Types of Axial Flow Fans
Textile Humidification Fans
The axial flow fans are widely used for providing the required airflow for heat & mass transfer operations in various industrial equipment and processes. These include cooling towers for air-conditioning & ventilation, humidifiers in textile mills, air heat exchangers for various chemical processes, ventilation & exhaust as in mining industry etc. All the major industries of the national economy such as power generation, petroleum refining & petrochemicals, cement, chemicals & pharmaceuticals, fertilizer production, mining activities, textile mills, hotels etc. use large number of axial flow fans for the aforesaid operations.

The axial flow fans are conventionally designed with impellers made of aluminum or mild steel. The grey area today is the inconsistency in proper aerofoil selection & dimensional stability of the metallic impellers. This leads to high power consumption & high noise levels with lesser efficiency.

The leading fan manufacturers in the world have been looking at FRP axial flow fans for higher energy efficiency. The improved design of FRP fan is aimed at higher lift to drag ratio and thereby increasing the overall efficiency. The new & improved aerodynamic fan designing, composite development, structural design combined with latest manufacturing process are also expected to result in consistent quality and higher productivity.

The Fibre Reinforced Plastics (FRP) fans have the following advantages:

Higher efficiency suitable for any specific application
Reduced overall weight of the fan, thereby extending the life of mechanical drive systems such as motors, gearboxes, bearings etc.
Low power consumption resulting in appreciable energy savings as compared to existing metallic fans.
Lower flow noise and mechanical noise levels compared to the conventional metallic fans.
Longer life of fans due to improved mechanical strength.
Excellent corrosion & erosion resistance and fire retardance.
As the fan efficiency is defined as (Q x D Pt)/ (Shaft horsepower), thus with reduced shaft power requirement, there is a commensurate reduction in energy consumption.