วันอังคารที่ 26 พฤษภาคม พ.ศ. 2552

WIND ENERGY PROJECT



SMALL WIND TURBINES (capacity 1 kW to 20 kW )


We have designed and manufacturing of high performance stand alone and grid connected wind turbines in the range from 1,000 Watt up to 20 kW. Wind turbines for your weather conditions and for your application. The wind power generator is an equipment to convert wind energy into electric power which is changed into storage battery group. It can be widely used in rich wind areas but without normal energy supply from any power system .It is capable of providing power for lighting, TV, telecommunication equipment and so on.



Doing business means more to us than selling quality wind turbines. We help you to supply your energy needs. This means that our dealers are trained to estimate your energy requirements and to assist you in finding the best solution for your needs. After selecting the best technological option, we shall assist you in filing building permit requests and in securing all possible grants. We shall not only supply the hardware, but also the services that will enable you to relax in the knowledge that you have professional assistance.




LARGE WIND TURBINE
We design and provide Large Wind turbines from 750 kW to 2 MW. Wind turbines produce electricity by using the natural power of the wind to drive a generator. The wind is a clean and sustainable fuel source, it does not create pollution and it will never run out. Wind energy technology is developing fast, turbines are becoming cheaper and more powerful, bringing the cost of renewably-generated electricity down. Europe is at the hub of this high-tech industry.

HOW WIND TURBINES WORK
Almost all wind turbines producing electricity for the national grid consist of rotor blades which rotate around a horizontal hub. The hub is connected to a gearbox and generator, which are located inside the nacelle. The nacelle houses the electrical components and is mounted at the top of the tower. This type of turbine is referred to as a 'horizontal axis' machine.
Rotor diameters range up to 80 metres, smaller machines (around 30 meters) are typical in developing countries

Wind turbines can have three, two or just one rotor blades. Most have three.

Blades are made of fibreglass-reinforced polyester or wood-epoxy.

The blades rotate at 10-30 revolutions per minute at constant speed, although an increasing number of machines operate at a variable speed.

Power is controlled automatically as wind speed varies and machines are stopped at very high wind speeds to protect them from damage.

Most have gearboxes although there are increasing numbers with direct drives.

The yaw mechanism turns the turbine so that it faces the wind. Sensors are used to monitor wind direction and the tower head is turned to line up with the wind.

Towers are mostly cylindrical and made of steel, generally painted light grey. Lattice towers are used in some locations. Towers range from 25 to 75 meters in height.

Commercial turbines range in capacity from a few hundred kilowatts to over 2 megawatts. The crucial parameter is the diameter of the rotor blades - the longer the blades, the larger the area 'swept' by the rotor and the greater the energy output. At present the average size of new machines being installed is now super megawatt, 1.3-1.85MW, and there are larger machines on the market. The trend is towards moving to these larger machines as they can produce electricity at a lower price.

There are many different turbine designs, with plenty of scope for innovation and technological development. The dominant wind turbine design is the up-wind, three bladed, stall controlled, constant speed machine. The next most common design is similar, but is pitch controlled. Gearless and variable speed machines follow, again with three blades. A smaller number of turbines have 2 blades, or use other concepts, such as a vertical axis.
Most turbines are upwind of the tower - they face into the wind with the nacelle and tower behind. However, there are also downwind designs, where the wind passes the tower before reaching the blades.


The need for clean energy
Conventional methods of generating electricity burn fuel to provide the energy to drive a generator, usually by using the heat to provide steam to drive a turbine. These technologies may use fossil fuels, - coal, oil or gas - or nuclear fuel. Using fossil fuels creates pollution, such as oxides of sulphur and nitrogen which contribute to acid rain, and carbon dioxide which contributes to global climate change.
Although conventional sources of power dominate the energy needs of European countries, wind energy is growing rapidly. Renewable energy sources currently provide nearly 5.4% of the European Union's primary energy needs1 and have the potential to provide much more
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