A kind of mixed refrigerant replacing hcfc-22 and its preparation method and application

Abstract

The invention provides a mixed refrigerant replacing HCFC-22 as well as a preparation method and application thereof. Under the working condition of high temperature, the mixed refrigerant is formed by 76-90% of fluoroethane, 1-11% of propylene and 1-23% of propane by mass percent. Under the working condition of medium temperature, the mixed refrigerant is formed by 1-92% of fluoroethane, 1-52% of propylene and 1-79% of propane by mass percent. During preparation, fluoroethane, propylene and propane are mixed uniformly in a liquid state in proportion. The mixed refrigerant has the advantages that the ODP (ozone depletion potential) is equal to 0; the GWP (global warming potential) is less than 12; the evaporation pressure, the condensation pressure, the pressure ratio and the standard boiling point of the mixed refrigerant are close to the evaporation pressure, the condensation pressure, the pressure ratio and the standard boiling point of HCFC-22; the temperature glide is less than 3K; the cycle performance coefficient, the unit mass refrigerating capacity, the unit volume refrigerating capacity and the standard volume refrigerating capacity of the mixed refrigerant are better than the cycle performance coefficient, the unit mass refrigerating capacity, the unit volume refrigerating capacity and the standard volume refrigerating capacity of HCFC-22; the unit mass power consumption and the exhaust temperature of the mixed refrigerant are lower than the unit mass power consumption and the exhaust temperature of HCFC-22; the mixed refrigerant can serve as a long-term substitute of HCFC-22 and can reduce the charge and energy consumption.

Description

technical field [0001] The invention belongs to the field of refrigerants, and relates to a mixed refrigerant replacing HCFC-22, a preparation method and application thereof. Background technique [0002] HCFC-22 is the most widely used refrigerant with excellent performance in the refrigeration industry today, and is also widely used in various occasions such as air conditioning, chemical industry, and ships. HCFC-22 has excellent chemical and physical properties, non-toxic, non-flammable, non-explosive, and has good safety in use; excellent thermodynamic properties and good miscibility with mineral oil, no corrosion to metal and non-metal materials, but its adiabatic compression The index is 1.194, the final compression temperature is high, and cooling measures should be taken when the compressor works under high pressure. ODP of HCFC-22=0.034, GWP=1700, discharge into the atmosphere will destroy the ozone layer and cause the greenhouse effect. "The Montreal Protocol on ...

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Problems solved by technology

[0006] However, there are no related reports on mixed refrigerants with overall performance better than HCFC-22. Therefore, the development of new mixed refrigerants with excellent performance that can replace HCFC-22 is still the research focus of the refrigerant industry.

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