At normal room temperatures, what is the pressure of a storage cylinder of recovered R22?

At normal room temperatures, what is the pressure of a storage cylinder of recovered R22?

• A. 250 psig
• B. 200 psig
• C. 175 psig
• D. 130 psig

Answer: (D)

In the context of refrigerants such as R22, the pressure inside a storage cylinder at normal room temperatures typically corresponds to the saturation pressure of the refrigerant at those temperatures. R22, known as hydrochlorofluorocarbon (HCFC), has specific saturation pressure characteristics. At approximately room temperature, generally around 70°F (21°C), the saturation pressure of R22 is about 130 psig. This means that at this temperature, the refrigerant in the cylinder achieves a balance between evaporation and condensation, maintaining this pressure. Understanding the relationship between temperature and pressure is essential in HVAC applications for ensuring the safe and efficient handling of refrigerants. Therefore, recognizing that the pressure of R22 at normal conditions aligns with the saturation point at those temperatures justifies why 130 psig is the correct answer.

In the context of refrigerants such as R22, the pressure inside a storage cylinder at normal room temperatures typically corresponds to the saturation pressure of the refrigerant at those temperatures. R22, known as hydrochlorofluorocarbon (HCFC), has specific saturation pressure characteristics.

At approximately room temperature, generally around 70°F (21°C), the saturation pressure of R22 is about 130 psig. This means that at this temperature, the refrigerant in the cylinder achieves a balance between evaporation and condensation, maintaining this pressure.

Understanding the relationship between temperature and pressure is essential in HVAC applications for ensuring the safe and efficient handling of refrigerants. Therefore, recognizing that the pressure of R22 at normal conditions aligns with the saturation point at those temperatures justifies why 130 psig is the correct answer.