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Choose R22 or R134a refrigerant for large-scale flake ice machine

Large-scale flake ice machines have a large demand for refrigerants. The most used refrigerant in my country is R22. R22 refrigerant is cheap and has excellent performance. It is the refrigerant of choice for large and medium-sized flake ice machines, but because R22 refrigerant destroys the ozone layer and is not an environmentally friendly refrigerant, according to international conventions, R22 refrigerant can still be used until 2040. The application analysis performance of R22 refrigerant and R134a is as follows: 1. The global warming potential (GWP) of R134a is 1200 and R22 is 1700, both of which are greenhouse gases. 2. The Ozone Depleting Potential (ODP) of R134a is 0 and R22 is 0.06. This is the reason why R134a has become an environmentally friendly refrigerant. 3. The specific volume of R134a is 1.47 times that of R22, and the latent heat of evaporation is small, so the refrigeration capacity of R134a unit is only 60% of that of R22 unit. Based on the price per unit of cooling capacity, the price of the R22 unit is about 60% of that of the R134a unit. 4. The thermal conductivity of R134a is 10% lower than that of R22, so the heat exchange area of u200bu200bthe heat exchanger of the R134a unit needs to be larger. 5. The water absorption of R134a is very strong, which is 20 times that of R22, so the dryer in the unit system has higher requirements to avoid ice blocking. 6. R134a has a stronger swelling effect on rubber substances than R22, and the refrigerant leakage rate is higher in actual operation. In addition, it is highly corrosive to copper, and 'copper plating' occurs during use, so additives must be added to the system. 7. The R134a system requires a dedicated compressor and a dedicated grease lubricant. Due to its high water absorption, high foaming and high diffusibility, the stability of the system performance is inferior to that of the R22 system. mineral oil. 8. The price of R134a and other HFCs refrigerants and their special lipid oils is higher than R22, and the operation and maintenance costs of the equipment are higher. In summary, if R is not restricted by international conventions, large-scale flake ice machines should choose R22 refrigerant, which is cheaper, better in performance, and more cost-effective.
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