Opinion
Wind As Alternative Source Of Power
Apart from unemployment and lately insecurity, the greatest
problem Nigeria faces today is inadequate power supply. It is a general monster
that haunts every home, every Nigerian, irrespective of status.
Every successive government makes promises towards improving
power supply in the country, with huge budgets allocated to it on annual basis.
Yet, power supply has remained epileptic, leaving the country’s economy more
devastated and the citizenry more impoverished.
Research has however, shown that the country’s power supply
can improve with less cost if the government can harness some other sources of
energy apart from water (dam). One of such sources is the wind (wind mill).
Nigeria is endowed with several energy sources such as sun
(solar), water (dam), wind (wind mill) and lignite. Ironically, the government
has, in its energy policies, concentrated only on water (dam) for its
power generation and this has not
produced the expected results in electricity generation for the citizens.
Wind energy as an alternative source of power, is the
conversion of wind into a useful form of energy such as using wind turbines to
make turbines, wind mill for mechanical power, wind pump for water pumping or
drainage. It is renewable, clean and produces no greenhouse gas emission during
operation.
Wind turbines are power system, consisting of two or three
blades propelled by the wind and attached to shaft with a gear mechanics. Wind
mill was dated back to over a hundred years ago. Technological improvements
made it more powerful, robust, easier to deploy, flexible and adaptable to a
lot of climate conditions. It is now referred to as wind turbines.
The wind regime in Nigeria is generally moderate in the south
except in coastal areas, and strongest in the hilly regions of the north,
according to Nigeria rural electrification agency. The mountainous terrains
especially in the middle belts and the northern fringes of the country where
prime wind conditions exist hold high potentials for exploration and
development in electricity.
Over dependence on water dam for power supply has led to a
tremendous shortage of power supply in Nigeria. No nation depends on only one
or two sources of power generation no matter how abundant. That is why even in
the United States and Europe with very stable and highly integrated variety of
power supply system, the market for standby generators and backup UPS batteries
is still huge.
In 2008, wind power produced about 1.5% of worldwide
electricity usage; and it is growing
rapidly. Several countries have achieved
relatively high levels of wind power generation, such as 19% of stationary electricity production in Denmark, 11% in
Spain and Portugal, and 7% in Germany and the Republic of Ireland. As of May, 2009, eight countries
around the world had started using wind power on a commercial basis.
Studies commissioned by the Federal Ministry of Science and
Technology and carried out by Lay Maher International has confirmed great
potentials in wind energy. It has also identified possible sites for viable
wind energy project across Nigeria. The mean wind speed at a height of 10m
above the ground ranges between 2.3m/s and 3.4m/s for selected sites along the
coastal areas, and 3.0m/s to 3.9m/s for high land areas and semi-arid regions.
The rule is that the higher you go, the windiest it gets. Wind turbines are
normally installed at height between 18m and 90m above the ground.
Several researches have shown that in areas with annual mean
wind speeds of 3.5m/s – 4.0m/s or greater, wind power system can deliver
electricity or pump water at cost lower than photo voltaic, diesels, or grid
extension.
And compared to fossil fuel power sources, the environmental
effects of wind energy are relatively minor.
Given the unsteady power supply in Nigeria and the
potentials of other several sources of energy the country is endowed with,
there is the need for Nigeria to diversify and integrate wind energy into her
power sources.
Solar energy has already being integrated, with many street
lights being powered by solar cells.
Therefore, using wind energy will not only serve as
supplementary energy source needed to generate adequate power supply in the
country, it has the potentials of reducing cost of generating electricity and
as well providing employment opportunities for the teeming population.
Harry is a student of Mass Communication, RSUST, Port
Harcourt.
Evelyn Goddey Harry
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