In an air cooled condenser, the refrigerant normally condenses at approximately what temperature above the air?

In an air-cooled condenser, the refrigerant typically condenses at a temperature that is significantly influenced by the ambient air temperature. The correct choice indicates that the refrigerant usually condenses at approximately 30°F above the temperature of the air. This temperature differential ensures that the refrigerant can efficiently transfer heat from inside the refrigeration system to the surrounding air, allowing for proper condensation.

The 30°F above the air temperature is a practical design consideration that takes into account various factors such as efficiency, ambient conditions, and heat exchange effectiveness. This differential allows for adequate heat removal, as the condenser relies on the airflow across its coils to cool and condense the refrigerant effectively.

Other potential choices represent either insufficient heat transfer or overly excessive temperature rises that could lead to inefficiencies or even failure of the condenser to function properly under typical operating conditions. The choice of 30°F strikes a balance that is commonly accepted in commercial refrigeration applications.