The present invention pertains to cooling, heating, and refrigeration cycles using, for example, phase transitions to pump heat. Embodiments of the present invention may comprise systems, methods, or processes for liquid-liquid phase transition refrigeration cycles pumping heat across temperature differences greater than the adiabatic temperature change of a liquid-liquid phase transition within said liquid-liquid phase transition refrigeration cycle. Embodiments of the present invention also may comprise powering said liquid-liquid phase transition refrigeration cycle using electricity, heat, cold, the mixing of a saltwater and freshwater, the mixing of high osmotic pressure liquid and low osmotic pressure liquid, or a combination thereof.

The invention discloses a method for converting thermal energy into mechanical energy, and/or for cooling, comprising the steps of at least partly evaporating a working fluid, expanding said evaporated working fluid, absorbing said expanded working fluid into a liquid absorption mixture, at least partly extracting the absorption mixture from the absorber, pressurizing said extracted absorption mixture, separating said pressurized absorption mixture into a working effluent and an absorption effluent, and feeding said working and absorption effluent to the evaporator and absorber respectively. In particular, during said separation, the absorption mixture is subjected to a pressure at or above the condensation pressure of the substantially pure working fluid, and/or to a temperature at or below the condensation temperature of the substantially pure working fluid. The invention further discloses a closed-cycle absorption system, preferably suitable for performing the method.

The present disclosure relates to an absorption cooling machine including an absorber, a first regenerator, a second regenerator, a condenser, an expansion device, and an evaporator, and relates to a cooling machine that prevents the refrigerant from flowing backward to the first regenerator under a low pressure condition by installing a gas-liquid separator that separates the refrigerant discharged from the first and second regenerators and flows into the condenser into a gas state and a liquid state, in order to heat the absorption solution supplied from the absorber to separate into a refrigerant and an absorbent, and to smoothly discharge the refrigerant from the first regenerator and the second regenerator for discharging the separated refrigerant to the condenser.

The present disclosure relates to an absorption cooling machine including an absorber, a first regenerator, a second regenerator, a condenser, an expansion device, and an evaporator, and relates to a cooling machine that connects a bypass collection pipe that guides an absorbent flowing back into the second regenerator to be collected into an absorber to a second collection pipe, in order to prevent the water level of the second regenerator from being raised as the absorbent cannot be collected by the absorber and flows back to the second regenerator, due to the pressure difference between an absorbent separated from the first regenerator and collected into the absorber through the first collection pipe, and an absorbent separated from the second regenerator and collected into the absorber through the second collection pipe.

A method operates an absorption heat pump system, specifically the flow of hydronic cooling fluid through the condenser during system start-ups, or when the cooling fluid temperature is low. To minimize the time for an absorption heat pump to reach full cooling or heating capacity, it is desirable for the high side pressure to increase as fast as possible, and the low side pressure to decrease as fast as possible. Since the high side pressure is a function of the temperature of the refrigerant exiting the condenser, if the condenser cooling fluid temperature is low, the corresponding high side pressure will be low, which may not permit adequate working fluid flow rates from the high pressure side of the system to the low pressure side.

An absorption heat pump device includes a heat exchange unit through which a heat exchange fluid flows, a rotor that includes a hollow rotary shaft member including a first internal flow path and discharges a solution in the first internal flow path by a centrifugal force, and an application member that moves with rotation of the rotor to apply the solution, which flows through the first internal flow path and is discharged, along a heat transfer surface of the heat exchange unit.

The present invention relates to a low-power absorption refrigeration machine that enables the use of air as a refrigerant and has an evaporation unit that is separated from the rest of the absorption refrigeration machine and works with LiBr/H.sub.2O, H.sub.2O/NH.sub.3, LiNO.sub.3/NH.sub.3 or similar solutions, configuring an air-air machine wherein cold is produced directly in the enclosure to be air conditioned without need for impeller pumps and fan coils.

The integrated solar absorption heat pump system includes an absorption heat pump assembly (AHPA) having a generator, a condenser in fluid communication with the generator, an evaporator/absorber in fluid communication with the condenser and the generator, and a heat exchanger in communicating relation with the evaporator/absorber; a solar collector in fluid communication with the generator of the AHPA; a photovoltaic thermal collector in communicating relation with the evaporator/absorber of the AHPA; a plurality of pumps configured for pumping a fluid throughout the system to provide the desired heating or cooling; a power storage source, e.g., a solar battery, in communicating relation with the photovoltaic thermal collector; and a coil unit in communicating relation to the evaporator/absorber for receiving an air-stream. The absorption heat pump assembly can include an absorber and a solution heat exchanger.

The integrated solar absorption heat pump system includes an absorption heat pump assembly (AHPA) having a generator, a condenser in fluid communication with the generator, an evaporator/absorber in fluid communication with the condenser and the generator, and a heat exchanger in communicating relation with the evaporator/absorber; a solar collector in fluid communication with the generator of the AHPA; a photovoltaic thermal collector in communicating relation with the evaporator/absorber of the AHPA; a plurality of pumps configured for pumping a fluid throughout the system to provide the desired heating or cooling; a power storage source, e.g., a solar battery, in communicating relation with the photovoltaic thermal collector; and a coil unit in communicating relation to the evaporator/absorber for receiving an air-stream. The absorption heat pump assembly can include an absorber and a solution heat exchanger.

The present invention pertains to cooling, heating, and refrigeration cycles using, for example, phase transitions to pump heat. Embodiments of the present invention may comprise systems, methods, or processes for liquid-liquid phase transition refrigeration cycles pumping heat across temperature differences greater than the adiabatic temperature change of a liquid-liquid phase transition within said liquid-liquid phase transition refrigeration cycle. Embodiments of the present invention also may comprise powering said liquid-liquid phase transition refrigeration cycle using electricity, heat, cold, the mixing of a saltwater and freshwater, the mixing of high osmotic pressure liquid and low osmotic pressure liquid, or a combination thereof.