Abstract: A refrigeration system is disclosed. The refrigeration system includes a refrigeration circuit including a compressor, a condenser, an expansion valve, and an evaporator fluidly connected. A purge circuit is fluidly connected to the condenser. The purge circuit is configured to receive a purge stream from the condenser. The purge stream is a mixture including a refrigerant and non-condensables. The purge circuit includes a plurality of heat exchangers for condensing the purge stream such that the non-condensables and the refrigerant in the purge stream are separated.

Abstract: Purge systems for heating, ventilation, air conditioning, and refrigeration (HVACR) circuits in chillers can use adsorbent and/or membranes to separate refrigerant from non-condensable gases, allowing the non-condensables to be exhausted while the working fluid can be recovered and returned to the HVACR circuit. The purge systems can include one or more separation chambers including either an adsorbent material or a selectively permeable membrane. The selectively permeable membrane can be solubility-based for its selectivity. Optionally, a pusher pump can be upstream of the separation chambers to pressurize the purge gas through the purge system, including in the separation chamber. The purge system can be controlled using a model correlating pressure differentials in the purge system with purge gas conditions such as non-condensable and working fluid concentrations.

Abstract: A refrigeration system is disclosed. The refrigeration system includes a refrigeration circuit including a compressor, a condenser, an expansion valve, and an evaporator fluidly connected. A purge circuit is fluidly connected to the condenser. The purge circuit is configured to receive a purge stream from the condenser. The purge stream is a mixture including a refrigerant and non-condensables. The purge circuit includes a plurality of heat exchangers for condensing the purge stream such that the non-condensables and the refrigerant in the purge stream are separated.