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WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
WIND ENERGY
Siraj AhmedPhD
Associate Professor
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
SOURCES OF WIND
 Wind is air in motion.
 Is the result of the conversion of the
potential energy of the atmosphere
into kinetic energy due to pressure
differential.
 Most prominent feature of climatology
in INDIA is the monsoon circulation.
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Uneven heating of earth’s surface and rotation
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
Kinetic energy in the wind
is about 0.7x1021 J.
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
 The fuel is wind when the power is
generated by wind
 1% of land area is needed for
installation of Wind Turbine
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Wind Power
PT = CP 1/2 AV V2
PT wind power
CP power coefficient or efficiency
 air density
A swept area of wind turbine
V wind speed
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
ENERGY EXTRACTION
CpMax = 16/27
approximately 59%
Betz Criterion
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Turbine Evolution
Used for
• Pumping water
• Grinding grain
Mainly used for
• Generating
Electricity
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
State-wise Wind Power Installed Capacity
State
Gross Potential (MW) Total Capacity (MW) till
31.03.2010
Andhra Pradesh 8968 136
Gujarat 10,645 1864
Karnataka 11,531 1473
Kerala 1171 28
Madhya Pradesh 1019 229
Maharashtra 4584 2078
Orissa 255 -
Rajasthan 4858 1088
Tamil Nadu 5530 4907
Others 4
Total
(All India)
48,561 11807
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
OFF-SHORE INSTALLATION
 Installation in shallow water few kilometers
from the seashore.
 The key feature for off-shore is high reliability
of wind.
 In innovative move, turbines are placed on
floating platforms and anchored to the sea
bottom.
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
WIND POWER PENETRATION
 Up to 10% is the short term goal for many countries.
 Germany in particular, several power utilities are
expecting future wind contribution as high as 30%.
 Uncertainty of wind constitutes a challenge to
achieve a much higher degree of grid penetration.
 Work is on for wind models for predicting the power
for next 24 to 48 hours
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
CRITERION
 Criterion for identification of a
potential site
 Sites having wind power density
greater than 200 W/m2 at 50 m
height
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Environmental Impact
Noise
 Mechanical Noise - gear box, generator
 Aerodynamic Noise - Swishing sound
 Wind farm at 350 m away
 noise level - dB(A) 35-45
 Electromagnetic interference
 Visual impact
 Shadow flicker
 Ecology, Loss of Bird Life
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
ECONOMICS
 Annual Energy Production
 Capital Cost
 Annual capital charge rate
 Pay back period
 Operation & maintenance cost, insurance, land
leasing, etc.
 Life Cycle Cost Analysis
ANNUAL ENERGY PRODUCTION DEPENDS
 Speed power curve of wind turbine
 Wind speed frequency distribution of site
 Availability of wind turbine
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
What is needed?
 Allow wind turbine projects on agricultural
land where cultivation is not affected.
 Further off-shore wind power needs to be
assessed and explored.
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
1
National Plan
A nationwide wind monitoring campaign is to be
started at the earliest to have clear picture of wind
resource potential of India.
Other alternative is to seek advanced methods of
assessment by International Agencies for drawing
wind atlas of the country
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
WMS of 50 metre height and above in
• Himalayan region
• J&K
• Himachal Pradesh
• Laddak
• Thar Desert and
• Aravalis in particular &
• other inland areas in general
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Off-Shore
•Higher in Indian context and needs to be quantified
with advanced techniques at
•Bay of Bengal
•Arabian sea
•around Andamans and Nicobar Ilands, and
•Lakshadeep etc. for wind atlas of the off-shore areas
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
2
Off-Shore
It needs to be quantified the wind energy potential
with advanced techniques at several place
around the shore line
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
3
National Policy
Efforts at national level for indigenous
development of commercial wind
turbines is to be initiated.
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
4
Massive Efforts
Training the man power for inland and off-
shore wind farms, use of latest softwares
and efforts for developing Indian version of
wind analysis, simulation and modelling
software and wind farm design software.
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
5
Education
M.Tech. level course on Wind Energy can
be started in few Institutes
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
6
Re-Powering
Replacing older, less efficient wind turbines with a
smaller number of more powerful recent models
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
7
Targets for Renewable Energy
To develop the necessary regulatory frameworks
to expand renewables, including financial
frameworks, grid access regulation, planning and
administrative procedures.
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
8
Specific Policy Mechanism
The market for generated power needs to be
clearly defined in national laws, including stable
long term fiscal measures that minimize investor’s
risk and ensure an adequate returns on
investment.
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Need of the Hour
9
Electricity Market Reforms
Removal of barriers to market entry, removing
subsidies to fossil fuels and nuclear and
the social and environmental costs of
polluting energy
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Current Research Areas
• Integration of WECS with large buildings
• Wind power forecasting model, short and long term
• Penetration limits in grid
• System integration of WE
• Lightning protection of blade and tower structure
• Testing and reliability of composite materials for
blade in different environmental conditions
• Numerical & observed wind atlas – modeling,
verification & application
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
….Current Research Areas
• Stand alone and non-grid WECS
• Wind – Solar conversion systems for different applications
• VAWT – aerodynamic studies of various configurations
• Offshore – foundation, cable & peculiar issues of marine
operation
• Human resource development & assessment in fast
emerging wind energy sector
• Wind farm design and flow modelling
WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL
DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
Conclusion
Wind power is emerging as an environment
friendly alternative to meet the ever
increasing world demand for electricity, at an
affordable price.

