Which type of fan is predominantly used in air-cooled condensing units?

Air-cooled condensing units primarily utilize axial fans due to their design and efficiency in moving large volumes of air. Axial fans work by drawing air in parallel to the fan's shaft, allowing them to create a significant airflow with relatively low power consumption. This characteristic makes them ideal for cooling applications, where the goal is to effectively dissipate heat from refrigerant in the condenser coil.

The prevalent use of axial fans in air-cooled condensing units stems from their ability to provide efficient airflow over the condenser coils, enhancing heat transfer and maintaining optimal operating conditions. Additionally, their design is relatively simple, which further reduces maintenance requirements and operational costs.

While centrifugal fans do push air vertically and are useful in some applications, they are typically used where high pressure is required rather than for general cooling purposes like in air-cooled condensing units. Draw-through propeller fans and cross-flow fans are less common in these contexts and do not match the performance characteristics needed for air-cooled condensing applications as effectively as axial fans do.