AXIAL FLOW FRP FANS

PARAMETERS

Capacity (No.of Fans)

1000

No.of Shifts  / day

2

Working days / Yr.

300

Land Area, m2

12000

Covered Area, m2

3000

MANPOWER

Managerial

2

Engineers

4

Supervisors

3

Skilled

10

Unskilled

25

RAW MATERIAL

Glassfibre Reinforcements, Synthetic Resins, Steel Items, Painting Material, Packing Material etc.

PLANT & MACHINERY

 

Hydraulic Press, Electric Oven, Cantilever Test Fixtures, Muffle Furrnace etc.

Axial flow fans are widely used in almost all the industries for various applications viz., cooling towers, air cooled heat exchangers, humidifiers, ventilation and exhaust.  A large population existing is of conventional metallic fans having old designs and low efficiencies. 

Introduction of fiberglass composite material and ease of processing helped designer of axial flow fans to adopt more efficient profiles with optimum distribution of fan blade chord and twist, which are difficult to generate  hollow in metals.  Owing to this fact hollow bladed FRP fans are being rapidly adopted for various applications. 

ADVANTAGES 

The major advantages of FRP fans over conventional metallic fans are summarized below:

  • Optimal aerodynamic design of fan blades            provide higher efficiency for specific 
         application.

  • Reduction in overall weight of fan assembly provides extended life of mechanical drive system.

  • Low power consumption resulting in appreciable energy savings as compared to conventional metallic fans.

  • Ease of handling and maintenance.

  • Optimal aerodynamic design results in reduced operational noise level.

  • Excellent corrosion and erosion resistance.

Process 

Fan assembly would consist of FRP fan blades alongwith metal hub (central portion holding the blades).  Metal hubs can be arranged from some vendor as per available designs/drawings.  FRP fan blades manufacturing can be phased out as moulding, curing, cutting, finishing and painting. 

Fan blades can be manufactured adopting three processes (depending on fan blade size/shape) described below:

1.  Contact Moulding

Glass reinforcement as well as suitable resin are applied  on two halves of mould manually in line with the pre-decided laying-up pattern.  Mould is then closed for curing at room temperature.     

2.  Resin Transfer Moulding

Pre- weighted glass reinforcement  alongwith suitable
     core are kept into mould cavity.  Mould is closed
     and resin is transferred under pressure into the
     mould. It is kept for curing at room temperature.

3.  Compressing Moulding

Pre-wetted glass reinforcement is kept into the
     mould cavity and compressed using hydraulic
     press. Heating should be provided to optimize the
     cycle time. Process is suitable for small and solid
     components.

 

 

 

 

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