Page 285 - Handbook of Energy Engineering Calculations

SECTION 7

WIND-POWER ENERGY DESIGN AND

APPLICATION

Wind-Power Calculation Parameters

Analysis of a Wind Turbine’s Power-Generating Capacity

Choice of Wind-Energy Conversion System

WIND-POWER CALCULATION PARAMETERS

Wind turbines are appearing on land and sea around the world as more

countries and industrial firms embrace this source of alternative renewable
energy. In small countries, where electrical distribution distances are short,
wind power can have a major impact on reducing the need for GHG-
producing coal, oil, or gas plants.

But where transmission distances between the source of wind power and
the users of that power are great, problems can emerge. Thus, in the United
States, it is estimated that some 20,000 miles (32,000 km) of transmission
lines must be installed to bring wind-generated power to major using areas.

While wind turbines are relatively easy to install, transmission lines offer a
much larger challenge.
A recent estimate of the potentials of wind-power generation, issued by the
U.S. Department of Energy, is most promising. The estimate projects that

wind power in the lower 48 states could produce more than nine times the
current power production in those states. At this writing the annual power
production in the United States is some 4 million GWh. It is estimated that
wind power could produce 37 GWh. Today’s wind turbines are typically 80

m (262 ft) high. At this height, wind velocities are usually higher, enabling
each wind turbine to produce more electricity.