WIND POWER
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Transcript of WIND POWER
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WIND POWERWIND POWER
HOW DO YOU CONVERT WIND INTO ELECTRICITY
Wind Speed Distributions Wind Turbine Selection Turbine Loading Wind Noise Wind Parks
By: Saed Ghaffari
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HOW DO YOU CONVERT HOW DO YOU CONVERT WIND INTO ELECTRICITY WIND INTO ELECTRICITY
• Modern wind energy systems consist of three basic components:
• Tower
• Rotor
• Nacelle
• Wind turbines are mounted on a tower to
capture the most energy.
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HOW DO YOU CONVERT HOW DO YOU CONVERT WIND INTO ELECTRICITY WIND INTO ELECTRICITY
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HOW DO YOU CONVERT HOW DO YOU CONVERT WIND INTO ELECTRICITYWIND INTO ELECTRICITY
• The wind turns the rotor, which turns the
generator to produce electricity.
• To maximize the power extracted, the nacelle, which connects the rotor to the tower and houses the generator, can be rotated into the direction of the wind.
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Wind Speed DistributionsWind Speed Distributions
• It is very important to be able to describe the
variation of wind speeds.
• Turbine designers need the information to
optimize the design of their turbines, so as to
minimize generating costs.
• Turbine investors need the information to
estimate their income from electricity
generation.
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Wind Speed DistributionsWind Speed Distributions
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Wind Turbine SelectionWind Turbine Selection
• Rotor diameters may vary somewhat for a given power, because many manufacturers optimize their machines to local wind conditions.
• A larger generator requires more power
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Wind Turbine SelectionWind Turbine Selection
• Reasons for Choosing Large Turbines
• There are economies of scale in wind turbines,
• Larger machines are particularly well suited for offshore wind power.
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Wind Turbine SelectionWind Turbine Selection
• Reasons for Choosing Smaller Turbines
• Local electrical grids may be too weak to handle the output from a
large machine.
• This may be the case in remote parts of the electrical grid with low population density and little electricity consumption in the area.
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Wind Turbine SelectionWind Turbine Selection
• There is less fluctuation in the electricity output from a wind park consisting of a number of smaller machines, since wind fluctuations occur randomly, and therefore tend to cancel out.
• Costs for large cranes and building adequate roads to carry the
turbine components may make smaller machines more economic in some areas.
• Several smaller machines spread the risk in case of temporary machine failure, e.g. due to lightning strikes.
• Aesthetical landscape considerations may sometimes dictate the use of smaller machines.
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Horizontal Axis “HAWT”Horizontal Axis “HAWT”
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Horizontal Axis “HAWT”Horizontal Axis “HAWT”
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Turbine LoadingTurbine Loading
• Rapid fluctuations in wind speed are called
turbulence and may increase the structural and
dynamic stresses on the wind turbine components.
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Wind ParksWind Parks
• Cities and countries need huge wind farms to satisfy their energy needs.
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Wind ParksWind Parks
• To optimize energy production in a wind farm, turbines are spread 5 – 9 rotor diameters apart in the prevailing wind direction and 3 – 5 rotor diameters apart in the perpendicular direction.
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Wind ParksWind Parks
Wind Park In Cyprus
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Wind ParksWind Parks
• As a rule of thumb, turbines in wind parks are usually spaced somewhere between 5 and 9 rotor diameters apart in the prevailing wind direction, and between 3 and 5 diameters apart in the direction perpendicular to the prevailing winds.
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Thanks for Attention