7/2/2017. On the energy concept. Outline. On the energy concept: Society. Description of main idea. How to harvest wind energy

Transcription

1 Outline Description of main idea On the energy concept Wind energy How to harvest wind energy Wind energy harnessing HAWT Wind Energy Control By: Majid Firouzbahrami Supervisor: Dr. Amin Nobakhti 2 On the energy concept: Society Energy: the ability to perform. On the energy concept 3 4 1

2 On the energy concept: Policy On the energy concept: Economy 5 6 On the energy concept: Conv. Resources On the energy concept: International Issues 7 8 2

3 On the energy concept: Renewables On the energy concept: Renewables trends Solar Wind Geo Thermal Hydro Bio Mass 9 10 Wind energy

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5 Wind Energy: Advantages 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 Wind Energy: Advantages 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 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 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 Wind Energy: Disadvantages Wind Energy: Disadvantages LAND USE WILD LIFE AND HABITAT VISUAL IMPACT PUBLIC HEALTH

6 Wind Energy: Future 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. 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 Wind Energy: Future Wind Energy: Future IRAN IRAN: MAPNA Wind Farm (KAHAK)

7 Wind energy harnessing: Unconventional Wind energy harnessing Wind energy harnessing: Conventional Wind energy harnessing: HAWT 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

8 Wind energy harnessing: VAWT HAWT: Structure and main parts 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 THANK YOU FOR TAKING YOUR TIME WIND ENERGY CONTROL BY: MAJID FIROUZBAHRAMI 8