AIRCOL
A radial fan is a type of fan that creates a pressure difference. The airflow in these fans works in a centrifugal direction, as a centrifugal force acts on the air. A centrifugal fan uses a rotating impeller inside a helical casing to move air or other gases. Air or gas enters along the axis of the fan and is moved tangentially around the impeller before being ejected out of the fan. Due to the high pressure they generate, centrifugal fans are ideal for high-pressure applications such as drying and air conditioning systems. These fans are also suitable for air pollution and filtration systems, as their enclosed moving parts reduce particle emissions.
Application Areas: For small and medium-sized spaces:
The required air changes depend on the room's use, the number of people and items in the room, and the activities taking place. The table below provides the required air changes for different environments.
Based on the activity in the living or working space, the required airflow can be calculated:
To calculate the required airflow:
After determining the required airflow, the duct design (considering noise and airspeed criteria) should be created, and pressure losses should be calculated. The fan type (axial, radial, roof, smoke evacuation, etc.) should be selected based on the environment, and the appropriate fan curve should be chosen according to the required flow rate and static pressure.
For example, in an office with 5 people, where the ceiling height is 2.6 meters and the floor area is 50 m², the room volume would be 130 m³. The air change rate for offices is 4-8, and if we take 5 as the rate, the airflow requirement would be 650 m³/h. For 5 people in normal activity, the airflow requirement would be 145 m³/h, leading to a total of 795 m³/h.
After calculating the required airflow, the installation location for the fan must be determined. The fan could be mounted on a ceiling, wall, duct, or ventilation pipe, and the electrical connection type (single-phase or three-phase) must also be considered depending on the setting (office, industrial, etc.).