An absorption refrigeration system (ARS), includes a sorbent-refrigerant pair that has an ionic liquid (IL) sorbent and a refrigerant that displays a lower critical lower critical solution temperature (LCST) at a temperature of 50 to 100 C., wherein the separation of the sorbent from the refrigerant occurs upon heating the sorbent-refrigerant pair to a temperature above the LCST. This liquid-liquid phase separation requires significantly less energy to desorb the refrigerant from the sorbent than vapor-liquid phase separation in traditional ABSs.

An absorption refrigeration system (ARS), includes a sorbent-refrigerant pair that has an ionic liquid (IL) sorbent and a refrigerant that displays a lower critical lower critical solution temperature (LCST) at a temperature of 50 to 100 C., wherein the separation of the sorbent from the refrigerant occurs upon heating the sorbent-refrigerant pair to a temperature above the LCST. This liquid-liquid phase separation requires significantly less energy to desorb the refrigerant from the sorbent than vapor-liquid phase separation in traditional ABSs.

In some embodiments, an air-cooled ammonia refrigeration system comprises: an air-cooled condenser comprising a heat exchanger and at least one axial fan; an evaporator coupled to the air-cooled condenser; a subcooler positioned between the air-cooled condenser and the evaporator; a compressor coupled to the evaporator; an oil cooler coupled to the compressor; a water system coupled to the air-cooled condenser, the water system comprising a water source, a water pump, and a plurality of spray nozzles positioned below the air-cooled condenser; and a control circuit coupled to the air-cooled condenser and the water system, the control circuit configured to pulse atomized water through the plurality of spray nozzles to a surface of the air-cooled condenser when a head pressure of the air-cooled condenser is higher than a predetermined value.

A cooling system and a related method is presented. The cooling system includes a reservoir configured to selectively supply a cooling fluid; a circulation loop fluidly coupled to the reservoir, and configured to circulate the cooling fluid to and from the reservoir, and a heat exchanger thermally coupled to the circulation loop and configured to exchange heat with the cooling fluid. The reservoir includes a refrigerant and an anti-freeze additive. The anti-freeze additive is characterized by a lower critical solution temperature (LCST) such that when an operating temperature of the reservoir is greater than the LCST, the reservoir is configured to supply a cooling fluid including the refrigerant to the circulation loop; and when the operating temperature of the reservoir is lower than the LCST, the reservoir is configured to supply a cooling fluid including the refrigerant and the anti-freeze additive to the circulation loop.

An absorption cycle apparatus including a working fluid is presented. The working fluid includes a metal halide, water and a zwitterion additive, wherein the zwitterion additive includes an amino acid, 2,2-[(phosphonomethyl)imino]diaceticacid, 3-[(2-hydroxyethyl)amino]-1-propanesulfonic acid, or combinations thereof. A method of controlling crystallization in a working fluid of an absorption cycle apparatus is also presented.

In some embodiments, an air-cooled ammonia refrigeration system comprises: an air-cooled condenser comprising a heat exchanger and at least one axial fan; an evaporator coupled to the air-cooled condenser; a subcooler positioned between the air-cooled condenser and the evaporator; a compressor coupled to the evaporator; an oil cooler coupled to the compressor; a water system coupled to the air-cooled condenser, the water system comprising a water source, a water pump, and a plurality of spray nozzles positioned below the air-cooled condenser; and a control circuit coupled to the air-cooled condenser and the water system, the control circuit configured to pulse atomized water through the plurality of spray nozzles to a surface of the air-cooled condenser when a head pressure of the air-cooled condenser is higher than a predetermined value.

A microwave-assisted hybrid solar vapor absorption system that converts anergy into exergy and works sustainably without the intermittence associated with the single absorption vapor absorption systems. The heat required for the generator in a vapor absorption system is provided by preheating the water through solar collectors and by using the vehicle's waste heat in conjunction with solar heat, collecting the waste heat and the solar heat into circulating water or other thermal fluids like mineral oil through the vehicle's radiator, the vehicle's exhaust pipe, and a solar collector. By combining the waste heat and the solar heat, the system achieves the required generator temperature. By introducing dielectric heating and by differentially heating only the refrigerant fluid, and not the absorbent fluid, the required pressure for refrigeration is achieved, while allowing the absorbent fluid to remain significantly cooler than the refrigerant. This increases the Coefficient of Performance to 0.95.

Chemical heat pump system 1 includes: endothermic unit 3 that contains a slurry containing a solid product and that absorbs heat supplied from an outside to perform an endothermic reaction at first pressure P.sub.1; exothermic unit 2 that contains a slurry containing a solid reactant and that performs an exothermic reaction at a second pressure P.sub.2 that is higher than the first pressure P.sub.1 to generate heat; gas recovery supply unit 4 that recovers a gas reactant that has been decomposed in endothermic unit 3 and that supplies the gas reactant to exothermic unit 2; and circulation unit 5 that supplies the slurry containing the solid reactant, that has been decomposed in endothermic unit 3, to exothermic unit 2 after pressurizing the slurry from first pressure P.sub.1 to second pressure P.sub.2, and that supplies the slurry containing the solid product, that has been produced in exothermic unit 2, to endothermic unit 3 after depressurizing the slurry from second pressure P.sub.2 to first pressure P.sub.1, so as to circulate the slurry between endothermic unit 3 and exothermic unit 2.

A transport refrigeration system (TRS) and method of operating a TRS having a sorption subsystem are disclosed. The TRS includes a refrigeration subsystem and a sorption subsystem. The refrigeration subsystem includes a refrigerant, a compressor, a refrigerant condenser, a refrigerant expansion device, and a refrigerant evaporator in fluid communication such that the refrigerant can flow therethrough. The sorption subsystem includes a heat transfer fluid, a heat source, a boiler, a sorption condenser, a sorption expansion valve, a sorption evaporator, and a pump in fluid communication such that the heat transfer fluid can flow therethrough. The sorption evaporator is in thermal communication with the refrigeration subsystem.

The present invention regards a thermally driven, environmental control unit including, in a closed fluid-flow, non-pressurized circuit, a mixing heat exchanger, a heat recovery unit, a fractionator/evaporator, and one or more condensers. The system is designed to include at least one solute and a solvent, selected so that the mixture of each solute and the solvent produce an enthalpy change of between about 5 to 30 kJ/mol for cooling and 10 to 200 kJ/mol for heating. A plurality of pumps is integrated into the system to move the solute and the solvent, and a mixture thereof, among the various components of the present invention. The unit further includes a liquid loop coupled with the mixing heat exchanger and an air handler to provide warm or cool supply air. The present invention further regards a process for cooling or heating air using enthalpy change of solution associated with the dissolution of a solute in a solvent, at relatively constant atmospheric pressure, and separation of the solute from the solvent for re-use in the process.