Differences in the Operation of Forced-Draft Evaporators with Turbine and Axial Fan

When choosing a refrigeration system, it is crucial to consider the appropriate type of ventilation, as it plays a key role in optimizing performance and energy efficiency. Two of the most common options for installing a forced-draft evaporator are axial fans or centrifugal fans (turbines). Each offers unique advantages depending on the application and specific environmental conditions.

Key Differences

1. Evaporators with Axial Fans:

Axial fans can move a large volume of air per watt of energy consumed, making them highly energy-efficient.
They are ideal for systems with low pressure loss, as they project air at a relatively low velocity, perfect for open areas with uniform air distribution.
Their efficiency allows for significant energy savings in refrigeration environments with simpler airflow requirements.

2. Evaporators with Centrifugal Fans (Turbines):

Turbines are powerful and designed to overcome airflow resistance, making them the preferred option when high-velocity air projection is needed, known as the “arrow effect.”
They consume more energy per unit of airflow than axial fans, but their ability to overcome obstacles and maintain consistent airflow to distant areas is unmatched.
They are perfect for refrigerated counters where it is essential to ensure that cold air reaches even the farthest sections evenly.

Evaporador con ventilador axial — **Evaporator with Axial Fans**

Evaporador con turbina — **Evaporator with Axial Fans**

Advantages and Use Cases

Axial Fans
The best option when energy efficiency is a priority in applications with low airflow restrictions. For example, in large cold rooms with free circulation.
Centrifugal Fans (Turbines)
Indispensable when the refrigeration space is obstructed by products or when directed airflow is needed over long distances, such as in refrigerated display cases with high merchandise density.

Different types of fans are available, and the choice between an axial fan and a turbine largely depends on your system’s specific configuration and the cooling requirements of the environment. Both have unique applications and advantages that can enhance system performance when used correctly.