Abstract: Compositions and methods are described for reducing flammability in a heating, ventilation, and air conditioning (HVAC) system having R32 refrigerant included in the refrigerant composition. Refrigerant compositions and methods of use are described which can be used for retrofitting, servicing, controlling flammability, improving performance, lubricant solubility and miscibility, and improving the safety of an HVAC system.

Abstract: Methods, systems and apparatuses are described that are directed to on-site recovery and/or repurposing of refrigerant, where an original refrigerant is converted into a refrigerant different from the original refrigerant. The refrigerant different from the original refrigerant can have relatively lower global warming potential (GWP) than the original refrigerant. The recovery and/or repurposing can be implemented for example in a refrigeration circuit, such as for example in general cooling and/or heating applications, which may be embodied in a heating, venting, and air conditioning (HVAC) system and/or unit, in a transport refrigeration system and/or unit, as well as in commercial, residential and/or industrial cooling and/or heating applications.

Abstract: Heat is recovered from a heat source to heat water to high temperatures. Apparatuses, systems and methods are described to heat water to a high temperature by using heat, such as may be considered in some instances as waste heat, recovered from a heat source. The methods, systems, and apparatuses described utilize low pressure refrigerant(s) as a fluid to provide a refrigeration cycle that utilizes a source of heat to heat water to a high temperature. The refrigeration cycle can be with or without a cascade cycle. The refrigerant cycle in some examples uses an oil free compressor.

Abstract: Refrigerant compositions are described, which can be used for example, in refrigeration, air conditioning, and/or heat pump systems which for example, can be incorporated into a heating, ventilation and air conditioning (HVAC) system or unit. The refrigerant composition includes an amount of a R125 refrigerant, an amount of a R32 refrigerant, and an amount of a R1234yf refrigerant, where the R32 refrigerant has higher flammability than the R125 refrigerant, and the R1234yf refrigerant has higher flammability than the R125 refrigerant.

Abstract: A detection system and method of detection directed towards the detection of refrigerant leaking from a refrigerant circuit in a heating, ventilation, air condition, and refrigeration (HVACR) system. The system including a refrigerant circuit utilizes a working fluid that also contains an additive fluid. The system also includes a detection device that can detect the additional fluid external to the refrigerant circuit. A method of detecting leaking refrigerant is includes adding a detectable fluid to a refrigerant circuit.

Abstract: Methods of using refrigerant compositions and systems thereof are described. In particular, methods of using refrigerant compositions and systems thereof, include refrigerant compositions including a two component blend. One of the components is a refrigerant blend that, when first combined, is considered an azeotropic blend, azeotrope, near azeotropic, or the like. This component is one component of the two components of the resulting refrigerant composition, which is combined with a second component being another refrigerant.

Abstract: Refrigerant compositions are described. In particular, refrigerant compositions are described that include a two component blend, where one of the components is a refrigerant blend that, when first combined, is considered an azeotropic blend, azeotrope, near azeotropic, or the like. This component is one component of the two components of the resulting refrigerant composition, which is combined with a second component being another refrigerant.

Abstract: Refrigerant compositions are described, which can be used for example, in refrigeration, air conditioning, and/or heat pump systems which for example, can be incorporated into a heating, ventilation and air conditioning (HVAC) system or unit. The refrigerant composition includes an amount of a R125 refrigerant, an amount of a R32 refrigerant, and an amount of a R1234yf refrigerant, where the R32 refrigerant has higher flammability than the R125 refrigerant, and the R1234yf refrigerant has higher flammability than the R125 refrigerant.

Abstract: Embodiments as disclosed herein are directed to a heat pump that employs at least two different refrigerants, each of which is optimized for either a cooling operation mode or a heating operation mode. The embodiments as disclosed herein can help increase the capacity and/or efficiency of a heat pump in both the cooling operation mode and the heating operation mode. In addition, the embodiments as disclosed herein may also eliminate the need for a ground source in a relatively low ambient temperature environment.

Abstract: A transport refrigeration system (TRS) includes a first heat transfer circuit including a first compressor, a condenser, a first expansion device, and a cascade heat exchanger. The first compressor, the condenser, the first expansion device, and the cascade heat exchanger are in fluid communication such that a first heat transfer fluid can flow therethrough. The TRS includes a second heat transfer circuit including a second compressor, the cascade heat exchanger, a second expansion device, and an evaporator. The second compressor, the cascade heat exchanger, the second expansion device, and the evaporator are in fluid communication such that a second heat transfer fluid can flow therethrough. The first heat transfer circuit and the second heat transfer circuit are arranged in thermal communication at the cascade heat exchanger such that the first heat transfer fluid and the second heat transfer fluid are in a heat exchange relationship at the cascade heat exchanger.

