VW Polo manuals

Volkswagen Polo Service & Repair Manual: Physical Principles

The four known states of water also apply to air conditioning system refrigerants.
1 -  gaseous (invisible)
2 -  vapor
3 -  fluid
4 -  solid
 

Physical Principles

When water is heated in a vessel (heat absorption), water vapor can be seen to rise. If the vapor is further heated through heat absorption, the visible vapor turns into invisible gas. The process is reversible. The warmth is extracted from gaseous water, vapor forms first, then water and then ice.
A -  Heat absorption
B -  Heat emission
 

Physical Principles

Heat Transfer

Every substance consists of a mass of moving molecules. The fast moving molecules of a warmer substance give off some of their energy to the cooler and thus slower molecules. As a result, the molecular motion of the warmer substance slows down and that of the colder substance is accelerated. This process continues until the molecules of both substances are moving at the same speed. They are then at the same temperature and no further heat exchange takes place.
   
A/C Technology Basic Principles
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Pressure and Boiling Point
The boiling point given in tables for a liquid is always referenced to an atmospheric pressure of 1 bar (14.5 psi). If the pressure acting on a fluid changes, its boi ...

Other materials:

EU Tire Label, Categories
Rolling Resistance. Refer to → Anchor Wet Grip. Refer to → Anchor Noise Emission. Refer to → Anchor     Rolling Resistance ...

Battery Tester Charger Kit -GRX3000VAS- General Description
Only Volkswagen approved chargers may be used to charge batteries in Volkswagen vehicles. Only the Battery Tester Charger Kit -GRX3000VAS- charger is used in the USA and Canada. The Battery Tester Charger Kit -GRX3000VAS- battery charger ...

Oxygen Sensor Unit Protective Pipes
  Note In addition to using the part number, the protective pipe can also be used for identification. Version D1, 6 openings, 3.5 mm each     Only used with the 4-pin oxygen sen ...

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