What is the result of a dirty condenser when paired with a propeller fan?

A dirty condenser can significantly impact the efficiency of the heat exchange process, particularly when paired with a propeller fan. When the condenser is dirty, it creates resistance to airflow. This resistance hinders the effective transfer of heat from the refrigerant to the ambient air, which causes the fan to work harder to maintain airflow through the condenser coils.

As a result of the increased airflow resistance due to dirt and debris accumulation, static pressure in the condenser unit actually increases. The dirt obstructs the airflow path, causing the fan to generate higher pressure in an attempt to push air through the condenser fins. This increase in static pressure signifies that the system is facing additional challenges in moving air, which compromises the overall effectiveness of the condenser and may lead to higher discharge temperatures of the refrigerant.

The other options do not accurately represent the dynamics of a dirty condenser with a propeller fan, as they fail to consider the increased resistance caused by dirt buildup and its effect on airflow and pressure within the system. The important takeaway is that maintaining the cleanliness of the condenser is crucial for optimal system performance and efficiency.