What is the Ozone Depletion Potential (ODP) of refrigerant R22?

• A. 0.01
• B. 0.005
• C. 1.0
• D. 0.1

Answer: (B)

The Ozone Depletion Potential (ODP) of refrigerant R22 is 0.05. This value indicates that R22 has a significant impact on ozone layer depletion, as it is a hydrochlorofluorocarbon (HCFC) which contains chlorine. The ODP scale is relative to a reference substance, usually CFC-11, which has an ODP of 1.0. A lower ODP value means less potential for ozone depletion compared to CFC-11.

In this context, R22's ODP of 0.05 signifies that it contributes to ozone depletion but at a reduced scale when compared to substances with an ODP of 1.0. Understanding the ODP of refrigerants like R22 is critical for compliance with environmental regulations aimed at protecting the ozone layer. Recognizing the environmental impact of different refrigerants helps in making informed decisions regarding their use and alternatives in refrigeration and air conditioning systems.