Embodiments of the present disclosure are directed toward purge units of vapor compression systems, and methods of control thereof, that improve efficiency by selectively activating and deactivating the purge unit in response to one or more conditions to, for example, enable refrigerant-to-air ratios within the purge unit within certain industry standards while still minimizing the durations of the purge cycles. For example, in certain embodiments, these conditions may include conditions within the chiller condenser, time since last purge activation, time since last venting of non-condensables, and combinations thereof. By reducing an amount of time that the purge unit would be active without removing a substantial amount non-condensables from the vapor compression system, present embodiments reduce the power consumption of the purge unit, as well as the vapor compression system as a whole, while still being responsive to prevent or mitigate a loss of efficiency due to a substantial accumulation of non-condensables in the condenser of the vapor compression system.

Thermal management systems include an open-circuit refrigeration system featuring a receiver configurable to store a refrigerant fluid, an evaporator configurable to extract heat from a heat load when the heat load contacts the evaporator, and an exhaust line, where the receiver, the evaporator, and the exhaust line are connected to form a refrigerant fluid flow path, and a first control device configurable to control a vapor quality of the refrigerant fluid at an outlet of the evaporator along the refrigerant fluid flow path.

An air conditioner may include a compressor that compresses refrigerant; a condenser that condenses the refrigerant; at least one expansion valve that expands the refrigerant; a gas-liquid separator that separates and discharges the refrigerant into gas refrigerant and liquid refrigerant; an evaporator that evaporates the liquid refrigerant discharged from the gas-liquid separator; a refrigerant inflow pipe that connects the expansion valve and the gas-liquid separator; a bypass pipe that connects the gas-liquid separator and the compressor; and a refrigerant discharge pipe that connects the gas-liquid separator and the evaporator. The gas-liquid separator may include a housing in which a portion of the refrigerant inflow pipe, the bypass pipe, and the refrigerant discharge pipe may be disposed, and first and second partition walls disposed in the housing.

A centrifugal coolant gas separator (CCGS) for a cooling system is provided. In one example configuration, the CCGS includes a main body defining a cyclone separator chamber therein configured to separate a flow of coolant into gas and liquid coolant, a liquid outlet formed in the main body and configured to receive the separated liquid coolant from the cyclone separator chamber, and a gas outlet formed in the main body and configured to receive the separated gas from the cyclone separator chamber. A first inlet is configured to receive a forced flow of a first portion of a coolant flow, and a second inlet is configured to receive a second portion of the coolant flow. The forced first portion of coolant flow induces the second portion of coolant flow into the cyclone separator chamber for subsequent gas and liquid coolant separation of the first and second portions of coolant flow.

Air-cooled module for an air-cooled refrigeration cycle apparatus, comprising a desuperheater and condenser heat exchanger configured for being fluidly connected to compressor means of the air-cooled refrigeration cycle apparatus and a subcooler configured for being fluidly connected to expansion means of the air-cooled refrigeration cycle apparatus, both the desuperheater and condenser heat exchanger and the subcooler being configured to allow the passage of a refrigerant fluid inside themselves for cooling the refrigerant fluid thanks to an air flow directed to pass through these latter, the subcooler being fluidically in series downstream and physically separated with respect to the desuperheater and condenser heat exchanger, these latter elements being positioned relatively so the air flow passes before in the subcooler and then in the desuperheater and condenser heat exchanger.

A gas-liquid separation device comprises a container, an inlet tube, a liquid outlet tube, a gas outlet tube, and a swirl vane. The swirl vane is disposed in the inlet tube. A depression is provided on an inner circumferential surface of the inlet tube. The depression faces the swirl vane.

Cooling system using vacuum cooling and method for operating the same, said system having a refrigerant circulation, the refrigerant circulation comprising: a vacuum chamber, a vacuum pump, a first flow of a heat exchanger of the cooling system having at least two flows, and a condensate reservoir, wherein the vacuum chamber, the vacuum pump, the first flow and the condensate reservoir are connected, wherein a refrigerant contained within the refrigerant circulation is liquid at 20 C and 101325 Pa, wherein the system further comprises a separator having an inlet connected to the condensate reservoir for receiving a gaseous phase from the condensate reservoir, an outlet connected to an inlet of the vacuum pump and an exhaust for leakage air.

Cooling system using vacuum cooling and method for operating the same, said system having a refrigerant circulation, the refrigerant circulation comprising: a vacuum chamber, a vacuum pump, a first flow of a heat exchanger of the cooling system having at least two flows, and a condensate reservoir, wherein the vacuum chamber, the vacuum pump, the first flow and the condensate reservoir are connected, wherein a refrigerant contained within the refrigerant circulation is liquid at 20 C and 101325 Pa, wherein the system further comprises a separator having an inlet connected to the condensate reservoir for receiving a gaseous phase from the condensate reservoir, an outlet connected to an inlet of the vacuum pump and an exhaust for leakage air.

A high-efficiency, motorless purge system for closed-cycle absorption heat pumps, adapted for both absorption heat transformers and absorption chillers, using a series of valves to control the entry and exit of absorbent solution into a low-pressure, secondary absorption vessel. A small percentage of the total circulating solution is forced under pressure into the secondary absorption vessel via a spray nozzle, causing adiabatic absorption of absorbate vapor by the solution. Non-condensable gases accumulate in the secondary absorber until a certain vapor pressure is reached, upon which, gas, and possibly liquid, are transferred to an exhaust vessel having an exit vent for non-condensable gases. In an absorption chiller system, the secondary absorber has an internal heat exchanger to lower the temperature of the solution within, to facilitate the absorption process.

The present disclosure discloses a nano-separation refrigeration system and discloses a refrigeration circulation method, wherein the nano-separation refrigeration system includes an evaporator provided with an inlet and an outlet; a condenser provided with a condensation cavity, a gas inlet, a gas outlet, and a liquid outlet, wherein a molecular sieve membrane is disposed in the condensation cavity between the gas inlet and the gas outlet, and the molecular sieve membrane is configured to separate a mixed gas; a first connecting pipe having one end connected to the outlet and the other end to the gas inlet; a second connecting pipe having one end connected to the liquid outlet and the other end to the inlet; a third connecting pipe having one end connected to the gas outlet and the other end to the inlet.