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Project Two Wind Energy Generation System Engineering Design Section 3 Group 7 Ashley Elias * Alyssa Metro Tucker Connors * Scott Heyman Alex Hennessy Outline… Problem Building Options and Locations Preliminary Ideas Final Design The Problem…

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Project Two

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Project Two

Wind Energy Generation System

Engineering Design

Section 3 Group 7

Ashley Elias * Alyssa Metro

Tucker Connors * Scott Heyman

Alex Hennessy


Outline…

  • Problem

  • Building Options and Locations

  • Preliminary Ideas

  • Final Design


The Problem…

  • Architecturally integrated wind turbine system

  • Must power whole building

  • Use multiple “small wind” turbines

  • Efficient/Durable/Reliable

  • Cost Efficient

  • Safe


Building Options and Locations

  • New York Times Tower

  • 52 Stories

  • “Green” Structure

  • Tallest building in area

  • Avg. wind speed in NYC is 12 mph

  • Philadelphia Shriners Hospital

  • 10 stories

  • Top 3 floors have interesting stair design

  • Average wind speed= 9 mph

  • Long Island College Hospital

  • 8 stories

  • Surrounded by row houses

  • First “skyscraper” hospital


  • Hancock Tower

  • Our chosen location

  • 60 floors (tallest building in Boston)

  • Two towers

  • Along the Charles River

  • Average wind speed= 12.4 mph

  • Boston Shriners Hospital

  • 9 stories

  • Back wall has curved shape

  • Average wind speed= 12.4 mph


Genius

One horizontal axis wind turbine with a vertical axis one between each blade. It can catch wind from any angle.


Mile High Club

This idea was based around a double propeller air plane. It has one wind turbine in front of the other so the second one catches the wind that the first one misses.


Double Helix

Computations:

Pmax= (.5) p A V3

Pmax= (.5) (1.2 kg/m3) (π*12)(6 m/s)3

Pmax= 407.2 W per wind turbine

The actual power yield will be less than this theoretical power

Horizontal Axis Wind Turbine with metal bands intertwining between each turbine. The bands have aesthetic purposes and they also direct air towards the wind mills.


The Rain Catcher

The blades are shaped so that when the wind mill spins and its in the rain, the ends of the blades catch rain which adds momentum to the spinning.

Computations:

Pmax= (.5) p A V3

Pmax= (.5) (1.2 kg/m3) (π*12)(6 m/s)3

Pmax= 407.2 W per wind turbine

The actual power yield will be less than this theoretical power.


Awesome

The main component is a Giromill vertical axis wind turbine. Each blade is connected at the top and bottom by a horizontal axis wind turbine. It will sit over the edge of a building and the pole running through the center connects it to the building.

Computations:

Pmax= (.5) p A V3

Pmax= (.5) (1.2 kg/m3) (π*1.62)(5.5 m/s)3

Pmax= 819 W per wind turbine

Theoretical output of HAWT only. It will increase with the addition of the VAWT component

The actual yield will be less than the theoretical yield.


Comparison Matrix


Weighted Selection Matrix


Final Design

  • The main component is a Giromill wind turbine.

  • high starting torque

  • Lower blade speed ratio- lowers blade bending stresses

  • More efficient in turbulent winds

  • Connected by two horizontal axis wind turbines.

  • Pointing down over the side of the building where there is the most wind


Power Output

  • Max power output per turbine is 819 W

  • Actual Power Output is

    • P= .59*.75*.95*.90*819W= 310 W

  • We can fit 58 turbines around the perimeter so total area = (58*3.22*π)/4= 466.5 m2

  • 466.5*19= 8,864 Total Watts

  • (8,864 Watts)(8760 h/yr)≈ 78,000 kWh/yr output by all turbines

    • Doesn’t account for VAWT component

    • We will assume that kWh of all turbines including HAWT and VAWT components equals 10,000 W


Break-even Analysis

  • If we assume max wind speed is reached one hour per day…

    • 10 kWh per day * 365 days/year= 3650 kWh in a year

  • It costs about 20 cents per kWh in Boston

    • .20/kWh*3650 kWh= $730

  • Assuming it will cost $20,000 to create and install all wind turbines

    • $20,000/$730= 27 years to break even


Division of Labor

  • Ashley- model diagrams, building and location info, PowerPoint

  • Alyssa- poster

  • Tucker- SolidWorks model, model

  • Scott- model

  • Alex- website


Works Cited

  • "Wind- Average Wind Speed- (MPH)." Wind- Wind Average Wind Speed. 20 Aug. 2008. National Climate Data Center. 22 Mar. 2009 <http://www.ncdc.noaa.gov/oa/climate/online/ccd/avgwind.html>.

  • "Wind turbine." Wikipedia, The Free Encyclopedia. 24 Apr 2009, 10:59 UTC. 27 Apr 2009 <http://en.wikipedia.org/w/index.php?title=Wind_turbine&oldid=285833323>.


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