Wind energy

Wind energy

WIND ENERGY

PRESENTED BY:Mr.Burungale Dhanaji Shivaji.

INTRODUCTION

WIND ENERGY Wind energy is a converted form of solar

energy. The sun's radiation heats different parts of

the earth at different rates-most notably during the day and night, but also when different surfaces (for example, water and land) absorb or reflect at different rates.

This in turn causes portions of the atmosphere to warm differently.

Hot air rises, reducing the atmospheric pressure at the earth's surface, and cooler air is drawn in to replace it.

The result is wind.

WIND TURBINES• Wind turbines are a rotating machine that will spin

and convert kinetic energy from the rotation in the wind into mechanical energy or electricity to use to power your house or anything else.

• There are various type of wind turbines these days. 

• If they power machines directly such as a well pump then they are considered wind mills.

• If the energy produced is instead converted to electricity then the source is considered a wind turbine or wind generator. 

• Wind Turbines have subcategories like  Horizontal Wind Turbines Vertical Axis Wind Turbines 

HORIZONTAL AXIS WIND TURBINE HAWT have the main rotor shaft and

electrical generator at the top of a tower must be pointed into the wind. Small turbines are pointed by a simple wind

vane, while large turbines generally use a wind sensor coupled with a servo motor.

HORIZONTAL-AXIS WIND TURBINES

Small (<10 kW)• Homes• Farms• Remote Applications

(e.g., water pumping, Telecom sites, ice making)

Large (250 kW-2+ MW)• Central Station Wind Farms• Distributed Power• Schools

Intermediate(10-250 kW)• Village Power• Hybrid Systems• Distributed

Power

VERTICAL-AXIS WIND TURBINES Vertical-axis wind turbines (VAWT) use rotors

that run vertically. Three well-known types of VAWTs are the1. Darrieus Wind Turbine - a model that

collects wind in cups dragging a turbine around, and that looks much like a 'giant eggbeater

2. Giromill Wind Turbine - a subtype of Darrieus turbine with straight, as opposed to curved, blades.

3. Savonius Wind Turbine  - a dragtype devise consisting of two or three scoops causing a turbine to spin,

VERTICAL-AXIS TURBINES

Advantages

Omni-directional accepts wind from any

direction Components can be

mounted at ground level ease of service lighter weight towers

Can theoretically use less materials to capture the same amount of wind

Disadvantages

Rotors generally near ground where wind is poorer

Centrifugal force stresses blades

Poor self-starting capabilities Requires support at top of

turbine rotor Requires entire rotor to be

removed to replace bearings Overall poor performance and

reliability

HOW DO YOU 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 or pumping water) or a generator can convert this mechanical power

wind turbine works the opposite of a fan. Instead of using electricity to make wind, like

a fan, wind turbines use wind to make electricity. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity.

HOW THE DOES A WIND TURBINE WORKS?

Wind turbines operate on a simple principle:The energy in the wind turns the propeller-like blades around a rotor. The pitch of the blades makes optimum use of the wind direction.The rotor is connected to the main drive shaft, which spins a generator to create electricity.Wind turbines are mounted on a tower to capture the most energy. At 30 metres or more above ground, they can take advantage of faster and less turbulent wind.Wind turbines can be used to produce electricity for a single home or building, or they can be connected to an electricity grid for more widespread electricity distribution.

WIND POWER GENERATION IN INDIA STATE POWER (MW)Andra Pradesh 2000Gujrat 3100Karnatak 4120Kerala 1380Madhya Pradesh 1920Orrisa 840Rajasthan 1210Tamil Nadu 1900West Bengal 1180Other State 2150TOTAL 20000

LARGE WIND TURBINES Common Utility-Scale Turbines

• 328’ base to blade• Each blade is 112’• 200 tons total• Foundation 20’ deep• Rated at 1.5-2

megawatts• Supply about 500

homes

GENERAL ADVANTAGES

Wind energy is friendly to the surrounding environment, as no fossil fuels are burnt to generate electricity from wind energy

Wind turbines requires less space than average power stations.

When combined with solar electricity, this energy source is great for developed and developing countries to provide a steady, reliable supply of electricityLowest prices renewable resourcesDon’t produce atmospheric emissions that cause acid rains and green house effects

GENERAL DISADVANTAGES The main disadvantage regarding wind power is

down to the winds unreliability factor. In many areas, the winds strength is not enough to support a wind turbine

Wind turbines generally produce allot less electricity than the average fossil fuelled power station, which means that multiple wind turbines are needed to make an impact.

Jaisalmer wind farm [The 2 largest off shore wind farm in the world]

London Array[Worlds largest on shore wind farm]

Thank you