| abstract |
According to the present invention, refrigerant compositions are disclosed. The composition comprises HFC-32, HFC-125, HFO-1234yf, HFC-134a and CO2 . In the method for replacing refrigerant R-410A or R-22 in a refrigeration system, an air-conditioning system or a heat pump system, the refrigerant composition can be used in the method of cooling and heating. These inventive compositions are non-flammable and match the cooling performance of R-22 and R-410A within ±15%. Additionally, these compositions can act as replacements for R-404A, R-507, R407A, R407C and/or R-407F in refrigeration systems, air conditioning systems or heat pump systems. Compositions as described herein have unexpected flammability properties. |