HFO Refrigerant Compositions for HVAC Systems

A refrigerant composition for refrigeration applications with reduced global warming potential (GWP) compared to common refrigerants like R404A. The composition contains a blend of trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 1,3,3,3-tetrafluoropropene (R1234ze) in specific ratios. The composition has a GWP of 4 or less, flammability, refrigerating capacity, and discharge pressure similar to R404A.

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Low-GWP refrigerants for air conditioning and heating systems that achieve environmentally friendly performance while maintaining operational efficiency. The refrigerants comprise a blend of R-32, R-1132(E), and R-1234yf, with specific weight percentages optimized for system performance and environmental impact. These low-GWP refrigerants meet the requirements for low global warming potential (GWP < 150), non-flammability classification of 1 or 2L, and non-toxicity. The refrigerants can be used in a variety of applications, including air conditioning systems, heat pumps, and air-to-water systems, and can be employed in both single-component and blended formulations.

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Refrigerants for low-temperature applications that meet stringent environmental standards while maintaining performance. The invention comprises a fluoropropene compound, specifically 1,1-difluoropropene (R-1252z), which offers superior environmental performance compared to traditional hydrofluorocarbons (HFCs) and hydrochlorofluorocarbons (HCFCs) in low-temperature refrigeration systems. The compound, along with other fluorinated compounds like HFC-32 and HFO-1234zeE, enables the development of refrigerants with reduced global warming potential (GWP) and improved environmental fate characteristics. The refrigerants can be used in medium and low-temperature applications, including transport refrigeration systems, and can replace traditional R-454C refrigerants in existing systems.

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A refrigerant composition that combines the low global warming potential (GWP) of R32 with high COP, enabling efficient cooling while minimizing environmental impact. The composition comprises HFO-1123 (trifluoroethylene) and R32, achieving a COP comparable to R410A while maintaining GWP below that of R32. This composition is optimized for refrigeration systems where energy efficiency is paramount, particularly in applications requiring precise temperature control without compromising environmental performance.

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A refrigerant-liquid-oil blend for refrigeration systems that achieves improved refrigerant fraction and viscosity retention. The blend comprises a base oil containing polyvinyl ethers, polyalkylene glycols, or polyol esters, combined with a refrigerant containing trans-1,2-difluoroethylene (HFO-1132(E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf). The blend provides reduced refrigerant fraction and enhanced viscosity retention compared to using HFO-1234yf alone, while maintaining the same temperature and pressure conditions.

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Low-GWP refrigerants and heat transfer compositions for walk-in refrigeration and beverage coolers that meet stringent safety requirements while achieving environmentally friendly performance. The compositions comprise a refrigerant with a glide of less than 3°C, a GWP of less than 150, and a lower flame limit of 0.25 or greater, specifically designed for walk-in refrigeration systems of 3000 square feet or less and beverage coolers in corridors. The compositions can be used in applications where traditional refrigerants like R-448A are not permitted due to safety concerns. These compositions offer improved safety features while maintaining low environmental impact.

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Low-GWP refrigerants for walk-in coolers and beverage coolers in public spaces, particularly in 3000 sqft or less facilities. The refrigerants comprise a blend of HFO-1234yf, HFO-1132(E), and CO2, with specific concentrations optimized for low GWP (<10) and flame limit (≥0.25). These compositions achieve the required properties while maintaining excellent performance characteristics, including glide, safety, and environmental impact. The refrigerants are designed to meet the stringent requirements of walk-in coolers and beverage coolers in public spaces, enabling efficient cooling operations while minimizing environmental footprint.

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Compositions comprising (E)-1,2,3,3,3-pentafluoro-1-propene (R-1225ye(E) or HFO-1225ye(E)), HFO-1234yf, R-32, CO2, and optionally R-125 for use in refrigeration, air conditioning, or heat pump systems. These compositions provide high cooling capacity, low global warming potential, and improved energy efficiency compared to traditional HFC and HFC blends. The compositions can be used in applications requiring high cooling performance, such as commercial refrigeration systems, mobile refrigeration units, and heat pumps.

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A refrigerant composition comprising HFO-1132(E), R1234ze, and R1234yf, which exhibits superior performance characteristics compared to traditional R410A. The composition combines these HFCs in a single working fluid, offering enhanced refrigerating capacity, improved boiling point, and reduced environmental impact. The composition's unique molecular structure enables efficient phase transition and phase change, while maintaining low environmental impact.

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Refrigerant blends with reduced environmental impact and improved safety compared to existing refrigerants. The blends comprise HFC-32, HFO-1234yf, propylene, and optionally propane, HFC-125, and CO2. The blends have lower global warming potential than common refrigerants like R134a while also having lower flammability and toxicity. The HFC-32 reduces flammability compared to pure HFO-1234yf, and the CO2 helps further reduce flammability. The blends can be used in refrigeration and air conditioning systems.

