Which of the following is an example of a non-condensable?

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Multiple Choice

Which of the following is an example of a non-condensable?

Non-condensable gases are gases that do not condense into a liquid at the condenser’s operating pressure and temperature. They stay as gas and interfere with heat transfer, typically raising head pressure and reducing system efficiency. Air is a common non-condensable that can enter a system through leaks and become trapped in the condenser side. Moisture is water vapor that will condense into liquid and is removed by dehydration/purging, so it’s not a non-condensable. The listed refrigerants are designed to condense to liquid in the cycle, so they are condensables. Therefore, air is the non-condensable.

Non-condensable gases are gases that do not condense into a liquid at the condenser’s operating pressure and temperature. They stay as gas and interfere with heat transfer, typically raising head pressure and reducing system efficiency. Air is a common non-condensable that can enter a system through leaks and become trapped in the condenser side. Moisture is water vapor that will condense into liquid and is removed by dehydration/purging, so it’s not a non-condensable. The listed refrigerants are designed to condense to liquid in the cycle, so they are condensables. Therefore, air is the non-condensable.

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