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
...

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:

Pneumatic Brush Grinder Set -VAS6446
Definition: Pneumatic Brush Grinder Set -VAS6446- Product Description: The Pneumatic Brush Grinder Set -VAS6446- serves to prepare the surface. For example: removes underbody ...

Changing bulbs in the side turn signals
Fig. 188 Removing the side turn signal bulb Fig. 189 Side turn signal: changing the bulb First read and observe the introductory information and safety warnings Depending on the vehicle, the side turn signal may be located in the front wing or in the exterior mirror . Please contact a ...

Cracking
Cracking is the term for shallow cracks in the sidewall of the tire. They run starting from the bulge in the direction of the tire shoulder. See Illustration for the mentioned components. Refer to → Fig. „“Components ...

© 2016-2026 Copyright www.vwpolo.net