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Heat always flows from a warmer substance to a colder substance > < Principles of the air-conditioning technology

Fabia Mk1

Physical principles
Physical principles
   
The four known aggregate phases of water also exist for the refrigerants of the air conditioning system.
1 - gaseous (not visible)
2 - vaporous
3 - liquid
4 - solid
  N87-0531
If water is heated in a container (heat absorption) rising water vapour is visible. If the vapour is heated even more through heat absorption, the visible vapour becomes invisible gas. The procedure is reversible. If the heat content is extracted from the gaseous water, this results first of all in vapour, from this the vapour turns into water and then into ice.
A - Heat absorption
B - Heat dissipation
  N87-0529

Heat always flows from a warmer substance to a colder substance > < Principles of the air-conditioning technology