Mainly two types of centrifugal fans

A centrifugal fan, also known as a radial fan or blower, is a mechanical device used to move air or gas in various industrial and commercial applications. It operates by generating a pressure difference, which causes air to flow from the fan's inlet to its outlet.

The design of a centrifugal fan includes a rotating impeller, which consists of several blades or vanes arranged in a radial pattern. When the impeller rotates, it draws air into the fan housing through the inlet. The rotating motion imparts kinetic energy to the air, which causes it to move outward in a radial direction, perpendicular to the axis of rotation.

There are mainly two types of centrifugal fans:

1. Forward-curved: In these fans, the blades curve in the direction of the fan's rotation. They are often used in applications requiring low to moderate airflow with relatively high pressures. They are more suitable for clean air and have limited tolerance for dust and debris.

2. Backward-curved: These fans have blades that curve against the direction of rotation. They are more efficient and can handle higher airflow rates with lower pressure build-up. They are also more tolerant of dust and particulate-laden air, making them suitable for various industrial applications.

Centrifugal fans are employed in a wide range of industries, including ventilation systems for buildings, HVAC (Heating, Ventilation, and Air Conditioning) systems, industrial processes, dust collection systems, pneumatic conveying, and more. They are often used in situations where high-pressure airflow is required, such as in ducted systems or applications with resistance to airflow, like air filters or heat exchangers.

The performance of a centrifugal fan is influenced by factors like the impeller design, rotational speed, and system pressure requirements. Proper selection and maintenance of these fans are essential to ensure optimal efficiency and reliability in their respective applications.