An ejector refrigeration cycle has a compressor, a radiator, an ejector, a swirl flow generator, an evaporator, and an oil separator. The compressor compresses refrigerant, mixed with refrigerant oil compatible with a liquid-phase refrigerant, and discharges the high-pressure refrigerant. The ejector has a nozzle and a body having a refrigerant suction port and a pressure increasing part. The swirl flow generator is configured to cause a decompression boiling in the refrigerant by causing the refrigerant to swirl about a center axis of the nozzle. The oil separator separates the refrigerant oil from the high-pressure refrigerant compressed by the compressor and guides the refrigerant oil to flow to a suction side of the compressor. The oil separator decreases a concentration of the refrigerant oil in the refrigerant, which is to flow into the swirl flow generator, so as to promote the decompression boiling of the refrigerant in the swirl flow generator.

In an ejector refrigeration cycle, an inlet of a nozzle portion of an ejector is connected to a refrigerant outlet side of a high-stage side evaporator, a refrigerant suction port of the ejector is connected to a refrigerant outlet side of a low-stage side evaporator, and an internal heat exchanger is provided for exchanging heat between a high-pressure refrigerant flowing into a low-stage side throttle device for decompressing the refrigerant flowing into the low-stage side evaporator, and a low-stage side low-pressure refrigerant flowing out of the low-stage side evaporator. Because a difference in enthalpy between the inlet and outlet of the low-stage side evaporator can be enlarged, the cooling capacities exhibited by the respective evaporators can be adjusted to be closer to each other even if the flow-rate ratio Ge/Gn of the suction refrigerant flow rate Ge to the injection refrigerant flow rate Gn is set to a relatively small value so as to make it possible to improve the COP of the cycle.

A thermal management system includes a closed dynamic cooling circuit, and a closed first steady-state cooling circuit. Each circuit has its own compressor, heat rejection exchanger, and expansion device. A thermal energy storage (TES) system is configured to receive a dynamic load and thermally couple the dynamic cooling circuit and the first steady-state cooling circuit. The dynamic cooling circuit is configured to cool the TES to fully absorb thermal energy received by the TES when a dynamic thermal load is ON, and the steady-state cooling circuit is configured to cool the TES when the dynamic thermal load is OFF.

A system (20; 300) comprises: a compressor (22) having a suction port (40) and a discharge port (42); an ejector (32) having a motive flow inlet (50), a suction flow inlet (52), and an outlet (54); a separator (34) having an inlet (72), a vapor outlet (74), and a liquid outlet (76); a first heat exchanger (24); an expansion device (28); and a second heat exchanger (26; 302). Conduits and valves are positioned to provide alternative operation in: a cooling mode; a first heating mode; and a second heating mode. In the cooling mode and second heating mode, a needle (60) of the ejector is closed.

Disclosed herein are a refrigeration cycle device and three-way flow rate control valve. In a refrigeration cycle device including a compressor, first and second coolers configured to cool first and second storage compartments at least, respectively, and a mixer configured to mix refrigerants that have passed through the first and second coolers, a refrigerant flow path is switched so that refrigerants of first and second flow rates are circulated to the first and second coolers, respectively, while the first and second storage compartments are being cooled, and a refrigerant flow path is switched so that a refrigerant of a specific flow rate, which is smaller than a first flow rate but is not zero, is circulated to the first cooler after cooling of the first storage compartment is completed.

A thermally driven heat pump includes a low temperature evaporator for evaporating cooling fluid to remove heat A first heat exchanger located at an outlet of a converging/diverging chamber of a first ejector receives a flow of primary fluid vapor and cooling fluid vapor ejected from the first ejector for condensing a portion of the cooling fluid vapor An absorber located in the first heat exchanger absorbs cooling fluid vapor into an absorbing fluid to reduce the pressure in the first heat exchanger A second heat exchanger located at an outlet of a converging/diverging chamber of a second ejector receives primary fluid vapor and cooling fluid vapor ejected from the second ejector for condensing the cooling fluid vapor and the primary fluid vapor A separator in communication with the second ejector, the low temperature evaporator and the primary fluid evaporator separates the primary fluid from the cooling fluid.

Systems and methods for regenerative ejector-based cooling cycles that utilize an ejector as the motivating force in a cooling loop to regeneratively sub-cool a refrigerant in a single-stage cooling cycle.

A pre-cooling circuit for supplying helium refrigeration to at least one consumer to be cooled, comprising a feed line and a return line which are connected to one another via a refrigerating device, said refrigerating device being designed to exchange heat with the at least one consumer to be cooled; a helium cooling system, which is designed to dissipate heat to the environment, to compress helium flowing back and to feed the compressed helium into the feed line; a first and a second cooling bath container, the feed line running through a first heat exchanger located in a bottom region of the first cooling bath container and subsequently in the direction of the refrigerating device through a second heat exchanger located in a bottom region of the second cooling bath container.

Methods and systems for a MTRS with an ejector system are provided. The system can include a refrigeration circuit that has a compressor, a first heat exchanger downstream of the compressor, first and second heat exchange units downstream of the first heat exchanger, and an ejector system downstream of the first and second heat exchange units and upstream of the compressor. The first heat exchange unit provides independent climate control to a first zone of the transport unit. The second heat exchange unit provides independent climate control to a second zone of the transport unit. The ejector system mixes refrigerant exiting the first heat exchange unit with refrigerant exiting the second heat exchange unit, increases the pressure of the mixed refrigerant, and directs the mixed refrigerant to the compressor.

Liquid separator (2), designed as a U-shaped pipe (5) and arranged essentially horizontally, for a plate heat exchanger evaporator (1) system for separation of liquid droplets from vapor transported from the evaporator to the separator.