VW Polo manuals

Volkswagen Polo Service & Repair Manual: 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 boiling point also changes.
For example, water boils at a lower temperature the lower the pressure.
The vapor pressure curves for water and refrigerant R134a show that, at constant pressure, reducing the temperature changes vapor to liquid (in the condenser) or that reducing the pressure causes the refrigerant to change from liquid to vapor (evaporator).
Vapor pressure curve of water
A -  fluid
B -  Gaseous
C -  Vapor pressure curve of water
1 -  Pressure acting on liquid in bar (psi)
2 -  Temperature in °C (°F)

Pressure and Boiling Point

Vapor pressure curve of refrigerant R134a
A -  Fluid
B -  Gaseous
D -  Vapor pressure curve of refrigerant R134a
1 -  Pressure acting on liquid in bar (psi)
2 -  Temperature in °C (°F)

Pressure and Boiling Point

Physical Principles
The four known states of water also apply to air conditioning system refrigerants. 1 -  gaseous (invisible) 2&n ...

Refrigerant R134a Vapor Pressure Table
The vapor pressure table for every refrigerant is published in literature for refrigeration system engineers. This table makes it possible to determine the vapor pres ...

Other materials:

Antenna Wires, Repairing
Aerial Cable Repair Set -VAS6720 Special tools and workshop equipment required Repair Set, Aerial Cable -VAS6720- Checking the Antenna Wire. Refer to Replacing the Tool Head. Refer to ...

This chapter contains information on the following subjects:  → Fuses in the vehicle  → Changing a blown fuse At the time of print we are unable to provide an up-to-date overview of the locations of the fuses for the electrical consumers. This is because the vehicle is under co ...

Accessories and parts
First read and observe the introductory information and safety warningsVolkswagen recommends that you seek advice from a Volkswagen dealership before purchasing accessories, spare parts or service fluids. For example, if the vehicle is to be retrofitted with accessories or if parts have to be ...

© 2016-2022 Copyright www.vwpolo.net