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A refrigerant composition comprising 1,1-difluoroethylene (HFO-1132a), difluoromethane (R32), and 1,3,3,3-tetrafluoropropene (R1234ze) achieves the same refrigeration performance as R410A while significantly reducing its global warming potential. The composition combines HFO-1132a, R32, and R1234ze in a 99.5 mass % ratio, with optional additives of R1234ze, R1234yf, and R1234f. The refrigerant exhibits excellent performance characteristics, including high GWP reduction, efficient condensation, and superior temperature glide. It can be used as a working fluid in refrigerating machines, particularly in applications requiring low GWP and high performance.

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A refrigerant composition comprising HFO-1132, CF3I, R1234yf, and R32, which exhibits superior refrigerating capacity compared to conventional R410A. The composition achieves this through a unique blend of these four components, with specific requirements for the ratio of each component. The composition can be used as a working fluid in refrigerating machines, with the addition of a refrigeration oil. The working fluid exhibits excellent refrigerating capacity, with a refrigerating capacity ratio of 90% or more relative to R410A when the composition satisfies specific requirements.

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Air conditioner using a heat transfer composition that suppresses performance deterioration due to pressure loss in piping and suppresses combustibility. The composition comprises a refrigerant with a specific molecular structure that balances pressure loss and flammability requirements. The refrigerant contains at least 50% of HFOs with 3 or 4 carbon atoms, and a proportion of R290 greater than 5% and 19%. This composition provides an operating pressure approaching R410A or R32 while maintaining flammability limits for Class 3 refrigerants.

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Composition comprising HFO-1234yf and at least one additional compound selected from the group consisting of HFO-1234ze, HFO-1243zf, HCFC-243db, HCFC-244db, HFC-245cb, HFC-245fa, HCFO-1233xf, HCFO-1233zd, HCFC-253fb, HCFC-234ab, HCFC-243fa, ethylene, HFC-23, CFC-13, HFC-143a, HFC-152a, HFO-1243zf, HFC-236fa, HCO-1130, HCO-1130a, HFO-1336, HCFC-133a, HCFC-254fb, HCFC-1131, HCFO-1242zf, HCFO-1223xd, HCFC-233ab, HCFC-226ba, HFC-227ca.

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A refrigerant composition comprising a refrigerant, a refrigeration oil, and a stabilizer, for use as a working fluid in a refrigerating machine. The composition contains a refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (R32), 1,3,3,3-tetrafluoropropene (R1234ze), and carbon dioxide (CO2), and a stabilizer. The refrigerant composition, when used as a working fluid in a refrigerating machine, provides improved refrigerating capacity compared to R410A, while maintaining a GWP of 250 or less and a COP of 250 or less. The composition can be formulated with a refrigeration oil, which is typically a 10-50% mixture of refrigeration oil.

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A refrigerant composition comprising HFO-1132, R32, and R1234ze, with enhanced refrigerating capacity and lower global warming potential compared to R404A. The composition is designed for use in refrigeration systems where both high performance and environmental sustainability are critical. The refrigerant composition achieves 70% or higher refrigerating capacity relative to R404A while maintaining a GWP of 150 or less. It can be formulated with a refrigeration oil to achieve a working fluid for refrigeration machines.

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A refrigerant composition comprising HFO-1132(E), HFO-1132a, and R1234yf, as well as R32, with a specific ratio, for use in refrigeration systems. The composition exhibits improved performance characteristics compared to conventional R410A, including enhanced refrigerating capacity, improved condensation and evaporation rates, and reduced environmental impact. The composition contains a single tracer at concentrations of 10-1000 ppm by weight, with the tracer concentration optimized for maximum performance. The composition can be used as a working fluid in refrigeration systems, including air conditioning and refrigeration systems, without the need for additional refrigeration oils.

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A refrigerant composition for refrigeration systems that offers improved performance, safety, and environmental benefits compared to conventional hydrofluorocarbon (HFC) and hydrofluoroolefin (HFO) refrigerants. The composition comprises a compound selected from or a mixture thereof, specifically pentafluoro-1-propene (E-1,2,3,3,3-pentafluoropropene) and HFO-1225ye (E), which exhibit enhanced supercooling properties and lower GWP compared to conventional HFCs. The composition can be used in refrigeration, air conditioning, and heat pump systems as a direct substitute for existing refrigerants, enabling improved performance, safety, and environmental sustainability.

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A refrigerant for refrigeration, air conditioning, and heat pump systems that replaces traditional hydrochlorofluorocarbons (HCFCs) while maintaining ozone depletion-free and low global warming potential characteristics. The refrigerant, a mixture of R-1225y and HFO-1234yf, offers superior cooling performance compared to HCFCs while achieving GWP below 300. It can be used in fixed and mobile applications, including refrigerators, air conditioners, heat pumps, chillers, freezers, and evaporative coolers.

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A refrigerant composition for low-GWP refrigeration systems, particularly in automotive applications. The composition comprises a refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)) and 1,3,3,3-tetrafluoropropene (R1234ze), in a specific ratio. This composition offers a refrigerant with improved performance characteristics compared to traditional R404A, including enhanced refrigerating capacity and lower global warming potential. The composition is used as a working fluid in refrigeration systems, particularly in vehicles, where engine exhaust heat is not utilized.

