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:

Warning lamp
First read and observe the introductory information and safety warnings Lit up Possible cause Solution The tailgate is open or not properly closed. Do not drive on! Open the tailgate and close it again. Several warning and ...

High Pressure Sensor -G65
  Note For switching pressures, removing and installing switches and switch arrangement and version, see vehicle-specific refrigerant circuit. Refer to → Rep. Gr.87.     ...

Plastic Primer
Adhesion Promoter (Glazing) Definition: Adhesion Promoter -ALO 822 000 10- (glazing) Edition 06/2011 Product Description The glazing adhesion promoter is a universal single- ...

© 2016-2025 Copyright www.vwpolo.net