Environment-friendly refrigerant

Abstract

The invention discloses an environment-friendly refrigerant used for refrigerators, air-conditioners and heat pumps. The refrigerant is composed of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)), 1,1-difluoroethane (HFC-152a) and difluoromethane (HFC-32). The preparation method is characterized by physically mixing the components under normal temperature according to corresponding proportion. The ozone depletion potential (ODP) is zero and the global warming potential (GWP) is low, therefore, the refrigerant conforms to the requirement of environmental protection, and the refrigerant has physical property equivalent to that of HFC-134a and can be used in the existing HFC-134a system and serve as the substitute refrigerant of HFC-134a.

Description

technical field [0001] The invention relates to a refrigerant composition, in particular to an environment-friendly refrigerant used to replace HFC-134a in existing refrigeration, air-conditioning or heat pump equipment using HFC-134a. Background technique [0002] Freons represented by HCFC-22, CFC-12, and CFC-11 have excellent thermodynamic cycle performance and are widely used in refrigeration, air conditioning and other industries. However, such substances have high ozone depletion potential (ODP), stay in the atmosphere for a long time, and have high global warming potential (GWP). They are one of the main chemical substances that destroy the atmospheric ozone layer and produce the greenhouse effect. After the ozone layer is destroyed, harmful ultraviolet radiation will directly reach the surface of the earth, causing serious damage to crops and phytoplankton in the ocean, and will also affect the human immune system, increasing the incidence of skin cancer and cataract...

AI Technical Summary

Problems solved by technology

However, these refrigerants have their own advantages and disadvantages, and they are still not very ideal.

Among them, the heat transfer performance of R407C is poor, and the volume cooling capacity and COP value under the same working conditions are smaller than HCFC-22. In order to achieve the same cooling capacity as HCFC-22, it is necessary to strengthen the heat transfer effect of the heat exchanger, and the manufacturing cost will increase

The volumetric cooling capacity of R410A is much larger than that of HCFC-22, but its evaporation pressure and condensation pressure are also much higher than that of HCFC-22. roads and systems, and both of these two mixed refrigerants have high GWP values, a large amount of emissions will aggravate global warming

HFC-134a has excellent thermodynamic properties and good safety in use, and has become a widely used refrigerant in the refrigeration and air-conditioning industry at home and abroad. Its ODP is zero, but its GWP is still high, and a large amount of use will also cause global warming.