Reading UNIT 4
D The wind farm is connected to the
power station by a 33-kilovolt
powerline, and a radio link between the
two allows operators to monitor and
control each wind turbine. The nine
225-kilowatt Vestas wind turbines
produce a total generating capacity of
two megawatts and provide around 12
per cent of the energy requirements of
Esperance and its surrounding districts.
E The power produced by a wind
turbine depends on the size and
efficiency of the machine and, of
course, on the energy in the wind. The
energy in the wind available to the
wind turbines is proportional to wind
speed cubed. Thus, the greater the wind
speed, the greater the output of the
turbine. In order to achieve optimum
wind speeds, the right location is
imperative. "You have to accept the
nature of the beast," Mr Rosser, Western
Power's physicist said. "As surface
dwellers our perceptions of wind speeds
are bad. As you go higher, wind speed
increases significantly."
F The most favourable wind sites are
on gently sloping hills, away from
obstructions like trees and buildings
and where the prevailing winds are not
blocked. Computer modelling was used
to select the best site for Esperance's
wind farm. Scientists were concerned
not only with efficiency, but also with
protecting the coastal health
environment which is rich in plant life
and home to tiny pygmy and honey-
possums, and a host of bird species. In
addition, the wind farm is adjacent to
Esperance's popular scenic tourist drive.
G Strict erosion controls have been
implemented and access to the wind
farm is limited to selected viewing
areas. The wind turbine towers are
painted white and devoid of corporate
logos or signage. According to Mr
Rosser there is something of a
worldwide backlash against wind farms
with regard to their visual impact, "But
because wind turbines perform best in
the most exposed positions, they will
always be visible. There is a very real
need to balance environmental and
technical requirements. I think the Ten
Mile Lagoon Wind Farm sets the
standards for environmentally friendly
developments."
H In fact, the project has become
something of a tourist attraction in
itself, Esperance shire president Ian
Mickel said the wind turbines had been
well accepted by locals. "We have
watched the wind farm develop with
great interest, and now we find visitors
to Esperance are equally enthusiastic
about it," he said. The aim now is to
identify other remote locations where
wind turbines will be a feasible means
of supplementing existing power
stations.
8 What is the writer doing in the article?
responding to criticism of a project
reviewing the success of a project
explaining his role in a project
predicting the future of a project
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