Abstract: Refrigerant compositions are described, which can be used for example, in refrigeration, air conditioning, and/or heat pump systems which for example, can be incorporated into a heating, ventilation and air conditioning (HVAC) system or unit. The refrigerant composition includes an amount of a R125 refrigerant, an amount of a R32 refrigerant, and an amount of a R1234yf refrigerant, where the R32 refrigerant has higher flammability than the R125 refrigerant, and the R1234yf refrigerant has higher flammability than the R125 refrigerant.

Abstract: Refrigerant compositions are described, which can be used for example, in refrigeration, air conditioning, and/or heat pump systems which for example, can be incorporated into a heating, ventilation and air conditioning (HVAC) system or unit. The refrigerant composition includes an amount of a R125 refrigerant, an amount of a R32 refrigerant, and an amount of a R1234yf refrigerant, where the R32 refrigerant has higher flammability than the R125 refrigerant, and the R1234yf refrigerant has higher flammability than the R125 refrigerant.

Abstract: Refrigerant compositions are described. In particular, refrigerant compositions are described that include a two component blend, where one of the components is a refrigerant blend that, when first combined, is considered an azeotropic blend, azeotrope, near azeotropic, or the like. This component is one component of the two components of the resulting refrigerant composition, which is combined with a second component being another refrigerant.

Abstract: Refrigerant compositions are described, which can be used for example, in refrigeration, air conditioning, and/or heat pump systems which for example, can be incorporated into a heating, ventilation and air conditioning (HVAC) system or unit. The refrigerant composition includes an amount of a R125 refrigerant, an amount of a R32 refrigerant, and an amount of a R1234yf refrigerant, where the R32 refrigerant has higher flammability than the R125 refrigerant, and the R1234yf refrigerant has higher flammability than the R125 refrigerant.

Abstract: Compositions and methods are described for reducing flammability in a heating, ventilation, and air conditioning (HVAC) system having R32 refrigerant included in the refrigerant composition. Refrigerant compositions and methods of use are described which can be used for retrofitting, servicing, controlling flammability, improving performance, lubricant solubility and miscibility, and improving the safety of an HVAC system.

Abstract: An absorption apparatus for an absorption chiller includes a series of eliminator blades situated between a vaporizing chamber (e.g., a generator or an evaporator) and a devaporizing chamber (e.g., a condenser or an absorber). Each of the blades includes an upstream leg, a downstream leg and a deflection tab. With respect to the direction of vapor flowing from the vaporizing chamber to the devaporizing chamber, the upstream leg is at an upward incline and the downstream leg is at a downward incline. The deflection tab extends out over the downstream leg to create a concavity that helps prevent liquid in the devaporizing chamber from splashing back across the eliminator blade. In some embodiments, a tube support plate includes a series of holes for not only supporting the tube bundles of two heat exchangers but also for supporting the eliminator blades.

Abstract: An absorption apparatus for an absorption chiller includes a series of eliminator blades situated between a vaporizing chamber (e.g., a generator or an evaporator) and a devaporizing chamber (e.g., a condenser or an absorber). Each of the blades includes an upstream leg, a downstream leg and a deflection tab. With respect to the direction of vapor flowing from the vaporizing chamber to the devaporizing chamber, the upstream leg is at an upward incline and the downstream leg is at a downward incline. The deflection tab extends out over the downstream leg to create a concavity that helps prevent liquid in the devaporizing chamber from splashing back across the eliminator blade. In some embodiments, a tube support plate includes a series of holes for not only supporting the tube bundles of two heat exchangers but also for supporting the eliminator blades.

Abstract: A heat absorption system having a first absorption circuit for operation at a first temperature range and a second absorption circuit for operation at a second temperature range, the temperature range of the second absorption circuit having a lower maximum temperature relative to the first temperature range of the first absorption circuit. The first absorption circuit includes a first circuit generator, a first circuit condenser, and a first circuit absorber operatively connected together. The second absorption circuit includes a second circuit generator, a second circuit condenser, and a second circuit absorber operatively connected together. A common evaporator is operatively connected to each of the first circuit condenser and the second circuit condenser and is in heat exchange communication with an external heat load. The first circuit condenser and the first circuit absorber are in heat exchange communication with the second circuit generator.

Abstract: A refrigerant/absorbent composition is disclosed which comprises an aqueous solution of at least one lithium halide, at least one zinc halide, and a corrosion inhibiting amount of thiocyanate ion. Also, a method of inhibiting corrosion of the metallic parts of an absorption heat transfer machine by adding a thiocyanate compound to a refrigerant/absorbent composition is disclosed. Further disclosed is a triple-effect absorption heat transfer machine having a working fluid in contact with metallic parts, said working fluid comprising a corrosion inhibiting amount of at least one thiocyanate salt.