M.S.Ramaiah School of Advanced Studies 1

Wind Energy Harvesting

Manasa.K CWB0912002-FT2012

M. Sc. (Engg.) in Electronic System Design Engineering

Module Leader: Mr . Ugra Mohan Roy

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Contents

• Introduction

• History

• Gearless BTPS

• BPTS Design

• BPTS description

• Technical Specifications

• Conclusion

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Introduction

• The terms "wind energy" or "wind power" describe the process

by which the wind is used to generate mechanical power or

electricity.

• Wind turbines convert the kinetic energy in the wind into

mechanical power.

• This mechanical power can be used

for specific tasks (such as grinding grain

or pumping water) or a generator can

convert this mechanical power into

electricity to power homes, businesses,

schools etc.

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History

Tower mill

Smock mill Sails

Wind Pumps

Wind Turbine

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Gearless Blade Tip Power System

• Blade Tip Power System (BTPS) replaces the traditional gear box, shaft

and generator of current wind turbine technology.

• The gearless Blade Tip System creates a “free wheeling’’ turbine,

generating energy from the blade tips (where the speed lies) rather than

through a mechanical centre gear.

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BTPS Design

the generator by swiftly passing the blade tip magnets through the copper coil banks

mounted onto the enclosed perimeter frame.

• The Blade Tip Power System addresses past constraints such as size, noise,

vibration and output.

• It utilizes a system of magnets and stators

surrounding its outer ring.

• Captures power at the blade tips where speed is

greatest, practically eliminating mechanical

resistance and drag.

• Rather than forcing the available wind to turn a

generator, the perimeter power system becomes

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Description

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Description

• This design using BTPS allows kinetic energy to be harnessed from a smaller,

more economical swept rotor area, to pass it’s magnets at as high a rate of

speed, it has similar generating capacity as the traditional turbines. Advantage

of this is, it can be operated in any wind speed.

• The electricity is generated through stator technology using the patented BTPS

at the outer perimeter of the wheel, where the speed lies. Speed travelled at the

outer perimeter of the circumference is 9 times greater than the feet per second

speed at the centre shaft, thereby eliminating the need for a traditional gear

drive to induce higher revolutions per minute at a generator. This reduces the

manufacturing cost.

• The different rotor design, a free spinning wheel, does not experience those

excessive harmonic vibrations.

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Technical Specifications

• Wind turbine is a gearless wind turbine that measures just 6 feet (1.8 m) in

diameter.

• Weighs 241 lbs (110 kgs), Directional Fins: 16 lb. (7.3 kg) and produces up to

1500 kWh’s per year depending on height and location.

• Made of polycarbonate, aluminum and steel. Blades: 20 Glass Filled Nylon (10

short and 10 long)

• Sound Power Level: At 10 ft. (3 m) away, less than 35 dB at 30 mph (13.4 m/s)

• Temperature - Operating, Storage and Transportation:-40 C to 60 C(-40 F to 140 F)

• Wind Turbine’s BTPS perimeter power system and unique design of multi-stage

blades allows the system to react quickly to changes in wind speed.

• This ensures that the maximum wind energy is captured without the typical noise

and vibration associated with traditional wind turbines.

• Wind turbine has an increased operating span over traditional turbines with a start-

up speed as low as 0.5 mph (0.2 m/s), cut in at 3 mph (1.34 m/s), with an auto shut

off at 38 mph (17.0 m/s), traditional gearbox turbines require minimum wind

speeds of 7.5 mph (3.5 m/s) to cut in and start generating power.

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Conclusion

• Wind energy harvesting is one of the fastest growing sources of electricity

and one of the fastest growing markets in the world today.

• Some of the benefits associated with wind energy harvesting:

Green Power: The electricity produced from wind power is said to be

"clean" because its production produces no pollution or greenhouse

gases.

Sustainable: Wind is a renewable energy resource, it is inexhaustible

and requires no "fuel" besides the wind that blows across the earth.

Affordable: Wind power is a cost-competitive source of electricity,

largely due to technological advancements.

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References

• S. Clarke – Engineer Rural Environment/OMAFRA (September 2003) Electricity

Generation Using Small Wind Turbines at Your Home or Farm [Online] available

from< http://www.omafra.gov.on.ca/english/engineer/facts/03-047.htm > [Sep

2003]

• WindTronics Honeywell-The WindTronics Wind Turbine – Model BTPS6500

[Online] available from < http://www.windtronics.com > [n.d]

• POPSIC- The future now A personal turbine makes your rooftop into a wind

farm[online] available from < http://www.popsci.com/gadgets/article/2011-

09/personal-turbine-makes-your-rooftop-wind-farm >[n.d]

• Ugra Mohan Roy (2012) Wind Energy Harvesting, from ESE2513,4th Session

Large area Electronics, M.S Ramaiah School of Advanced Studies (MSRSAS)

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Thank You