Wind Energy Systems
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How does a wind turbine make electricity?
The simplest way to think about this is to imagine that a wind turbine works in exactly the opposite way to a fan. Instead of using electricity to make wind, like a fan, turbines use the wind to make electricity.
Almost all wind turbines producing electricity 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 is the large part at the top of the tower where all the electrical components are located.
Most wind turbines have three blades which face into the wind; the wind turns the blades round, this spins the shaft, which connects to a generator and this is where the electricity is made. A generator is a machine that produces electrical energy from mechanical energy, as opposed to an electric motor which does the opposite!
Wind energy is completely clean, infinite and free. Wind energy can help you to save a lot of money and avoid pollution.
Every unit of electricity produced prevents some pollution and greenhouse gases that would otherwise be emitted from large fossil-fuel fired generating plant.
The technologies of wind, solar, storage, and power conversion have matured greatly over the last twenty years.
Advances in the fields of aerodynamics and composite materials have made modern electric power generating wind turbines a reality.
It is now quite reasonable, and common, to use wind power to provide electricity to areas not served by the power grid. Wind power systems can often be less expensive to install and will produce electricity much cheaper than the costs of bringing in power lines long distances or transporting costly diesel for running generators full-time.
Wind turbines range in size from a meter to a hundred meters in rotor diameter and from a hundred watts to a thousand kilowatts in power output. Wind turbines suitable for residential or village scale wind power range from 500 watts to 50 kilowatts.
Small wind turbines are capable of generating between 50 watts and 60 kilowatts of power, and use rotors ranging in diameter from less than 1 to 15 m (3 to 50 ft). Small wind turbines are installed primarily in remote areas where power is needed but access to conventional sources of electricity is either too expensive or too unreliable. Some small turbines, known as micro-turbines, are so compact they can be carried to remote locations on horseback.
A small wind system can be a sound choice when weighed against the expense and environmental damage associated with extending power lines into remote areas.
"Wind power has no resource constraints; the fuel is free, endless. Wind power stations can be constructed and can deliver power far quicker than other conventional sources, with no import dependence and no fuel price risk. ... wind energy is outperforming many other proposed solutions" Corin Millais, EWEA CEO.
Wind energy as it is produced by a new onshore wind farm in a good location is one of the cheapest of the renewable energy technologies. It is competitive with new clean coal fired power stations and cheaper than new nuclear power.
There are two basic systems available for using wind turbines to generate electricity - stand-alone or grid-connected.
Stand-alone systems
Small wind turbines have traditionally been used to generate electricity for charging batteries to run small electrical applications, often in remote locations where it is expensive or not physically possible to connect to a mains power supply.
- Such examples include rural farms, island communities, boats and caravans.
- Typical applications are electric livestock fencing, small electric pumps, lighting or any kind of small electronic system needed to control or monitor remote equipment, including security systems.
Grid-connected systems
Here the output of the wind turbine is directly connected to the existing mains electricity supply. This type of system can be used both for individual wind turbines and for wind farms exporting electricity to the electricity network.
Wind and solar are often combined in a hybrid system because they reinforce each other on a daily and seasonal basis.
The wind often blows when the sun is not shining (night, storms, winter, etc.). The sun often shines during periods with low wind (summer, wind lulls due to high-pressure systems, etc.).
Contact us now to get a Site Survey and System Design
This is a full design service to tailor a system to your required needs and budget. It includes a comprehensive site survey, wind speed and/or solar insolation calculations, optimal system design, prediction of output and economic benefit, plus a full system quotation.
Siam Green Power International Co. Ltd. provides Green Power Systems - solar, wind, and renewable energies - for private homes and industries. We offer Design, Project Management, Installation and Maintenance of Green Power Systems. Our systems are mainly produced in Thailand based on advanced German Technology.
Investing in Green Power now builds energy independence and moves us towards a healthier future.
Contact us now for a detailed personal quotation.
Email: info@SiamGPI.com
