A packaged, pumped liquid, evaporative-condensing recirculating ammonia refrigeration system with charges of 10 lbs or less of refrigerant per ton of refrigeration capacity. The compressor and related components are situated inside the plenum of a standard evaporative condenser unit, and the evaporator is close coupled to the evaporative condenser. Single or dual phase cyclonic separators may also be housed in the plenum of the evaporative condenser.

An accumulator is an accumulator disposed between an evaporator and a refrigerant suction port of a compressor in a refrigerant circuit of a refrigeration cycle apparatus. The accumulator includes: a container; an inflow pipe having a first opening end disposed in the container, the inflow pipe introducing, into the container, refrigerant flowing out from the evaporator; and an outflow pipe having a second opening end disposed in the container, the outflow pipe supplying refrigerant in the container to the compressor. The container includes an inner circumferential surface that extends along a vertical direction and a circumferential direction, and a concave surface that is concave with respect to the inner circumferential surface and extends along the circumferential direction. A part of the concave surface in the circumferential direction is disposed to face the first opening end.

A fluid handling system includes a pressure exchanger (PX) configured to receive a first fluid at a first pressure and a second fluid at a second pressure and exchange pressure between the first fluid and the second fluid. The system further includes a condenser configured to provide corresponding thermal energy from the first fluid to a corresponding environment. The system further includes a receiver to receive the first fluid output by the PX. The receiver forms a chamber to separate the first fluid into a first gas and a first liquid. The system further includes a heat exchanger configured to receive the second fluid from the second outlet of the PX and provide the second fluid to the second inlet of the PX.

If a first condition that an intermediate pressure corresponding to a pressure of an intermediate flow path is greater than a predetermined value is satisfied in an operation in which first, second, and third compressors are operated, the control unit executes a first action of increasing the number of revolutions of the third compressor.

A cooling system implements various processes to improve efficiency in high ambient temperatures. First, the system can flood one or more low side heat exchangers in the system. Second, the system can direct a portion of vapor refrigerant from a low side heat exchanger to a flash tank rather than to a compressor. Third, the system can transfer heat from refrigerant at a compressor suction to refrigerant at the discharge of a high side heat exchanger.

The application relates to a cooling system, the cooling system having: an evaporator, a first compressor, a second compressor, a cooling component, an expansion device and a line system that connects the evaporator, the first compressor, the second compressor, the cooling component and the expansion device to one another. The cooling system includes a refrigerant, wherein the refrigerant comprises carbon dioxide. The first compressor and the second compressor are arranged in series with one another. The application also relates to a corresponding laboratory instrument.

A thermal management system includes a receiver configured to store a refrigerant fluid; a refrigeration system having a refrigerant fluid path that includes the receiver, and at least one evaporator disposed in the refrigerant fluid path. The refrigeration system is configured to receive the refrigerant fluid from the receiver through the refrigerant fluid path. The at least one evaporator is configured to receive the refrigerant fluid and to extract heat from at least one heat load having a specified thermal inertia that is in at least one of thermal conductive or convective contact with the at least one evaporator.

A heat pump is provided with a compressor; an oil separator provided on a discharge path of the compressor; an accumulator connected to the compressor via a suction path; and a bypass circuit configured to supply a gas refrigerant separated by the oil separator. The bypass circuit is connected to the suction path.

A heat pump system comprises a compressor, a first heat exchanger, a second heat exchanger, a mode switching valve, a throttling element and a reservoir, wherein the throttling element is arranged on a flow path between the first heat exchanger and the second heat exchanger; and which further comprises a mode switching flow path in which a first flow path and a second flow path are arranged, the reservoir is arranged on the second flow path and each flow path is controllably opened or closed to realize different functional modes.

A gas-liquid separation device for a vehicle according to an embodiment of the present disclosure includes: a housing with an upper surface that is opened and a lower surface that is closed; a cover mounted on the opened upper surface to close and seal the interior of the housing, and including an outlet and an inlet, and a mount hole; an exhaust pipe mounted on the cover; a guide pipe with an upper surface that is opened so that the exhaust pipe is inserted inside, and forms a gas refrigerant flow space between the exterior circumference and the interior circumference of the exhaust pipe; a mount cap mounted inside the closed lower end of the housing; a refrigerant guider to prevent the liquid refrigerant of the refrigerant inflowed into the inlet from flowing into the gas refrigerant flow space, and fixed to the exhaust pipe; and a receiver dryer.