What is backward curved centrifugal fan?
The name, ‘Centrifugal Fan’ is derived from the direction of flow and how the air exits the fan impeller radially from the outer circumference of the fan. A Backward curved centrifugal fan is characterised by its cylindrical shape, several large curved blades and a conical inlet nozzle.
How do radial fans work?
How does a Radial Fan Work? In radial fan, the air hits the fan wheel, turns at the right angle, and is accelerated by radial flat blades on the impeller. The accelerated air is discharged radially, thus, the name. The airflow is induced by the centrifugal force, which is produced in a rotating column.
What is the difference between axial fan and radial fan?
Axial fans create low-pressure air, as the design of such fans allows these devices to distribute air somewhat evenly in a defined area. Radial fans, conversely, generate high-pressure air. In other words, they’ll create a steady flow of air that can be used to target a concentrated area.
What are the three types of axial fan?
There are three basic types of axial fans: propeller, tubeaxial, and vaneaxial. Propeller fans are most commonly used for dilution ventilation or cooling. These fans are often mounted in a wall or ceiling. Common examples are your automobile radiator fan or a free standing room fan.
What is HVAC fan called?
There are basically four types of fan that are commonly used in the HVAC equipment. They are the propeller fan, centrifugal fan, vane-axial fan and tube-axial fan.
Why to choose a forward curved centrifugal fan?
When high pressures at relatively low volume flow , or high flow rates are needed when space is at a premium, a forward curved centrifugal fan can be the right choice. Used in a scroll housing, forward curved impellers provide an effective solution.
How does forward curved centrifugal fan work?
With a backward curved impeller, the air exits in a radial direction whereas with a forward curved the air exits tangentially from the circumference of the fan . A forward curved centrifugal fan is characterised by its cylindrical shape and lots of small blades on the circumference of the impeller.
What is centrifugal exhaust fan?
A centrifugal fan is a fan in which air flows in a radial — or perpendicular — direction relative to the fan shaft. This is in contrast to axial fans, the type commonly used for household cooling, in which air flows parallel to the fan shaft.