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A refrigerant composition and method for refrigeration systems that achieves low global warming potential (GWP) while maintaining high efficiency and performance. The composition contains a novel refrigerant that combines the properties of hydrofluoroalkanes (HFCs) with those of hydrofluorocarbons (HFCs), achieving COP and refrigeration capacity ratios of 100% or more while maintaining GWP below 500. The composition is specifically designed to maintain the refrigeration cycle's performance while reducing the environmental impact of traditional refrigerants.

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A refrigerant composition that combines a low-GWP hydrofluoroolefin refrigerant with a non-flammable refrigerant to achieve equivalent or higher refrigerating capacity and COP compared to traditional HFC refrigerants. The composition comprises a hydrofluoroolefin refrigerant, a non-flammable refrigerant with a higher boiling point, and a lower boiling point non-flammable refrigerant. The non-flammable refrigerant has a boiling point higher than the hydrofluoroolefin, while the hydrofluoroolefin has a lower boiling point. This composition maintains non-flammability and maintains the refrigerating properties of the hydrofluoroolefin while achieving the desired COP and capacity.

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A refrigerant for air conditioning systems that achieves equivalent performance to R410A while meeting stringent environmental standards. The refrigerant comprises CO2 (R744), hexafluoropropene (FO-1216), and difluoromethane (HFC-32) in a 1:1:0.1 ratio. This composition has a low global warming potential (GWP), low flammability, equivalent COP to R410A, and comparable refrigerating capacity. The refrigerant can be used as a working fluid in conventional air conditioning systems, including vehicles, while maintaining the same performance characteristics as R410A.

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A refrigerant composition that can replace R404A, R507, and R410A refrigerants in cooling and air conditioning systems, particularly in applications requiring lower temperatures. The composition has a GWP of less than 500, with a maximum operating pressure of 3 bar or less at 45 °C. It is particularly suitable for applications where R404A and R410A are being phased out due to environmental regulations. The composition can be used in both new and refurbished systems, enabling continuous operation while minimizing the need for costly equipment refurbishment.

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A refrigerant composition that achieves a 2L flammability limit and meets the GWP limit of R410A while maintaining slight combustion. The composition contains a mixed refrigerant comprising R32, HFO-1132E, and R1234yf. It exhibits a refrigerating capacity ratio of 80% or more, a GWP of 250 or less, and a WCF of slight combustion. The composition is used in refrigeration systems to provide efficient cooling while meeting stringent flammability and environmental standards.

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Low GWP, low toxicity, and low flammability refrigerant blends for use in vehicles and buildings. The blends contain HFO-1234yf (also known as Solmontane) along with propane (R290) or ethane (R170) in near-azeotropic or azeotropic compositions. The blends have improved heating and cooling performance compared to pure HFO-1234yf at low temperatures. The glide is less than 3 K at -30°C to 10°C. The blends have lower GWP, toxicity, and flammability than conventional refrigerants.

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A refrigerant for air conditioning and heat pump systems with improved environmental performance. The composition comprises from 1 to 60% by weight R-1132a, from 1 to 99% by weight R-32, and from 1 to 99% by weight R-1234yf. The composition achieves reduced greenhouse gas emissions while maintaining comparable refrigeration performance, with improved flammability characteristics. The composition can be used in existing systems as a retrofit or conversion fluid, or as a drop-in replacement for R-410A.

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Refrigerant composition with low global warming potential (GWP) and improved flammability compared to conventional refrigerants like R-134a. The composition contains a mixture of hydrofluoroolefins (HFOs) like R-1234ze and R-1243zf, along with the non-combustible refrigerant FO-1216. The HFOs provide the cooling performance, while FO-1216 improves flammability and reduces GWP. The composition can also contain additional non-combustible hydrofluoroethers like HFE-227me.

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A refrigerant composition for low-temperature applications that replaces HFC-404A while maintaining performance characteristics. The composition comprises a blend of HFC-32, HFC-125, HFO-1234yf, and HFO-1234ze in a ratio of 10-35% by weight, with HFC-134a in the remaining proportion. This blend provides excellent cooling performance comparable to HFC-404A while having significantly lower global warming potential (GWP) and non-flammable properties. The composition can be used in existing low-temperature refrigeration systems without significant engineering modifications, enabling safe and reliable operation in applications where HFC-404A is used.

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A refrigerant composition that combines the properties of R-410A with improved performance characteristics for heat transfer applications. The composition comprises a multi-component mixture of HFC-32, HFO-1234ze, and HFC-125, with the HFC-125 content optimized for enhanced glide, heat capacity, burning rate, and hazard properties. The composition maintains refrigerant capacity while achieving lower global warming potential (GWP) compared to conventional R-410A-based refrigerants. It is particularly suitable for applications requiring high efficiency and low environmental impact, such as air conditioning and refrigeration systems.

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Low-temperature refrigerant compositions for replacement of HFC-404A in refrigeration systems, particularly in low-temperature applications like food storage. These compositions, with GWP values below 2500, offer superior performance and environmental benefits compared to HFC-404A while maintaining chemical stability and non-flammability. The compositions can be used in existing systems without significant system modifications, enabling efficient retrofitting while minimizing environmental impact.

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