Abstract: A refrigeration system for a carbon dioxide based refrigerant fluid, wherein the refrigeration system includes a refrigerant circuit, the refrigerant circuit including a compression device, a heat rejecting heat exchanger, an ejector, a receiver, an expansion device, and a heat absorbing heat exchanger; wherein the ejector includes a primary inlet, a secondary inlet and an outlet; wherein the receiver includes an inlet, a liquid outlet and a gas outlet; wherein the ejector primary inlet is arranged to receive fluid from an outlet of the heat rejecting heat exchanger, the ejector secondary inlet is arranged to receive fluid from an outlet of the heat absorbing heat exchanger, and the ejector outlet is arranged to direct flow to the receiver inlet; wherein a suction inlet of the compression device is arranged to receive refrigerant fluid from the gas outlet of the receiver.

Abstract: A refrigeration system for a carbon dioxide based refrigerant fluid, wherein the refrigeration system includes a refrigerant circuit, the refrigerant circuit including a compression device, a heat rejecting heat exchanger, an ejector, a receiver, an expansion device, and a heat absorbing heat exchanger; wherein the ejector includes a primary inlet, a secondary inlet and an outlet; wherein the receiver includes an inlet, a liquid outlet and a gas outlet; wherein the ejector primary inlet is arranged to receive fluid from an outlet of the heat rejecting heat exchanger, the ejector secondary inlet is arranged to receive fluid from an outlet of the heat absorbing heat exchanger, and the ejector outlet is arranged to direct flow to the receiver inlet; wherein a suction inlet of the compression device is arranged to receive refrigerant fluid from the gas outlet of the receiver.

Abstract: Cooling circuit section (2), intended for the circulation of a refrigerant, said cooling circuit section (2) comprising:—at least two compressor assemblies (30), fluidically connected in parallel, each compressor assembly (30) comprising:—a compressor (40) configured to receive a low-pressure refrigerant having a first pressure, and for increasing the pressure of the low-pressure refrigerant so as to produce a compressed refrigerant having a second pressure that is greater than the first pressure, the compressed refrigerant comprising oil,—an individual oil separator (42) comprising an inlet (58) fluidically connected to the compressor (40) so as to receive the compressed refrigerant from the compressor (40), each individual oil separator (42) being configured to separate a first fraction of oil from the compressed refrigerant, the cooling circuit section (2) further comprising a common oil separator (32).