Volkswagen Golf Service & Repair Manual: Pressure and boiling point
| The boiling points given in the table below are always based
on an atmospheric pressure of 1 bar. If the pressure on a liquid
is changed, its boiling point changes also. |
| It is well known that, for example, the lower the pressure,
the lower the temperature at which water boils. |
| The vapour pressure curves for water and for refrigerant
R134a show that at constant pressure and falling temperature the
vapour becomes liquid (in the condenser), and that when pressure
drops, the refrigerant changes from liquid into the vapour state
(evaporator). |
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| Vapour pressure curve for water |
| C - |
Vapour pressure curve for water |
| 1 - |
Pressure on the liquid in bar (absolute) |
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| Vapour pressure curve for refrigerant R134a |
| D - |
Vapour pressure curve for refrigerant R134a |
| 1 - |
Pressure on the liquid in bar (absolute) |
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Every material consists of a mass of moving molecules. The fast moving
molecules of a warmer material loose part of their energy to slower molecules
possessing less heat. This slows down the molec ...
The vapour pressure table for each refrigerant is published
in the literature for refrigeration engineers. This table shows
the vapour pressure exerted on the liquid ...
Other materials:
Removing and installing brake pads or linings
Special tools and workshop equipment required
Vehicle diagnosis, testing and information system -VAS 5051-
Tool set for brake bleeding -VAS 6564-
Insert tool with ratchet -VAS 6784-
Bit attachment (7 mm) -T10503-
...
O-ring
These O-rings seal the joints between the individual
components of the refrigerant circuit.
Use only seals that are resistant to refrigerant R134a and
its associated refrigerant oils. This is assured by using
genuine replacement parts.
...
Refrigerant pressure and temperature sender -G395
WARNING
Danger of freezing injuries.
If refrigerant circuit has not been evacuated,
refrigerant will escape.
The refrigerant must be extracted before removi ...
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Heat always flows from warmer to colder material
Vapour pressure table for refrigerant R134a