Local Government Engineering Department (LGED)

Introduction :

• Low cost

• Locally manufactured

• Minimal maintenance

• 20,000 of water per day at 4.0 m/s wind velocity

  Water Pumping Windmill, designed by LGED

• 10 m head

Technical Data : 

• Rotor dia 2.75m

• No of blades 24

• Starting wind speed 1.8 m/s

• Pump type semi rotor reciprocating suction pump

• Output 20,000 litters/day, 10m head at 4.0 m/s wind velocity

Uses of  Windpump :

• Villages

• Schools

• Rural Clinics

• Farms (irrigation & livestock)

• Small scale industries

• Nature/Wildlife reserves

• Land Drainage

• Salt Production

• Waste water treatment

• Aerations

Wind speed data for 1 year :

Basic concepts of windpump :

• Wind energy is converted into rotary mechanical motion of wind turbine

• Rotary motion of the wind turbine is converted into reciprocating motion

• The pump sucks water and delivers into storage tank

Different parts of a windpump system :

 

The Well The Wheel or Rotor The Transmission Linkages The Tail The Turbine The Pump The Pump Rod Assembly Bearings Tower Storage Tank
	Different Parts of Windpump System

Materials & Manufacture :

• Most of the materials is steel angle sections, steel plates, chains with sprocket, G.I. Sheet etc.

• Few ball bearings and guides are required

• Little machining is required

• Few turning ,boring ,drilling and welding

Installation and Maintenance :

• Total weight of machine including the tower is under 800 kg

• Easy and safe installation using chain pulley mechanism and sometimes using a winch

• Maintenance is limited to greasing the ball bearings once a year

• Touching up or repainting every few year

• Servicing of pump (change seals only) every few years

Advantages :

• Low cost

• Low maintenance cost

• No fuel cost

• Minimal maintenance

• No pollution

• Ergonomic design

Conclusion :