View Full Version : Saturation temperature
Volnei
24-10-2009, 01:04 PM
There is an industrial refrigeration installation with ammonia in a place where the altitude is 1000m above the sea level. The manometric pressure in the liquid separator 0,19MPa.
So all Refrigerants Thermophysical Properties Tables are in absolute pressures what´s the ammonia saturation temperature in this case?
Regards.
Volnei
RANGER1
24-10-2009, 09:26 PM
Not sure why you need to convert as once system has ammonia in it and sealed up atmospheric pressure won't effect it in anyway ?
If you have absolute reading subtract 0.1 mpa for gauge reading .
ie atmospheric pressure at sea level + 101 kpa or 14.7 psi for absolute reading .
Maybe you can also adjust readout to gauge if you have a frick or similar control panel .
sterl
24-10-2009, 10:04 PM
Unless that's a differential gauge: Your atmospheric pressure will have nothing to do with the reading, or with the Sat Temp corresponding (As ranger staates). The answer i s Minus 20 C. is corresponding Sat Temp.
Magoo
25-10-2009, 01:16 AM
Has nothing to do with altitude, the reference relates to absolute conditions as a standard.
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