Heat Transfer Enhancement with Advanced Refrigerants

Fluoropropene-based refrigerant compositions that meet evolving regulatory requirements for refrigerants with low ozone depletion potential (ODP) and low global warming potential (GWP). The compositions contain Z-1,3,3,3-tetrafluoropropene as the fluorinated component, with HFC-1234ze(Z) and HFC-1336mzz(E) as additional components. The Z-isomer is produced through selective isomerization of the starting material in the gas phase or liquid phase, followed by recovery and conversion to the Z-isomer.

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A refrigerant composition comprising a mixture of refrigerant gas combinations that do not deplete the ozone layer to replace R-22 refrigerant. The composition includes a combination of refrigerants such as isobutene, 1-chloro-3, 3, 3-trifluoropropene, 1, 1, 1, 2, 2-pentafluoroethane, and 1, 1, 1, 2-tetrafluoroethane, with an isobutene content of 0.1 to 2% by weight, and a maximum of 0.4% of 1-chloro-3, 3, 3-trifluoropropene.

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Refrigerant compositions for replacing R-410A and R-32 in air conditioning and refrigeration systems with lower global warming potentials. The compositions are miscible with common lubricants, have good heat transfer, stability, and flammability, and can be used in existing systems without major changes. The refrigerant blends contain HFC-32, HFO-1234yf, and a trace of HFC-161. The compositions have GWPs below 300 and can be used as alternatives to R-410A and R-32 in stationary air conditioning, refrigeration, and heat pump systems.

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Refrigerant compositions for hermetic compressors in vapor compression systems that achieve low discharge temperatures and high heat capacities while meeting regulatory requirements for low global warming potential (GWP) refrigerants. The compositions contain a combination of difluoromethane (R-32), 2,3,3,3-tetrafluoropropene (R-1234yf), and isobutane (R-600a) in a specific weight ratio. The refrigerant composition exhibits lower discharge temperatures compared to conventional refrigerants like R-404A, while maintaining high heat capacity. This composition is suitable for hermetic compressors used in refrigeration applications.

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Refrigerant composition for hermetic compressors in vapor compression systems that maintains low global warming potential (GWP) while providing comparable refrigeration performance. The composition comprises difluoromethane (R-32), 2,3,3,3-tetrafluoropropene (R-1234yf), and propane (R-290) in a blend ratio optimized for hermetic compressor operation. The composition achieves a balance of low GWP and high refrigerant properties, particularly in applications requiring medium to low evaporator temperatures.

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Heat transfer compositions that provide similar or better refrigeration performance, capacity, and safety compared to existing refrigerants like R-22 and R-404A, while achieving lower global warming potential. The compositions exhibit reduced flammability and maintain reduced flammability upon fractionation between liquid and vapor phases, with minimal changes in composition or pressure following leakage. They also maintain high efficiency and COP compared to R-22 and R-404A.

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A refrigerant composition for refrigeration systems that achieves low global warming potential (GWP) while maintaining excellent performance characteristics. The composition comprises at least 98.5% by weight of difluoromethane (HFC-32), 69.5% by weight of 2,3,3,3-tetrafluoropropene (HFO-1234yf), and 9.0% by weight of fluoroethane (HFC-161), with the remaining percentage comprising other HFCs. This composition provides a GWP of 150 or less while maintaining high heat transfer coefficients and chemical stability. The composition is suitable for use in residential air conditioning, variable refrigerant flow air conditioning, residential heat pumps, commercial air conditioning chillers, residential air-to-water heat pump hydronic systems, medium temperature refrigeration, low temperature refrigeration, mobile air conditioning, and mobile heat pumps.

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A refrigerant composition that combines the high performance of R410A with the low GWP of HFC-32, achieving both excellent performance and environmental benefits. The composition comprises a refrigerant comprising HFO-1132, HFO-1123, and HFC-32.

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Refrigerant blend with improved properties for air conditioning and heat pump systems compared to R-410A. The blend contains specific proportions of HFC-32, HFC-125, CF3I, and HFO-1234yf. It has better heat transfer, miscibility, and lubricant compatibility compared to R-410A. The blend ratio is about 46-48% HFC-32, 11-12% HFC-125, 34-36% CF3I, and 5-7% HFO-1234yf.

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An environmentally friendly refrigerant blend for air conditioning systems with lower global warming potential (GWP) compared to commonly used refrigerants like R134a. The blend contains fluoroethane (R161), trifluoromethyl methyl ether (RE143a), and dimethyl ether (RE170) in a specific proportion. The blend provides similar cooling capacity and efficiency to R134a while reducing GWP. The refrigerant blend can be used in existing air conditioning systems as a drop-in replacement.

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A refrigerant composition that enables environmentally friendly air conditioning systems while maintaining performance characteristics comparable to existing refrigerants. The composition comprises a mixture of difluoromethane (HFC-32), fluoromethane (HFC-41), and 2,3,3,3-tetrafluoropropene (HFO-1234yf), with a composition ratio optimized for refrigerant charge reduction and global warming potential (GWP) performance. The optimized ratio achieves a GWP of 300 or less, reduced refrigerant charge (8-10%), and improved volumetric capacity compared to conventional HFC-410A.

