Which statement about R-290 is true?

Which statement about R-290 is true?

• A. It is a refrigerant with high GWP.
• B. It is propane and has a very low GWP.
• C. It is a chlorine-containing CFC.
• D. It is a refrigerant used in halogenated systems widely.

Answer: (B)

R-290 is propane, a hydrocarbon refrigerant with a very low Global Warming Potential. Unlike many common refrigerants, it does not contain chlorine, so it isn’t a CFC and it won’t contribute to ozone depletion. Its GWP is about 3, which is much lower than many alternatives (for example, R-134a has a GWP over a thousand). Because it is flammable, handling and system design must follow safety guidelines and equipment rated for hydrocarbon refrigerants, with appropriate charge limits and ventilation. The statement that it is propane and has a very low GWP accurately captures its identity and environmental impact, making it the true option. The other choices mischaracterize R-290 as having high GWP, as a chlorine-containing CFC, or as being widely used in halogenated systems, all of which are not correct.

R-290 is propane, a hydrocarbon refrigerant with a very low Global Warming Potential. Unlike many common refrigerants, it does not contain chlorine, so it isn’t a CFC and it won’t contribute to ozone depletion. Its GWP is about 3, which is much lower than many alternatives (for example, R-134a has a GWP over a thousand). Because it is flammable, handling and system design must follow safety guidelines and equipment rated for hydrocarbon refrigerants, with appropriate charge limits and ventilation. The statement that it is propane and has a very low GWP accurately captures its identity and environmental impact, making it the true option. The other choices mischaracterize R-290 as having high GWP, as a chlorine-containing CFC, or as being widely used in halogenated systems, all of which are not correct.