Waqas Ahmed 23-09-2008, 11:56 AM

Wind Power

The first use of wind power was to sail ships in the Nile some 5000 years
ago. The Europeans used it to grind grains and pump water in the 1700s
and 1800s. The first windmill to generate electricity in the rural U.S.A. was
installed in 1890. Today, large wind-power plants are competing with electric
utilities in supplying economical clean power in many parts of the world.
The average turbine size of the wind installations has been 300 kW until
the recent past. The newer machines of 500 to 1,000 kW capacity have been
developed and are being installed. Prototypes of a few MW wind turbines
are under test operations in several countries, including the U.S.A. Figure 2-1
is a conceptual layout of modern multimegawatt wind tower suitable for
utility scale applications.
1
Improved turbine designs and plant utilization have contributed to a
decline in large-scale wind energy generation costs from 35 cents per kWh
in 1980 to less than 5 cents per kWh in 1997 in favorable locations
(Figure 2-2). At this price, wind energy has become one of the least-cost
power sources. Major factors that have accelerated the wind-power technology
development are as follows:
• high-strength fiber composites for constructing large low-cost blades.
• falling prices of the power electronics.
• variable-speed operation of electrical generators to capture maximum
energy.
• improved plant operation, pushing the availability up to 95 percent.
• economy of scale, as the turbines and plants are getting larger in size.
• accumulated field experience (the learning curve effect) improving
the capacity factor.

Wind Power and Solar Power can solve Pakistan Big Problem of Power.


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Waqas Ahmed Join Date: Sep 2008 Location: New-Multan Age: 25 Posts: 338 Thanks: 39 Thanked 38 Times in 22 Posts Contact Number: 0321-7359605, 0313-7359605 Program / Discipline: MSTS Class Roll Number: 07-22 Show Printable Version Email this Page

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