Which natural refrigerant is considered to be non-flammable?

Carbon Dioxide is considered to be a non-flammable natural refrigerant. This is an important characteristic because flammability in refrigerants can pose increased safety risks in case of leaks or during operation. Carbon Dioxide, with a high critical temperature and excellent thermodynamic properties, is often utilized in refrigeration systems with a low environmental impact since it has a very low global warming potential compared to many synthetic refrigerants.

In addition to its non-flammable nature, Carbon Dioxide is also a stable compound and does not contribute to ozone depletion. Its safety profile makes it a favorable choice in various applications where flammability is a concern.

Other refrigerants like ammonia, propane, and ethylene come with their own associated risks. Ammonia is toxic and can be a concern for safety, while propane is flammable and poses risks in different environments. Ethylene is also flammable and not recommended for many refrigeration applications due to its hazards. Thus, Carbon Dioxide stands out as a reliable and safe refrigerant option.