wind turbine slideshow

8/3/2019 Wind Turbine Slideshow

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Wind Turbine Project

Designing wind turbines for urban use


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MAGICbox University of EastLondon Wind power where and how has it beenused?


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Windmills Used since the Middle Ages to grind grain


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Windmill mechanism

Slow rotation andhigh torque to drivegrindstones lots ofgears

Able to pivot into thewind


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Water pumping forirrigation


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Land yacht motive power


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Rotating cylinders act like sails


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Wind power used for electricitygeneration Wind Turbines take energy from the wind andconvert it to useful power Why is this relevant now? What about solar power?


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European wind energy


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Average wind speed for the UK

Wind speedcorresponds closelywith elevation

Towns and cities arenot distributed inareas with most wind


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Offshore mean wind speed


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Urban wind shear


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Why doesn't everyhouse or building inthe UK have it's ownwind turbinegenerator?


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Horizontal Axis Wind Turbine Variable pitch bladesadapt to wide range ofwind speeds Blades always in thewind Tall masts benefit highwind shear sites


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Difficult to transportand construct(especially offshore Have to turn bladesinto the wind Vibration problems


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Horizontal Axis Wind Turbines

Darrieus Giromill

Savonius

Starting torque needed Cyclic ripple vibration

Blades only in the windhalf the time


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Giromill variant

Helical VAWT


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Wind Power = (density of air) (blade diameter)

2(wind velocity)

3(efficiency constan

OR

PowerTURBINE

= AIR

D2v3


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Further stuff to think about..

Betz law: a windturbine can onlybe about 59%efficient more

than that andthere is no powerleft to spin theblades


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Tip Speed Ratio

Tip speed ratio =blade tip speed/windspeed

More blades = lowerblade tip speed andhigher torque

Electrical Generators

need high blade tipspeed


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Design Parameters

Budget? Materials and construction methods?

Will it be efficient or big enough to power

something? Where will it be used?

How long will it last?

Is it visual or functional?


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Pinwheel

Fold paperdiagonally to make asquare

Make 4 cuts most ofthe way to the middle

Cut 5 holes


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Windtunnel Testing Requires fan, flowstraightener andtunnel or tube Allows standard

testing No flow straightenerin picture!


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MAGICbox prototyping laboratory


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Using Computer Aided Design

Quick (with practice

Accurate

Allows prototypingmachines to makedesign


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What happens when the windstops blowing?


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Power Storage Turlough Hillhydroelectric

pumped storage


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Flat section bladesdo not have the lift ofaerofoil sectionblades and get farless power from thewind


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Laser engraving and cutting Engraving a designon a glass tile Cuts and engraveswood, most plastic,card, leather, glass,textiles.. Does not cut metal

wind turbine slideshow

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