Volkswagen Golf Service & Repair Manual: Physical basics

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / General notes on air conditioning systems / Basics of air conditioning / Physical basics

The four known physical states of water also apply to air conditioning refrigerants.

1 -	Gas (invisible)

2 -

Vapour

3 -

Liquid

4 -

Solid

Physical basics

When water is heated in a container (heat absorption), the rising water vapour is visible. If the vapour is heated by further heat absorption, the visible vapour becomes invisible gas. This process is reversible. If heat is extracted from gaseous water, it changes first to vapour, then to water and finally to ice.

A -	Heat absorption

B -	Heat dissipation

Physical basics

Basics of air conditioning

...

Heat always flows from warmer to colder material

Every material consists of a mass of moving molecules. The fast moving molecules of a warmer material loose part of their energy to slower molecules possessing less heat. This slows down the molec ...

Other materials:

Removing and installing electronics box (E-box)
Removing – With ignition switched off, disconnect earth cable from battery → Chapter. Diesel engine – Remove engine control unit and lay to one side with ...

2-pack HS Performance clear coat
Designation: 2-pack HS Performance clear coat -LZK 769 K06 A5- Issued 08.2012 Product description 2-pack HS Performance clear coat is a high-gloss, VOC compliant, high-solid ...

Removing and installing drive shaft, left drive shaft, constant velocity joints VL100 and VL107, e-Golf
Special tools and workshop equipment required Torque wrench -V.A.G 1332- Press tool -T10520- ...