Forward Curved Centrifugal Fan Efficiency

These fans are for low to medium static applications.

Forward curved centrifugal fan efficiency.

Forward curved centrifugal fans look more like hamster wheels and can create more air pressure. These centrifugal fans are ideal for those companies looking for fans that can deliver medium to high airflow in their facilities. Their characteristic features are a low noise level relatively small air flow with a high increase in static pressure and space saving application. The characteristic curve of three kinds of centrifugal fan is shown in figure 2 15.

Centrifugal fans are capable of generating relatively high pressures. Centrifugal fans with forward curved blades. Centrifugal fans with forward curved blades always require a spiral housing. Forward curved centrifugal fans.

Forward curve sometimes referred to as a squirrel cage fan forward curve fans are used in most residential and light commercial hvac equipment. Forward blade backward blade and radial blade. Figure 1 centrifugal fan figure 2 axial fan each fan system has different types of wheels or impeller types. As a resistance to flow is applied to the suction or exhaust side of the fan the volume flow rate will drop.

They utilize a much higher rpm than the rpm found in backward curved centrifugal fans but it s worth noting that they also usually have a lower efficiency. Because of this they tend to be noisier than axial fans and require more power to run. They are suitable for high pressure applications as compared with axial flow fans. When there is no pressure in the system the fan is blowing freely a forward curved centrifugal fan will produce the greatest volume flow.