The first wind machines were used in Persia, as far back as 200 B.C for the purposes of grinding grain. By 250 A.D the Romans began to use the same process for the same purpose. The Dutch started using windmills to drain water from the areas lying in the Rhine River delta.
Windmills began to be used for the production of electricity in the year 1888, and the first such windmill, meaning the first wind turbine was built by Charles F Brush in Cleveland, Ohio. By the year 1908, some 72 wind turbines were being used to produce electricity between the ranges of 5 kilowatt to 25 kilowatt. Windmills to produce electricity were commonly found on farms by the 1930s in the Unites States.
Horizontal Axis Wind Turbines
The Horizontal Axis Wind Turbines or HAWT house an electric generator and the main rotator shaft at the top of a tower. Both need to be pointed into the wind, for generation of electricity. A wind vane is usually enough for this purpose in the case of small turbines, but in the case of large turbines, a servo motor coupled with a wind sensor is used to point into the wind. The rotation of the blades is controlled by a gearbox which increases the rotational speed of the blades as and when required. The turbine is usually pointed in the upwind direction so as to protect it from the turbulence created by the tower. Many times downwind machines are also built in a bid to combat the problem of turbulence. Such machines preclude the use of additional mechanism in order to keep the turbine in line with the wind; this is because the blades can be allowed to be bent during high winds.
Vertical Axis Wind Turbines
Vertical Axis Wind Turbines or VAWTs, have vertical alignment of the shaft. One of the most important advantages of such turbines is that there is no need for the turbine to be pointed into the wind for efficacy. These wind turbines are generally used on sites that witness a variable wind direction. A wind force from any direction can be used by Vertical Axis Wind Turbines.
The presence of vertical axis means that the both the gearbox and the generator can be placed near ground as there is no need for the tower to offer it support. This also means that the gearbox and the generator are accessible when it comes to the maintenance of the wind turbines.
Wind Turbines â Design and Construction
It is the job of the wind turbines to exploit the wind energy existing at a particular location. Designers and builders use the aerodynamic modeling for the determination of the various control systems to be used, number of blades, shapes of the blade, and the optimum height of the tower.
The modern wind turbine is primarily used for conversion of wind energy into electricity energy. In accordance with this purpose, the wind turbine has three major components, namely the rotor component, the generator component, and the structural component. Almost 20% of the cost of the wind turbine is taken up by the rotor component, while an approximate 34% of the cost is consumed by the generator component. 15% of the cost of the wind turbine is taken up the structural component.
These days’ environmental activists are championing the use of wind turbines, for the production of electricity as they are environment friendly and if at all, release only a minimal amount of pollutants.
Windmill Plans Blogs
Wind generators are one of the most reliable forms of alternative power sources on the planet. They are made to manufacture power by transforming the kinetic energy of the wind into mechanical energy, which is then either harnessed directly (in the case of windmills, for example, which were used to change wheat into flour, or to pump water for farming) or coupled to a generator that creates a DC output that can be used in a more general sense. In this article I will be talking about the type of wind generators that produce electric energy, as this is more useful to us in our daily lives.
Wind turbines are basically large windmills, with gigantic blades that rotate in the wind and produce power from the conversion of the winds force. Wind turbines are manufactured from plastic, aluminium, steel and numerous other space age metals.
Wind turbines have a few negative impacts on the environment. They are very visible, and quite unsightly since they must be put in proximity to windy, open terrain to be useful – attempts to locate them off the coast have been met with great success. They require a great deal of energy in their manufacture, energy which is typically fossil-based, and therefore it can take a considerable amount of time before they are positive in terms of total carbon emissions – this time can be anywhere from 2 to 5 years. Wind turbines are linked to the mauling of rare species of birds that can be mutilated as they pass through the turbine fans during migratory passages.
With all of the downsides aside, wind turbines should be a choice when talking about a broad plan for renewable energy. Once erected, wind turbines are amazingly efficient in a larger sense – they generate power from a natural, eco-friendly renewable resource, without the hidden social or environmental penalties that we incur with the use of fossil fuels – theres no need to mine for fuel or to transport it – there are no global warming pollutants created, and no need to store, process, or to dispose of toxic wastes.
At the small side of the scale, turbines can be as tiny as 5 feet in diameter and are capable of only a few hundred watts. On the high end of the spectrum, turbines can be as huge as three hundred feet in diameter and are capable of generating two to five megawatts of power.
Similar to photovoltaic solar power generation, there might be rebates available for construction, and excess energy can be sold back to the power company.
Wind velocity is impacted by topography and increases with height above the ground, so wind turbines are generally installed on top of large towers. In a typical application, the wind turbine sits on top of a tall tower and generates low voltage DC which is used to charge a battery store – this stored potential energy is ultimately utilized by routing it through an inverter that changes the low voltage direct current power into utility voltage alternating current electricity that can be used in household applications. By concentrating a lot of turbines into wind farms a substantial amount of electricity can be stored and utilized, perhaps for a whole city or town.
Because the wind doesnt blow all of the time in many areas, wind turbines are used as adjuncts in hybrid configurations with many different technologies like photovoltaic panels, and diesel generators to provide a consistent source of electricity.
Dissimilar to fossil-fuel stations, wind turbines are clean and green – they dont create the carbon dioxide emissions that are causing greenhouse gases or the SO2 emissions that cause acid rain.
Todays turbines are divided into 2 categories, namely horizontal turbines and vertical turbines. Todays horizontal axis wind turbines are actually far better at capturing the wind than vertical axis turbines given the same amount of swept area (which is the diameter of the circle traced by the outside tip of the rotor blades).
The fastest growing alternative energy platform in the world is the wind. Wind power is a renewable energy source with a lot going for it. It produces electricity by converting the inherent energy in wind through a generator in a wind turbine. It produces no pollutants of any sort and will be available to us for as long as wind exists, to wit, a very long time.
This energy can be accessed by using a home wind generator and replace traditional energy sources. Wind turbines is a good option to greatly reduce electricity bills, or completely get off the grid depending on the power of the wind generator.
Well, you can by installing a small, residential wind turbine on your property. These turbines are designed to work on a per home basis. Given the right conditions, a residential turbine can produce all of the electricity you need.