Volkswagen Golf Service & Repair Manual: Vapour pressure table for refrigerant R134a
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 column in the
container for a given temperature of the container. |
Since a characteristic vapour pressure table is known for
every refrigerant, one can determine what refrigerant is present
by measuring pressure and temperature. |
Note
Absolute pressure means that 0 bar corresponds to an
absolute vacuum. The normal ambient pressure (positive pressure)
corresponds to 1 bar absolute pressure. On most pressure gauges,
a reading of 0 bar corresponds to an absolute pressure of one
bar (which is confirmed by the existence of a -1 bar marking
beneath the 0 scale marking). |
|
|
|
Temperature in °C |
Pressure in
bar (positive pressure) R134a |
-45 |
-0.61 |
-40 |
-0.49 |
-35 |
-0.34 |
-30 |
-0.16 |
-25 |
0.06 |
-20 |
0.32 |
-15 |
0.63 |
-10 |
1.00 |
-5 |
1.43 |
0 |
1.92 |
5 |
2.49 |
10 |
3.13 |
15 |
3.90 |
20 |
4.70 |
25 |
5.63 |
30 |
6.70 |
35 |
7.83 |
40 |
9.10 |
45 |
10.54 |
50 |
12.11 |
55 |
13.83 |
60 |
15.72 |
65 |
17.79 |
70 |
20.05 |
75 |
22.52 |
80 |
25.21 |
85 |
28.14 |
90 |
31.34 |
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 al ...
Air conditioners in vehicles use the evaporation and
condensation process. The system contains a liquid with a low
boiling point, called the refrigerant.
...
Other materials:
Waxing and polishing the vehicle
First read and observe the introductory information
and safety warnings Waxing
Waxing protects the paintwork. You will need to re-wax the vehicle with a good
hard wax if water no longer clearly forms small drops
and runs off the paintwork when it is clean.
Even if a wax solution is used re ...
Removing and installing emblem with model designation, “R”
Special tools and workshop equipment
required
Torque wrench -V.A.G 1783-
Note
Only remove when radiator grille -3- is
removed.
Removing
...
Removing and installing inner door handle
The inner door handle is clipped into trim panel.
Note
Removal and installation are described for the trim
panel on driver side. Follow same instructions for the front
passenger side as appropriate.
...
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