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4.1 Siraj.ppt

  • 1. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA WIND ENERGY Siraj AhmedPhD Associate Professor
  • 2. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA SOURCES OF WIND  Wind is air in motion.  Is the result of the conversion of the potential energy of the atmosphere into kinetic energy due to pressure differential.  Most prominent feature of climatology in INDIA is the monsoon circulation.
  • 3. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Uneven heating of earth’s surface and rotation
  • 4. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL Kinetic energy in the wind is about 0.7x1021 J.
  • 5. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA  The fuel is wind when the power is generated by wind  1% of land area is needed for installation of Wind Turbine
  • 6. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Wind Power PT = CP 1/2 AV V2 PT wind power CP power coefficient or efficiency  air density A swept area of wind turbine V wind speed
  • 7. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA ENERGY EXTRACTION CpMax = 16/27 approximately 59% Betz Criterion
  • 8. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Turbine Evolution Used for • Pumping water • Grinding grain Mainly used for • Generating Electricity
  • 9. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA State-wise Wind Power Installed Capacity State Gross Potential (MW) Total Capacity (MW) till 31.03.2010 Andhra Pradesh 8968 136 Gujarat 10,645 1864 Karnataka 11,531 1473 Kerala 1171 28 Madhya Pradesh 1019 229 Maharashtra 4584 2078 Orissa 255 - Rajasthan 4858 1088 Tamil Nadu 5530 4907 Others 4 Total (All India) 48,561 11807
  • 10. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA OFF-SHORE INSTALLATION  Installation in shallow water few kilometers from the seashore.  The key feature for off-shore is high reliability of wind.  In innovative move, turbines are placed on floating platforms and anchored to the sea bottom.
  • 11. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
  • 12. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA WIND POWER PENETRATION  Up to 10% is the short term goal for many countries.  Germany in particular, several power utilities are expecting future wind contribution as high as 30%.  Uncertainty of wind constitutes a challenge to achieve a much higher degree of grid penetration.  Work is on for wind models for predicting the power for next 24 to 48 hours
  • 13. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA CRITERION  Criterion for identification of a potential site  Sites having wind power density greater than 200 W/m2 at 50 m height
  • 14. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA
  • 15. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Environmental Impact Noise  Mechanical Noise - gear box, generator  Aerodynamic Noise - Swishing sound  Wind farm at 350 m away  noise level - dB(A) 35-45  Electromagnetic interference  Visual impact  Shadow flicker  Ecology, Loss of Bird Life
  • 16. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA ECONOMICS  Annual Energy Production  Capital Cost  Annual capital charge rate  Pay back period  Operation & maintenance cost, insurance, land leasing, etc.  Life Cycle Cost Analysis ANNUAL ENERGY PRODUCTION DEPENDS  Speed power curve of wind turbine  Wind speed frequency distribution of site  Availability of wind turbine
  • 17. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA What is needed?  Allow wind turbine projects on agricultural land where cultivation is not affected.  Further off-shore wind power needs to be assessed and explored.
  • 18. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 1 National Plan A nationwide wind monitoring campaign is to be started at the earliest to have clear picture of wind resource potential of India. Other alternative is to seek advanced methods of assessment by International Agencies for drawing wind atlas of the country
  • 19. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA WMS of 50 metre height and above in • Himalayan region • J&K • Himachal Pradesh • Laddak • Thar Desert and • Aravalis in particular & • other inland areas in general
  • 20. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Off-Shore •Higher in Indian context and needs to be quantified with advanced techniques at •Bay of Bengal •Arabian sea •around Andamans and Nicobar Ilands, and •Lakshadeep etc. for wind atlas of the off-shore areas
  • 21. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 2 Off-Shore It needs to be quantified the wind energy potential with advanced techniques at several place around the shore line
  • 22. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 3 National Policy Efforts at national level for indigenous development of commercial wind turbines is to be initiated.
  • 23. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 4 Massive Efforts Training the man power for inland and off- shore wind farms, use of latest softwares and efforts for developing Indian version of wind analysis, simulation and modelling software and wind farm design software.
  • 24. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 5 Education M.Tech. level course on Wind Energy can be started in few Institutes
  • 25. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 6 Re-Powering Replacing older, less efficient wind turbines with a smaller number of more powerful recent models
  • 26. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 7 Targets for Renewable Energy To develop the necessary regulatory frameworks to expand renewables, including financial frameworks, grid access regulation, planning and administrative procedures.
  • 27. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 8 Specific Policy Mechanism The market for generated power needs to be clearly defined in national laws, including stable long term fiscal measures that minimize investor’s risk and ensure an adequate returns on investment.
  • 28. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Need of the Hour 9 Electricity Market Reforms Removal of barriers to market entry, removing subsidies to fossil fuels and nuclear and the social and environmental costs of polluting energy
  • 29. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Current Research Areas • Integration of WECS with large buildings • Wind power forecasting model, short and long term • Penetration limits in grid • System integration of WE • Lightning protection of blade and tower structure • Testing and reliability of composite materials for blade in different environmental conditions • Numerical & observed wind atlas – modeling, verification & application
  • 30. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA ….Current Research Areas • Stand alone and non-grid WECS • Wind – Solar conversion systems for different applications • VAWT – aerodynamic studies of various configurations • Offshore – foundation, cable & peculiar issues of marine operation • Human resource development & assessment in fast emerging wind energy sector • Wind farm design and flow modelling
  • 31. WIND ENERGY LAB, DEPARTMENT OF MECHANICAL ENGINEERING, MANIT BHOPAL DEPARTMENT OF MECHANICAL ENGINEERING, M.A.N.I.T. Bhopal, INDIA Conclusion Wind power is emerging as an environment friendly alternative to meet the ever increasing world demand for electricity, at an affordable price.

Editor's Notes

  1. Over 5,000 years ago, the ancient Egyptians used wind power to sail their ships on the Nile River. Later, people built windmills to grind their grain. In 1891, the first electrical output wind machine was developed incorporating the aerodynamic design principles.