Volkswagen Touran Service 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) |
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| Vapor pressure curve of refrigerant R134a |
| D - |
Vapor pressure curve of refrigerant R134a |
| 1 - |
Pressure acting on liquid in bar (psi) |
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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:
Volkswagen Touran Owners Manual. Tyre monitor indicator lamp
First read and observe the introductory information
and safety warnings
Tyre monitor display
Symbol is lit up
Possible cause
Correction
It is lit up and an audible warning is given:
the tyre pressure of one ...
Volkswagen Touran Owners Manual. Petrol
First read and observe the introductory information
and safety warnings Petrol types
Vehicles with a petrol engine must be run on unleaded petrol in compliance with
the European standard EN 228 .
Petrol types are categorised according to their octane number, e.g. 91, 95, 98
or 99 RON ( ...
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Physical Principles
Refrigerant R134a Vapor Pressure Table