Wind Energy: The New Alternative - PowerPoint PPT Presentation

About This Presentation
Title:

Wind Energy: The New Alternative

Description:

WIND ENERGY: THE NEW ALTERNATIVE By James Washechek Department of Chemical Engineering, The University of Texas at Austin DESCRIPTION OF WIND TURBINES Converts wind ... – PowerPoint PPT presentation

Number of Views:216
Avg rating:3.0/5.0
Slides: 13
Provided by: jim72
Learn more at: http://che.utexas.edu
Category:

less

Transcript and Presenter's Notes

Title: Wind Energy: The New Alternative


1
Wind Energy The New Alternative
  • By James Washechek
  • Department of Chemical Engineering,
  • The University of Texas at Austin

2
Description of Wind Turbines
  • Converts wind kinetic energy into electrical
    power
  • Numerous industrial turbine designs, for example
    horizontal and vertical axis wind turbines
  • Clean energy alternative, with little to no
    environmental impact
  • Affects environmental aesthetic integrity, some
    migratory bird patterns, and downwind wind
    velocity.

3
History of Wind Powered Turbines
  • 200 B.C. Wind powered machines utilized by
    Persians.
  • 1888 Charles F. Brush developed first energy
    producing windmill in Cleveland, Ohio.
  • 1980s - First modern wind turbines were
    constructed.
  • Past 20 years Newer, better designed wind
    turbines have been developed.

4
Future Wind Energy Capacity
  • Increasing exponentially
  • 3 to 5 times larger energy capacity over next 6
    years
  • 20 of electrical energy supplied by wind energy
    by 2030

World Wind Energy Capacity Approximation (Wiki,
2008)
5
Turbine Power
  • Directly proportional to density of air, area of
    rotor blades, and cube of velocity
  • Efficiency of internal parts affects maximum
    power available
  • Limited to 59 maximum efficiency

where, P power (W) a design efficiency
factor ? density of air (kg/m³) r
radius of wind turbine (m) v velocity of
wind (m/s)
6
Comparisons to Other Energy Sources
  • Environmentally friendly
  • Large resource supply
  • Cheap operating costs, 1cent/kWhr
  • Wind 55.80/MWh
  • Coal 53.10/MWh Natural Gas 52.50/MWh

Wind
vs.
Coal
Natural Gas
7
Horizontal Axis Wind Turbine (HAWT)
  • Most common industrial design today
  • Wind sensors to rotate tower in yaw direction
  • Many found in West Texas where wind velocities
    are high

Horizontal Axis Wind Turbine Design
8
HAWT Advantages and Disadvantages
  • Advantages
  • Disadvantages
  • Variable wind pitch to optimize amount of wind
    absorbed.
  • Able to increase height of tower to harness
    higher wind velocities at higher altitudes.
  • Already the major design for industrial wind
    power generation.
  • Inefficient close to ground level due to
    turbulence
  • Must be large scale making expensive construction
    costs
  • Must be comprised of strong materials (carbon
    fiber and steel) to deal with high winds

9
Vertical Axis Wind Turbine (VAWT)
  • Gearbox and generator at base of vertical rotor
    shaft.
  • Utilizes wind flow in all directions (360).
  • Constructed on buildings to avoid ground level
    turbulence.

Vertical Axis Wind Turbine Design
10
VAWT Advantages and Disadvantages
  • Advantages
  • Disadvantages
  • Cheaper due to less height needed for effective
    operation.
  • No motor is needed to turn rotor blades.
  • Routine maintenance easy due to components being
    situated under vertical rotor shaft
  • Little chance of structural failure
  • Create only half the amount of energy of a
    comparable HAWT
  • Cannot harness higher winds at higher altitudes
    due to smaller height.
  • Complete deconstruction for maintenance.

11
Conclusions
  • Horizontal axis wind turbine the preferred design
    for future industrial use.
  • Future efforts in wind energy technology.
  • Combination of wind energy with current energy
    infrastructure.

Airborne Wind Generator
12
References
  • Hansen, Martin O.L. Aerodynamics of Wind
    Turbines, 2nd Ed. Earthscan Publications Ltd,
    January 2008.
  •  
  • Hau, Erich and H. von Renouard. Wind Turbines
    Fundamentals, Technologies, Application,
    Economics, 2nd Ed. Springer, October 1, 2005.
  •  
  • McCabe, W.L. and J.C. Smith. Unit Operations of
    Chemical Engineering, 7th Ed. McGraw-Hill, New
    York.
  •  
  • Ragheb, M. Theory of Wind Machines, Betz
    Equation. 16 Nov. 2008 lthttps//netfiles.uiuc.ed
    u/mragheb/www/NPRE20498WP20 Wind20Power20Syste
    ms/Theory20of20Wind20Machin es20Betz20Equatio
    n..pdfgt.
  •  
  • "Wind Power." Wikipedia The Free Encyclopedia.
    10 Nov. 2008 lthttp//en.wikipedia.org/wiki/Wind_p
    owergt.
  •  
  • "Wind Turbine." Wikipedia The Free Encyclopedia.
    17 Nov. 2008 lthttp//en.wikipedia.org/wiki/Wind_t
    urbinegt.
Write a Comment
User Comments (0)
About PowerShow.com