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THE WIND HAT

THE WIND HAT. Xinli Wu EDSGN 100. Spring 2009 Sponsor Construction Specialties. Team One, Section 10 Monica Byrne Desire Williams John Fitzpatrick Austin Darigo. Our Mission. Small Wind Smaller approach to wind power generation Architecturally appealing Not a bolted-on afterthought

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THE WIND HAT

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  1. THE WIND HAT Xinli Wu EDSGN 100 Spring 2009 Sponsor Construction Specialties • Team One, Section 10 • Monica Byrne • Desire Williams • John Fitzpatrick • Austin Darigo

  2. Our Mission • Small Wind • Smaller approach to wind power generation • Architecturally appealing • Not a bolted-on afterthought • Building integrated • In new buildings • Incorporated into existing structures

  3. Our Location – Boston, MA • Increasing Electric Costs • 2008 – Cost of electricity jumped 12.6% • Need for alternative ways of providing electricity • High Wind Speeds • Boston – ranked high among windiest cities in US • Average wind speeds – 12.5 mph • Our target – commercial office building

  4. Customer Concerns • Pena-Plas – Sean O’Toole – Vice President-Treasurer • Small business – interested in alternative forms of energy generation • Solar • Wind • Main Concerns • Initial cost • Limited capital • Investment payback • Willing to wait 10 years for investment payback • Maintenance free

  5. Horizontal VAWT – Our Idea • VAWT • Functions better with turbulent wind • Less noise levels than a HAWT • Performs well in any wind direction • Horizontal VAWT • Noise levels stay the same • Collects more wind with Chimney Effect

  6. Horizontal VAWT – Our Idea • Specifications • Made out of aluminum alloy • Roof Integrated • Has emergency shutdown • Network of 5 turbines per side of building

  7. Chimney (Stack) Effect • Temperature differences cause the air inside the building to be either more/less dense than the air outside the building. • Air infiltration – most buildings are not totally sealed, so therefore there is outside air entering the building. • Trying to achieve equilibrium in air temperature – air starts to rush in and out of the building.

  8. Accelerated Air Flow • Pressure increases as the air travels up the building. • Chimney/Stack effect causes accelerated flow of air coming out of the building. • When air escapes from top of building, causes enough force to drive the wind turbines.

  9. The Prototype

  10. Power Generated • Our design • Turbine dimensions • Length – 15 feet – 4.6 meters • Swept radius – 3.05 feet - .93 meters • Swept area – 12.4 m2 • Power generated • Pmax = ½ ρ A V3 • = 1.334 kwatts • Focus of our design – chimney effect – more power expected

  11. Investment Payback • Boston – 2 hours of 12.5 mph wind • Each turbine – 2.7 kwh per day • Per year – 973.8 kwh • Electricity costs - $.20/kwh • Savings per year = $.20/kwh x 973.8 kwh • Cost of turbine and installation ～ $2000 • It will take 10.3 years to reach break even • Return on Investment (ROI) will be positive after 10 years • Our small business customer – willing to wait 10 years

  12. Building Integration – Aesthetically Appealing • Used in designing new buildings • Can be integrated into existing structures • Hidden from normal view

  13. Benefits of Our Design • VAWT – turned horizontally • Utilizes chimney effect • More power generated from accelerate air flow • Hidden from view • Physically appealing • Shielded from elements • Less damage from rain • Environmental concerns • Roof covers turbines • Birds not in danger of being caught in turbines • Easy maintenance if needed • Turbines located close to roof - accessible • Less noise • VAWT – minimizes noise from turbine rotation

  14. Thank you! • We would like to thank Xinli Wu, Construction Specialties for providing us with this opportunity, and Sean O’Toole, Vice President and Treasurer of Pena-Plas, for consulting with us about customer concerns. • Any questions?

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