A centrifugal fan is among the most energy-efficient fans available today. Most people consider a centrifugal fan to be nothing more than a fan; its complexities are not widely known. These fans push air outward through ducts or tubes, providing a stronger and more consistent airflow than axial fans. A centrifugal fan is commonly used in domestic applications to move air through a duct. For example, consider your air conditioner, furnace, or stove hood duct. Centrifugal fans are into four categories, each with a distinct purpose.
1. Radial
These are medium-flowing high-pressure fans. Radial-bladed fans are ideal for dusty industrial applications or settings with gas or moisture in the air. The blower fan can transport both granular and stringy materials. These fans are normally composed of the heavy-gauge plate and have six or eight blades. They generate pressure at high tip speeds and can sustain more vibration, unbalanced forces, and impact than conventional fans.
2. Backward Curve
These are fans with high pressure, high flow, and great efficiency. Power decreases as flow increases over the most efficient section of the system. Although the BC wheel is for clean air applications, it frequently meets light dust in the airstream. It has curved intake cones and side rims on the wheel to control airflow through the wheel more precisely. These characteristics also lead to extremely efficient air movement. The BC is the most susceptible to installation conditions of the three types.
3. Forward Curve
These are medium-pressure, high-flow fans that you can utilize for clean air, ventilation, and exhaust. These blower fans have a lot of blades with a lot of curvatures and a short chord length. As a result, the air coming off the blades has a relatively high forward velocity vector. As a result, the fan speed is low.
4. Airfoil
These are the most efficient fans and work best in pure air situations. The efficiency of a centrifugal fan can depend on the type of fan blade it has. In this case, the airfoil is the best and most efficient.
Aerofoil designs give maximum efficiency (up to 10% greater than rearward curved blades) among centrifugal fan designs. However, its use only goes up to clean, dust-free air. In addition, axial-flow fans produce less pressure than centrifugal fans. They also demonstrate a pressure drop before reaching peak pressure.
Centrifugal fans are among the most efficient and adaptable types of air-moving equipment. Therefore, you need to be careful when choosing one. To select the proper fan, you must first determine how much pressure you need to achieve the specified airflow through the ducting and any filters, dampers, or other obstructions in your ventilation system. For example, you’ll require much more power if you have a long, intricate duct system.
