCB - TXC/TEB
Available
9.6.- HEAT TRANSFER

TXC/TEB

Three-Axis Heat Transfer Unit for TSTCB

Accessory of TSTCB
TXC/TEB. Three Axes Heat Transfer Unit for TSTCB: 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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METAL TO METAL HEAT TRANSFER UNIT FOR TSTCB - TXC/MMB
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9.6.- HEAT TRANSFER

TXC/MMB

Metal to Metal Heat Transfer Unit for TSTCB

Accessory of TSTCB
TXC/MMB. Metal to Metal Heat Transfer Unit for TSTCB: study of the heat transfer of different metallic materials placed in series.Bench-top unit designed to study of the heat transfer of different metallic materials situated in series.
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CERAMIC HEAT TRANSFER UNIT FOR TSTCB - TXC/TCB
Available
9.6.- HEAT TRANSFER

TXC/TCB

Ceramic Heat Transfer Unit for TSTCB

Accessory of TSTCB
TXC/TCB. Ceramic Heat Transfer Unit for TSTCB: study of the heat transfer of different ceramic materials.Bench-top unit designed to study of the heat transfer of different ceramic materials.
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INSULATING MATERIAL HEAT TRANSFER UNIT FOR TSTCB - TXC/TIB
Available
9.6.- HEAT TRANSFER

TXC/TIB

Insulating Material Heat Transfer Unit for TSTCB

Accessory of TSTCB
TXC/TIB. Insulating Material Heat Transfer Unit for TSTCB: 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.
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COMPUTER CONTROLLED HEAT CONDUCTION UNIT - TCCC
  • TCCC
Available
9.6.- HEAT TRANSFER

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...
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FREE AND FORCED CONVECTION HEAT TRANSFER EQUIPMENT - TCLFB
  • TCLFB
Available
9.6.- HEAT TRANSFER

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...
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COMPUTER CONTROLLED FLOW BOILING DEMONSTRATION UNIT - TFEC
  • TFEC
Available
11.1.3.- BOILING

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...
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