Refrigeration – Processes – Separating or preventing formation of undesirables
Patent
1993-03-15
1994-10-18
Sollecito, John M.
Refrigeration
Processes
Separating or preventing formation of undesirables
62195, 62475, F25B 4700
Patent
active
053556852
ABSTRACT:
The presence of an undesirable quantity of noncondensible gases in a refrigeration unit is inferred as a function of both the vapor pressure and temperature at a selected point in the refrigeration unit where the noncondensible gases tend to gather. Purging of these noncondensible gases, which contaminate the refrigerant, is responsive to a comparison in a programmable controller of the actual vapor pressure measured at the selected point, and the known pressure of uncontaminated refrigerant at the temperature existing at the selected point. On detecting a difference between these pressures that is greater than a desired value, the controller calculates a control output signal needed to purge a volume of contaminated vapor from the unit that is effective for reducing the difference between the measured pressure of contaminated refrigerant and the known pressure of uncontaminated refrigerant to a desired value.
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Calame Carl
Stie Kenneth E.
Bogatie George E.
Phillips Petroleum Company
Sollecito John M.
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