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13-10-2010, 01:42 PM
Post: #1


.ppt  a step towards wind energy.ppt (Size: 7.03 MB / Downloads: 947)




28-03-2011, 10:49 PM
Post: #2
i want seminar report on wind energy technology...can u plz help me...waiting for your response.........mail to karthik.in99[at]
14-04-2011, 11:05 AM
Post: #3
full report on WIND ENERGY
Submitted by
Sumit patel
Branch:- Electrical

.docx  wind energy.docx (Size: 383.36 KB / Downloads: 420) ABSTRACT

Differential heating of the earth’s surface and atmosphere induces vertical and horizontal air currents that are affected by the earth’s rotation and contours of the land cause the generation of wind energy, which is as an alternative to fossil fuels, is plentiful, renewable, widely distributed, clean, and produces no greenhouse gas emissions during operation and can be converted into a useful form of energy, such as using wind turbines to make electricity, wind mills for mechanical power, wind pumps for pumping water or drainage, or sails to propel ships. In a wind farm, individual turbines are interconnected with a medium voltage , power collection system and communications network. At a substation, this medium-voltage electric current is increased in voltage with a transformer for connection to the high voltageelectric power transmission system. Large-scale wind farms are connected to the electric power transmission network; smaller facilities are used to provide electricity to isolated locations. However, the construction of wind farms is not universally welcomed because of their visual impact but any effects on the environment are generally among the least problematic of any power source
18-05-2012, 10:58 AM
Post: #4
Interesting topic. I want to attend a seminar with this issue. I need to be more informed.
21-06-2012, 01:20 PM
Post: #5

Introduction to wind

What is wind?
Wind is simply air in motion. It is produced by the uneven heating of the Earth’s surface by energy from the sun. Since the Earth’s surface is made of different types of land and water, it absorbs the sun’s radiant energy at different rates. Much of this energy is converted into heat as it is absorbed by land areas, bodies of water, and the air over these formations.

All renewable energy (except tidal and geothermal power), ultimately comes from the sun

The earth receives 1.74 x 1017 watts of power (per hour) from the sun

About one or 2 percent of this energy is converted to wind energy (which is about 50-100 times more than the energy converted to biomass by all plants on earth

Differential heating of the earth’s surface and atmosphere induces vertical and horizontal air currents that are affected by the earth’s rotation and contours of the land WIND. ~ e.g.: Land Sea Breeze Cycle

Wind velocity - measurement

Wind speed can be measured with wind gauges and anemometers. One type of anemometer is a device with three arms that spin on top of a shaft. Each arm has a cup on its end. The cups catch the wind and spin the shaft. The harder the wind blows, the faster the shaft spins. A device inside counts the number of rotations per minute and converts that figure into miles per hour (mph). A display on the anemometer shows the speed of the wind.

Modern Wind Machines

1. The moving air spins the turbine blades.
2. The blades are connected to a low-speed shaft. When the blades spin, the shaft turns.
3. The low-speed shaft is connected to a gearbox. Inside, a large slow-moving gear turns a small gear quickly.
4. The small gear turns another shaft at high speed.
5. The high-speed shaft is connected to a generator. As the shaft turns the generator, it produces electricity.
6. The electric current is sent through cables down the turbine tower to a transformer that changes the voltage of the current before it is sent out on transmission lines.

HAWT advantages

The tall tower base allows access to stronger wind in sites with wind shear. In some wind shear sites, every ten meters up the wind speed can increase by 20% and the power output by 34%.
High efficiency, since the blades always move perpendicularly to the wind, receiving power through the whole rotation. In contrast, all vertical axis wind turbines, and most proposed airborne wind turbine designs, involve various types of reciprocating actions, requiring airfoil surfaces to backtrack against the wind for part of the cycle. Backtracking against the wind leads to inherently lower efficiency.

VAWT advantages

No yaw mechanisms is needed.
A VAWT can be located nearer the ground, making it easier to maintain the moving parts.
VAWTs have lower wind startup speeds than the typical the HAWTs.
VAWTs may be built at locations where taller structures are prohibited.
VAWTs situated close to the ground can take advantage of locations where rooftops, mesas, hilltops, ridgelines, and passes funnel the wind and increase wind velocity.

Darrieus type rotor

Darrieus wind turbines are commonly called "Eggbeater" turbines, because they look like a giant eggbeater. They have good efficiency, but produce large torque ripple and cyclic stress on the tower, which contributes to poor reliability. Also, they generally require some external power source, or an additional Savonius rotor, to start turning, because the starting torque is very low. The torque ripple is reduced by using three or more blades which results in a higher solidity for the rotor. Solidity is measured by blade area over the rotor area.

Attached File(s)
.pptx  Wind Energy_Part 1.pptx (Size: 3.21 MB / Downloads: 228)
28-09-2012, 01:22 PM
Post: #6

.ppt  WIND ENERGY.ppt (Size: 4.02 MB / Downloads: 342)


Wind is air in motion.
Is the result of the conversion of the potential energy of the atmosphere into kinetic energy due to pressure differential.
Most prominent feature of climatology in INDIA is the monsoon circulation.


Installation in shallow water few kilometers from the seashore.
The key feature for off-shore is high reliability of wind.
In innovative move, turbines are placed on floating platforms and anchored to the sea bottom.


Up to 10% is the short term goal for many countries.
Germany in particular, several power utilities are expecting future wind contribution as high as 30%.
Uncertainty of wind constitutes a challenge to achieve a much higher degree of grid penetration.
Work is on for wind models for predicting the power for next 24 to 48 hours

….Current Research Areas

Stand alone and non-grid WECS
Wind – Solar conversion systems for different applications
VAWT – aerodynamic studies of various configurations
Offshore – foundation, cable & peculiar issues of marine operation
Human resource development & assessment in fast emerging wind energy sector
Wind farm design and flow modelling


Wind power is emerging as an environment
friendly alternative to meet the ever
increasing world demand for electricity, at an
affordable price.
12-03-2013, 01:57 PM
Post: #7
i dont know what is wind energy:-BlushConfusedHuh
13-03-2013, 09:48 AM
Post: #8
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