Identify a low-GWP non-flammable refrigerant used in some stationary systems and its approximate GWP.

Identify a low-GWP non-flammable refrigerant used in some stationary systems and its approximate GWP.

• A. R-1234yf; GWP around 4
• B. R-717; GWP around 0
• C. R-1234ze (HFO-ze); GWP around 6
• D. R-32; GWP around 675

Answer: (C)

The idea is to find a refrigerant that keeps climate impact very low while staying non-flammable for safe use in stationary equipment. R-1234ze fits this well: it’s a hydrofluoroolefin with a GWP of about 6, which is far lower than traditional HFCs, and it is classified as non-flammable (A1). This combination makes it a practical low-GWP option for some stationary systems, offering safer handling compared with flammable alternatives. In contrast, R-1234yf has an even lower GWP (around 4) but is flammable, so it isn’t non-flammable. R-32 has a much higher GWP (about 675) and is also flammable, making it unsuitable when non-flammability is a priority. Ammonia (R-717) has essentially zero GWP but is highly toxic, which limits its use in many stationary applications. So the best match for a low-GWP, non-flammable refrigerant used in some stationary systems is R-1234ze, with a GWP around 6.

The idea is to find a refrigerant that keeps climate impact very low while staying non-flammable for safe use in stationary equipment. R-1234ze fits this well: it’s a hydrofluoroolefin with a GWP of about 6, which is far lower than traditional HFCs, and it is classified as non-flammable (A1). This combination makes it a practical low-GWP option for some stationary systems, offering safer handling compared with flammable alternatives. In contrast, R-1234yf has an even lower GWP (around 4) but is flammable, so it isn’t non-flammable. R-32 has a much higher GWP (about 675) and is also flammable, making it unsuitable when non-flammability is a priority. Ammonia (R-717) has essentially zero GWP but is highly toxic, which limits its use in many stationary applications. So the best match for a low-GWP, non-flammable refrigerant used in some stationary systems is R-1234ze, with a GWP around 6.