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). |
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|
|
| Vapor pressure curve of water |
| C - |
Vapor pressure curve of water |
| 1 - |
Pressure acting on liquid in bar (psi) |
| 2 - |
Temperature in °C (°F) |
|
|
|
| Vapor pressure curve of refrigerant R134a |
| D - |
Vapor pressure curve of refrigerant R134a |
| 1 - |
Pressure acting on liquid in bar (psi) |
| 2 - |
Temperature in °C (°F) |
|
|
|
The four known states of water also apply to air
conditioning system refrigerants.
1 -
gaseous (invisible)
2&n ...
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:
Contact Housings and Connectors, Repair Information
Note
Observe general notes for repairs on the vehicle electrical
system. Refer to
→ Chapter „Vehicle Electrical System, General Repair
Information“.
Allocation of crimp contacts with correct fit ...
Diesel particulate filter
First read and observe the introductory information
and safety warningsThe diesel particulate filter filters out soot particles
in the exhaust gas. The soot particles gather in the filter and are burnt under
high temperatures periodically (regeneration). Heat produced can
warm the engine.
...
Vibration, Vibration Control System
Expanded functions can be performed using Hunter RFT33VAG
Road Force Touch™ Wheel Balancer -VAS6230B4- in addition to the
previously known balancers.
A special characteristic of this system is testing the
radial force of wheel/tire dur ...
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Physical Principles
Refrigerant R134a Vapor Pressure Table