Forward Curved Vs Backward Curved Centrifugal Fan Efficiency

Motor selection must take this into account.

Forward curved vs backward curved centrifugal fan efficiency. The main objective of this paper is to show comparison of backward curved impeller with backward inclined airofoil of centrifugal fan. Such a fan is also called a blower fan biscuit blower citation needed or squirrel cage fan because it looks like a hamster wheel. Forward curved fan. Forward curved vs backward curved centrifugal fans the centrifugal fan manufacturing companies have been investing in research a development to improve the efficiency of fans.

Power rises continually toward free delivery. The produced static pressure and air volume at best. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink. Do not rate fan in the pressure curve dip to the left of peak pressure.

The reasoning behind this fact follows. Do not rate fan in the pressure curve dip to the left of peak pressure. As with the backward curved centrifugal fan the suction side of the impeller blade draws air from the centre of the fan which results in a directional change of the airflow between the inlet and the exhaust of 90 o. There are myriad types of blades that can be used in centrifugal fans and it ll be up to you to pick the one that fits your needs best.

The optimum operating area for a forward curved centrifugal fan is when it is operating at higher pressure. Pressure curve less steep than that of backward curved. Backward curved centrifugal fans. Spasić published centrifugal fans with backward curved and forward curved blades find read and cite all the research you need on researchgate.

All centrifugal fans are not created equal. A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. The non overloading characteristic the ability to install the fan with or without a scroll and an impeller design that offers the highest static efficiency of all types of fans means that the backward curved fan is a flexible adaptable fan design can be used across a wide range of installations. Posted june 13 2019 by brian.

Turns out that centrifugal pumps are always backward curved when used to pump water. This has been the main reason for remarkable improvements in this industry. Flatter pressure curve and lower efficiency than the airfoil backward curved and backward inclined. The best efficiency points at different speeds were obtained.

Flatter pressure curve and lower efficiency than the airfoil fan backward curved fan and backward inclined fan. Motor selection must take this into account.