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A refrigerant composition for refrigeration applications with reduced global warming potential (GWP) compared to common refrigerants like R404A and R134a. The composition contains two hydrofluoroolefin (HFO) compounds, trans-1,2-difluoroethylene (HFO-1132) and 2,3,3,3-tetrafluoropropene (HFO-1234yf), in specific ratios. The compositions have equivalent or better cooling capacity and coefficient of performance compared to R404A and R134a while having lower GWP. This makes them suitable replacements for applications like vehicle air conditioning and refrigeration equipment. The composition ratios are: (1) HFO-1132:HFO-1234yf, 40.5-4

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Heat transfer compositions comprising coolant, lubricant, and stabilizer, the coolant consisting essentially of the following three compounds, each compound being present in the following relative percentages: The present invention includes heat transfer compositions comprising coolant, lubricant, and stabilizer, the coolant consisting essentially of the following three compounds, each compound being present in the following relative percentages: The present invention includes heat transfer compositions comprising coolant, lubricant, and stabilizer, the coolant consisting essentially of the following three compounds, each compound being present in the following relative percentages: The present invention includes heat transfer compositions comprising coolant, lubricant, and stabilizer, the coolant consisting essentially of the following three compounds, each compound being present in the following relative percentages: The present invention includes heat transfer compositions comprising coolant, lubricant, and stabilizer, the coolant consisting essentially of the following three compounds, each compound being present in the following relative percentages: The present invention includes heat transfer compositions comprising coolant, lubricant, and stabilizer, the coolant consisting essentially of the following three compounds, each compound being present in the following relative percentages: The present invention includes heat transfer compositions comprising coolant, lubricant, and stabilizer, the coolant consisting essentially of the following three compounds, each compound being present in the following

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Novel refrigerant compositions and heat transfer fluids with unique properties that can replace current refrigerants like HFC-134a. The compositions contain at least one fluoroolefin, such as 1-fluoro-2-butene or 1-fluoro-2-pentene. These fluoroolefins have low global warming potential and ozone depletion potential, and can be used in refrigeration, air conditioning, and heat pump systems.

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A refrigerant for air conditioning and refrigeration systems that replaces R-410A while maintaining excellent heat transfer properties. The refrigerant composition comprises at least 97% of a blend of four compounds, with specific percentages based on the total weight of the three compounds. This composition achieves the desired properties while avoiding the immiscibility issues with polyol ester (POE) lubricants commonly used in these applications. The composition is specifically designed to meet the unique requirements of both refrigeration and air conditioning systems, making it suitable for both low- and high-temperature applications.

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Composition de transfert de chaleur à base de difluorométhane, de pentafluoroéthane, de tétrafluoropropène et de propane, utilisée dans les systèmes de transfert de chaleur à basse pression, qui présente des performances élevées et un faible impact environnemental.

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A refrigerant composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and difluoromethane (R32), wherein A composition comprising a refrigerant, the refrigerant comprising HFO-1132(E), HFO-1123, and R32, wherein A composition comprising a refrigerant, the refrigerant comprising HFO-1132(E), HFO-1123, and R32, wherein A composition comprising a refrigerant, the refrigerant comprising HFO-1132(E), HFO-1123, and R32, wherein A composition comprising a refrigerant, the refrigerant comprising HFO-1132(E), HFO-1123, and R32, wherein A composition comprising a refrigerant, the refrigerant comprising HFO-1132(E), HFO-1123, and R32, wherein A composition comprising a refrigerant, the refrigerant comprising HFO-1132(E), HFO-1123, and R32, wherein A composition comprising a refrigerant, the refrigerant comprising HFO-1132(E

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A refrigerant and lubricant combination for refrigeration systems that enables efficient operation in both cooling and heating modes. The composition comprises a refrigerant containing 2,3,3,3-tetrafluoropropene and 1,1,1,2-tetrafluoroethane, combined with a lubricant that is miscible with the refrigerant over its entire operating temperature range. This pairing enables reliable operation in a wide range of refrigeration applications, including domestic refrigeration, commercial refrigeration, and industrial refrigeration systems.

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A refrigerant and lubricant blend for heat transfer applications, particularly in air conditioning systems, that offers superior performance and environmental benefits over conventional R-410A. The blend comprises a refrigerant with a specific molecular structure, a lubricant comprising polyol ester (POE) or polyvinyl ether (PVE), and a stabilizer that enhances the refrigerant's chemical stability and non-flammability. The stabilizer composition, comprising a blend of alkylated naphthalene and an acid depleting moiety, provides critical properties such as excellent heat transfer performance, chemical stability, and low toxicity, making it suitable for both new system design and retrofitting applications.

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Refrigerant compositions comprising difluoromethane and at least one multi-fluorinated olefin and/or fluoroiodocarbon, which exhibit zeotropic properties and are suitable for use in heat transfer systems such as refrigeration systems and air conditioning systems, particularly for applications requiring low global warming potential and high performance.

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