08-08-2012, 03:54 PM
Wind Turbine Power Calculations
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INTRODUCTION
RWE npower is a leading integrated UK energy
company and is part of the RWE Group, one of
Europe's leading utilities. We own and operate a
diverse portfolio of power plant, including gasfired
combined cycle gas turbine, oil, and coal
fired power stations, along with Combined Heat
and Power plants on industrial site that supply
both electrical power and heat. RWE npower also
has a strong in-house operations and engineering
capability that supports our existing assets and
develops new power plant. Our retail business,
npower, is one of the UK's largest suppliers of
electricity and gas.
In the UK RWE is also at the forefront of
producing energy through renewable resources.
npower renewables leads the UK wind power
market and is a leader in hydroelectric
generation. It developed the UK's first major offshore
wind farm, North Hoyle, off the North Wales
coast, which began operation in 2003.
PROBLEM STATEMENT
With the knowledge that it is of critical economic
importance to know the power and therefore
energy produced by different types of wind
turbine in different conditions, in this exemplar we
will calculate the rotational kinetic power
produced in a wind turbine at its rated wind
speed. This is the minimum wind speed at which
a wind turbine produces its rated power.
CONCLUSION
This value is normally defined by the turbine
designers but it is important to understand the
relationship between all of these factors and to
use this equation to calculate the power at wind
speeds other than the rated wind speed.
Having knowledge of how a turbine behaves in
different wind speeds is critical to understand the
income lost by any down time of the turbine. It is
also useful to understand what power a turbine
should be producing so that if there is a problem
Radius - r
Sweap Area
A = πr2
with the turbine this can be picked up on due to
lower than estimated energy values.