What is the function of a condenser in an air conditioning system?

• A. To increase refrigerant pressure
• B. To remove the superheat and condense vapour
• C. To circulate air through the system
• D. To dehumidify the air

Answer: (B)

The function of a condenser in an air conditioning system is primarily to remove the superheat from the refrigerant and condense the vapor into a liquid form. This process occurs after the refrigerant has absorbed heat from the indoor environment and has become a high-pressure vapor. When this vapor enters the condenser, it releases the absorbed heat to the outdoor air or a water source, leading to a decrease in temperature.

As the refrigerant cools down, it undergoes a phase change from vapor to liquid, removing any superheat in the process. This is essential for the efficient operation of the refrigeration cycle, as the refrigerant must be in a liquid state to return to the expansion valve and continue circulating through the system.

Other options describe functions associated with different components or processes within the air conditioning system. For example, while increasing refrigerant pressure is part of the compressor's role, the condenser's task is focused on heat rejection and phase change. Similarly, circulating air is a function of the fan and ductwork, while dehumidification involves moisture removal primarily through the evaporator coil rather than the condenser itself. Understanding these roles clarifies the specific function of the condenser within the system.