Low Cost Windmill

Problem addressed:

Use of wind turbine is one of the oldest methods of harnessing energy from wind to pump water. However, majority of the windmills available in the market are Aerodynamic windmills. These types of windmills require high cut-in speed (minimum wind speed requires for starting, i.e. about 12 to 15 km/hr) and this is a major limitations for majority of the Indian geographical area except coastal area. It also requires high maintenance and very expensive also.

Technical Specifications:  

• The windmill structure is made from MS. The structure is divided into three main components viz; Base structure, intermediate structure and head assembly (Rotor, crank and tail assembly).
• For the conversion of rotary motion to reciprocating motion, crank and connecting rod mechanism is used. The crank mechanism with the rod, which in turn is connected to the cylinder at the bore.
• Turbine blades are made of lightweight material and are given the proper angle so that the higher wind power can be harnessed and thereby can pump the water from greater depth.
• Furling tail mechanism and manual brake system has been incorporated in the windmill to safe guard it against the high wind velocity. The tail is being offset to the central axis in proportion to the offset of the rotor from the same. The tail is mounted on the inclined shaft in such a way that it gets restored as the wind speed comes down.

• This is very useful for pumping water from the depth of about 50 feet. The water discharge capacity is about 1200 -1500 lit / hr at wind speed of 10–12 km/hr. The performance may decrease while lifting water from depth more than 50 ft.
• It can be fitted to a tube well or open well for light irrigation and potable water too.
• It is an environment friendly product with low initial cost and zero operating cost.