Insulation for a better tomorrow

Thermal insulation

 

Thermal Insulation means the decrease of thermal transmission. Thermal transmission is the transfer of heat from a warmer body to a colder body. Thermal transmission may in principle take place in the following ways:

  • Conduction – transfer of heat through solid/liquid material by direct bonding between its particles. This process tends to equal its temperature. Thermal transmission through fixed opaque material only takes place by conduction.
  • Convection – the transfer of heat through moving fluids (liquid or gas). It takes place by means of particles displacement between regions with different temperatures.

    Examples: the heating in a pot of water over a flame, inside a room the heat air rises, cools, and falls.

  • Radiation – transfer of heat by means of electromagnetic waves or moving subatomic particles.

    Examples: The sun, as it transfers the heat  through electromagnetic waves; also, the microwaves ovens use radiation.

    Common insulation materials rely on the principle of trapping air to reduce convective and conductive heat transfer.  These three data give an overview of the applicability of the insulation concerning thermal insulation.

    Thermal conductivity (l) is the ability of a material to conduct heat.

    Thermal resistance (R-value) is the ability of a product to resist the flow of heat through it. It is related to thickness and lambda value.

    Thermal transmittance (U-value) is the heat quantity that goes through a building component (i.e. an external wall) due to the difference in temperatures at either side of it. It is related to R-value.