The three Types of Heat Transfer: Conduction, Convection and Radiation


The three types of heat transfer


Heat is transfered via solid material (conduction), liquids and gases (convection), and electromagnetical waves (radiation). Heat is usually transfered in a combination of these three types and seldomly occurs on its own. For example, the thermal environment of a building is influenced by heat fluxes through the ground (conduction), and the building envelope (mostly convection and radiation).


Convection
Convection is heat flux through liquids and gases. gSKIN®  Heat Flux Sensors can measure convective heat flux (see picture on the left). Examples of convective heat flux are:

  • Feeling much colder when it is windy.
  • Feeling much colder in water of 25°C than in air of 25°C.
  • Sensing principle in heat flux based mass flow sensors. Learn more

 

Conduction
Conduction is heat flux through solid materials. gSKIN®  Heat Flux Sensors can measure conductive heat flux (see picture on the left). Examples of conductive heat flux are:

  • Touching a hot cup of coffee
  • Thermal influences in precision instruments. Learn more
  • Measurement of heat output from chemical reactors. Learn more

 

Radiation
Radiation is heat flux through electromagnetic waves. gSKIN®  Heat Flux Sensors can measure radiative heat flux (see picture on the left). Examples of radiative heat flux are:

  • Feeling hot when standing close to fire.
  • Measurement of solar power. Learn more.