Method and apparatus for removal of gas from refrigeration syste

Details Method and apparatus for removal of gas from refrigeration syste Method and apparatus for removal of gas from refrigeration syste

1990-07-12

1991-11-05

Makay, Albert J.

Refrigeration

Processes

Separating or preventing formation of undesirables

62475, F25B 4700

Patent

active

050622730

ABSTRACT:
An improved process for separating and removing non-condensible gaseous contaminants (e.g., nitrogen, oxygen and the like) from a conventional halocarbon vapor compression refrigeration system by withdrawing a vapor stream above liquified refrigerant exiting the condenser on the high pressure side of the expansion valve and then processing this vapor by use of a second compression step, followed by condensation into a receiver. The liquid halocarbon from the receiver is returned to the evaporator while the vapor phase is sent to a semipermeable membrane separation unit. The halocarbon enriched effluent from the semipermeable membrane unit is recycled to the inlet side of the second compressor while the non-condensible contaminant enriched stream is vented from the refrigeration system. Such a high pressure purge loop is useful in selectively removing non-condensible gaseous with minimum halocarbon refrigerant loss.

REFERENCES:
patent: 4304102 (1981-12-01), Gray
patent: 4316364 (1982-04-01), Spauschus
patent: 4417451 (1983-11-01), Spauschus
patent: 4476688 (1984-10-01), Goddard
patent: 4553983 (1985-11-01), Baker
"Recovery of Freon Gases with Silicon Rubber Membranes", Daryl L. Roberts et al., Ind. Eng. Chem. Process Des. Dev. (1986) pp. 971-973.
"Membrane Research in Energy and Solvent Recovery from Industrial Effluent Streams", R. W. Baker et al., DOE/ID/12379-T1 (1982-1983) pp. 17-24.

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