Selection of the right refrigerant
When designing a refrigeration system, there are several refrigerants that can be chosen, such as chlorofluorocarbons (CFCs), ammonia, hydrocarbons (propane, ethane, ethylene, etc.), carbon dioxide, air (in the air conditioning of aircraft) and even water (in applications above the freezing point). A proper choice of coolant depends on the specific situation. Of these, refrigerants such as R-11, R-12, R-22, R-134a, and R-502 cover 90% of the market in the United States.
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