What refrigerant is commonly used as a replacement for R-11?

What refrigerant is commonly used as a replacement for R-11?

• A. R-134a
• B. R-123
• C. HCs
• D. R-500

Answer: (B)

The commonly used replacement for R-11 is R-123. R-11, which is a chlorofluorocarbon (CFC), has been phased out due to its detrimental effect on the ozone layer. R-123, on the other hand, is a hydrobromofluorocarbon (HBFC) that has a lower ozone depletion potential and is more environmentally friendly. It is specifically designed for use in chillers and air conditioning applications that originally utilized R-11, making it a suitable drop-in replacement in many cases. R-134a, although a replacement for other refrigerants, is primarily used as a substitute for R-12 and is not suitable for replacing R-11. Hydrocarbons (HCs) are generally not direct substitutes for R-11 due to their different thermodynamic properties and flammability concerns. R-500, which is a blend of R-12 and R-152a, is also not a direct substitute for R-11, as it has different characteristics and environmental profiles. Thus, R-123 is the correct answer as it effectively serves as a replacement for R-11 in applicable systems.

The commonly used replacement for R-11 is R-123. R-11, which is a chlorofluorocarbon (CFC), has been phased out due to its detrimental effect on the ozone layer. R-123, on the other hand, is a hydrobromofluorocarbon (HBFC) that has a lower ozone depletion potential and is more environmentally friendly. It is specifically designed for use in chillers and air conditioning applications that originally utilized R-11, making it a suitable drop-in replacement in many cases.

R-134a, although a replacement for other refrigerants, is primarily used as a substitute for R-12 and is not suitable for replacing R-11. Hydrocarbons (HCs) are generally not direct substitutes for R-11 due to their different thermodynamic properties and flammability concerns. R-500, which is a blend of R-12 and R-152a, is also not a direct substitute for R-11, as it has different characteristics and environmental profiles. Thus, R-123 is the correct answer as it effectively serves as a replacement for R-11 in applicable systems.