7/2/2017 Outline Description of main idea On the energy concept - - PowerPoint PPT Presentation

7/2/2017 1

Wind Energy Control

By: Majid Firouzbahrami Supervisor: Dr. Amin Nobakhti

• Description of main idea
• On the energy concept
• Wind energy
• How to harvest wind energy
• Wind energy harnessing
• HAWT

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Outline

On the energy concept

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• Energy: the ability to perform ….

On the energy concept: Society

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On the energy concept: Policy

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On the energy concept: Economy

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On the energy concept: Conv. Resources

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On the energy concept: International Issues

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On the energy concept: Renewables

Bio Mass Geo Thermal Hydro Solar Wind

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On the energy concept: Renewables trends

Wind energy

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Wind Energy: Trends

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Wind Energy: Trends

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Wind Energy: Trends

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Wind Energy: Trends

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Wind Energy: Trends

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Wind Energy: Advantages

• Geo Thermal energy requires

special location which is not many in the world whilst wind can be found sufficiently, almost every where

• Investment return time can be

very higher than wind energy harnessing systems

• Wind energy conversion does not

produce greenhouse gas emission in contrast with biomass

• Wind energy can pay back the

energy spent for its manufacture very soon, whilst harvesting biomass corps often takes more energy than can be produced with it

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Wind Energy: Advantages

• Using wind turbine, can generate

electricity ANYTIME unlike solar panels which only work at daytime

• Nearly all countries have several

windy areas, while few countries have continually sunny regions.

• Wind‐produced power costs nearly

twice less per KWh than solar

• Hydro is currently the most used renewable

resource and incredibly efficient if sited

• correctly. Its reliability also surpasses the

wind energy due to stability of water flow against wind

• It is really hard to find a good location for a

dam, so Hydro is not expanding todays. Wind energy is catching up its high position, and it wouldn’t be long until it happen

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Wind Energy: Disadvantages

LAND USE WILD LIFE AND HABITAT PUBLIC HEALTH VISUAL IMPACT

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Wind Energy: Disadvantages

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Wind Energy: Future

• Main Drawbacks
• It is more expensive to produce wind-sourced electricity than other

conventional sources, such as nuclear and thermal energy.

• Wind power is intermittent because winds are unpredictable and

uncontrollable.

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Wind Energy: Future

• IRAN
• Iran has this capacity to produce near to 40,000 MW Wind-produced electricity

which is about half of required energy in the country in a year.

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• IRAN

Wind Energy: Future

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• IRAN: MAPNA Wind Farm (KAHAK)

Wind Energy: Future

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Wind energy harnessing

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Wind energy harnessing: Unconventional

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Wind energy harnessing: Conventional

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• Advantages
• The tall tower base allows access to stronger

wind in sites with wind shear

• High efficiency, since the blades always move

perpendicularly to the wind, receiving power through the whole rotation

• Disadvantages
• Massive tower construction is required
• Components of a horizontal axis wind turbine

(gearbox, rotor shaft …) being lifted into position

• Their height makes them obtrusively visible
• Downwind variants suffer from fatigue and

structural failure

• HAWTs require an additional yaw control

mechanism to turn the blades toward the wind

• HAWTs generally require a braking or yawing

device in high winds to stop

Wind energy harnessing: HAWT

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• 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
• VAWTs can be installed when taller structures

are prohibited

• Disadvantages
• Most VAWTs have an average decreased

efficiency from a common HAWT due to the additional drag that they have as their blades rotate into the wind

• Having rotors close to the ground where wind

speeds are lower, VAWT does not take advantage of higher wind speeds

• VAWT is not commonly deployed due to the

serious disadvantages mentioned above, so is not familiar for investors and this has made it almost neglected over the last 50 years

Wind energy harnessing: VAWT

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HAWT: Structure and main parts

WIND ENERGY CONTROL BY: MAJID FIROUZBAHRAMI

THANK YOU FOR TAKING YOUR TIME