Which refrigerant has a Global Warming Potential (GWP) of 1?

• A. R-134A
• B. R-123
• C. R-1233zd
• D. R-410A

Answer: (C)

The refrigerant with a Global Warming Potential (GWP) of 1 is R-1233zd. GWP is a metric that measures how much a substance contributes to global warming over a specific time period, typically 100 years, compared to carbon dioxide, which has a GWP of 1.

R-1233zd is recognized for its low environmental impact, making it suitable for applications where minimizing greenhouse gas emissions is crucial. This characteristic enhances its appeal in environmentally conscious HVAC and refrigeration systems.

The other refrigerants listed have significantly higher GWPs, indicating their greater potential for contributing to global warming compared to carbon dioxide. R-134A, for instance, is commonly associated with a GWP of around 1,430, which is much higher than R-1233zd. Similarly, R-123 and R-410A also have GWPs considerably over 1, positioning them higher on the scale of environmental impact relative to R-1233zd. Thus, the emphasis on R-1233zd aligns with global efforts to reduce greenhouse gas emissions and combat climate change.