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.