Wind energy

WIND ENERGY

By- RAKESH KUMARBE/15082/12

SHUBHAM KUMARBE/15090/12

WIND IN ACTION: When wind strikes an object, it exerts a force in an attempt to move it out of the way. Some of the wind energy is transferred to the object, in this case the wind mill causing it to move.

WIND TODAY:• windmills are used for pumping

water from deep underground• Modern wind turbine is the

result of design & material advances made during 1980s0& 1990s, which enabled wind turbines to become increasingly efficient.• Today, wind turbines of same

size as the traditional European windmills can generate 250-300 kW of power.

History of wind usage:o one of the earliest energy resource.o Windmills have been in use since 2000BC & were

first developed in China & Persia.o Recorded in history, first to power boats & grind

grain, later to pump water, press oil, saw lumber & make paper.

o Egyptians may have been the first to go up the Nile river around 4th century BC , powered by wind.

o Windmills were introduced to Europe by the crusaders around 1300 AD.

o Ancient Chinese used vertical axis windmills to grind grain and pump water.

WIND ENERGY:the terms “WIND ENERGY” or “WIND POWER” describe the process by which the wind is used to generate mechanical power or electricity.

HORIZONTAL AXIS VERTICAL AXIS

HOW DO WE CONVERT WIND INTO 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 , pumping water)or a GENERATOR convertsthis mechanical power into ELECTRICITY.

The energy in the wind turns two or threePropeller like blades around a rotor. The rotor Is connected to the main shaft , which spins a Generator to create electricity.Wind turbines are mounted on a tower to cap-ture the most of energy . At 100 feet or more Above ground they can take advantage ofFaster and less turbulent wind.

Total wind energy flowing through an imaginary area AE=1/2 Atv³

and, P=1/2 A³

P α v³Wind power in an open air stream is thus

proportional to the third power of the wind speed;the available power increases eightfold when the wind speed doubles.

A WIND TURBINE

TURBINE COMPONENTS:

BLADE or ROTOR A DRIVE TRAIN A TOWER OTHER EQUIPMENTS INCLUDING CONTROLS,ELECTRICAL CABLES, GROUND SUPPORT EQUIPMENT, INTERCONNECTION EQUIPMENT

2.ROTOR

3.PITCH

1.BLADE7.GENERATOR

15.TOWER

SPECIFIC COMPONENTS: description:2.Is the ROTOR,1.BLADE convert the energy in the wind to rotational shaft energy.4.Is the BRAKE. It is very important to have a Brake in wind turbine , if something is wrong or it is going to fast , then it will brake & stop the wind turbine.5. Is LOW SPEED SHAFT , it goes into a big cog wheel & this goes into a smaller cog wheel. The small cog wheel rotates faster than big cog wheel.7. Is GENERATOR13. Is YAW MOTOR, it makes the wind turbine rotate in the wind direction.15. Is the TOWER, it supports the rotor & drive train.

JAISALMER WIND PARKINDIA’S LARGEST OPERATIONAL ONSHORE WIND FARM

ONSHORE WIND FARM

Advantages: a regular onshore turbine lasts for

around 20 years. Normally it takes 2-3 months before

the wind turbine has paid itself back. This also includes the energy , which were used to produce, install, maintain & remove the wind turbine.

Cheaper foundation Cheaper integration with electrical-

grid network.

Disadvantages: Wind turbines are noisy each one can generate same level of noise as a family car travelling 70 mph some people thinks that the large towers of wind turbines destroys the view of the landscape.

ONSHORE WIND FARMS

OFFSHORE WIND FARM

Advantages: An offshore wind turbine is

stronger than an onshore turbine . It lasts around

25-30 years, & produces about 50% more energy than onshore turbine. when a strong wind blows, it

produces around 3-5 MW per hour.

Disadvantages: More expensive to built More difficult to maintain and access.

OFFSHORE WIND FARMS

LONDON ARRAY

LARGEST OFFSHORE WIND FARM IN THE WORLD

ELECTRICITY GENERATION FROM WIND

ADVANTAGES & DISADVANTAGES OFWIND GENERATED ELECTRICITY

FREE, RENEWABLE RESOURCE SOURCE OF CLEAN, NON-POLLUTING

ELECTRICITY COST ISSUE ENVIRONMENTAL CONCERN

Noise produced by rotor/blade Aesthetic impact Avian/bat mortality

SUPPLY & TRANSPORT ISSUE

• If wind generating systems are compared with fossil fuelled systems on a life cycle basis ,wind costs are much more competitive with other generating technologies.

• The major challenge to using wind as a source of power is that it is intermittent and does not always blow when electricity is needed.

• Wind cannot be stored.• Good wind sites are often located in remote locations , far from areas of electric power demand.• wind resource development may compete with other uses for the land and those “alternative uses”

may be more highly valued than electricity generation. However ,wind turbines can be located on land that is also used for grazing or even farming.

• Wind power plants have relatively little impact on the environment compared to fossil fuel power plants.

the U.S. currently has 61,110 MW of installed wind project capacity, comprising 5.7% of total U.S. installed electric generating capacity.

Wind power is currently the fastest growing source of electricity production in the world.

A single wind turbine can power 500 homes. Wind power uses virtually no water, unlike other. At times, wind power produces as much as 45% of the

electricity in Spain.

INTERESTING WIND ENERGY FACTS

THANK YOU

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