Model W03
Testimonials.
In
the end, it is what our customers say that really matters.
Here are the comments of some of them:
Johnny
Hanekom, Keetmanshoop, Namibia: The two (2) machines
that I've bought, exceed all my expectatoins as far as
power generation is concerned. I am really pleased with
their performance, and I am planning to buy the third
unit.
Johnny
van der Linde, Groblershoop: We are retired on our
farm outside Groblershoop, and have always experienced
a shortage of electricity from the solar panels we had.
With our Winglette wind generator now installed, we are
seeking ways to utilize the abandance of power thats available
now!
Nico
Grobler, East Coast, Mozambique: We have a holiday
home near Vilancuro, and are well please with our Winglette.
Being a pilot for the South Africa Air ways, I just love
the Winglette's modern technology and good looks!
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————Wind
conditions...
Here
are some ideas on the practicalities
on wind conditions which we think will
help you to find a good location for your Winglette wind generator.
All alternative energy, ultimately comes from the sun. The sun heats the surface of the earth. Of this heat, about
1% to 2% is converted in to wind energy, which is 50 to 100
times more that the energy converted into biomass by all plants
on the earth.
The wind speed is extremely important for the amount of energy a
wind generator can convert into electricity. The energy content
of the wind varies with the cube of the wind speed. For example,
the power in a square meter of wind at a wind speed of 8 m/s,
is about 314 Watts. At double the wind speed, that is 16 m/s,
the power in a square meter of wind is about 2500 Watts. A simple
conclusion from this phenomena, is that one should consider
all factors that will improve the
average wind speed for a given site.
Here
are some factors to consider:
- Surface
roughness. High above the ground level, the wind is hardly influenced
by the surface of the earth. At lower levels the wind is greatly
retarded by surface conditions like trees, buildings, and
all kinds of vegetation. The more pronounced the roughness
of the surface, the more will the wind be slowed down. If
you site has rough surface areas, go for a higher tower to avoid gustier winds.
- Turbulence. Not only surface conditions, like trees and buildings causes
turbulence, but changes in the weather patterns, day time
and night time, and uneven terrain. Turbulence decreases the
possibility of using the energy in the wind effectively for
your Winglette wind generator. It also impose
tear and wear on your machine. So,
minimize turbulence.
- Obstacles. Obstacles, like buildings, and trees, decreases the wind speed
down stream from the obstacle. The slow down of the wind increases
with the height and width of such an obstacle. So, stay upwind of any obstacles. If downwind side
of obstacles, consider a higher tower. Remember, trees keep
on growing taller, towers not.
- Tunnel
effect. On hills, for example, one might experience that
wind speeds are higher than in the surrounding area. This
is due to the fact that the wind is compressed on the windy
side of the hill. Tunnel effects can also be found in valleys,
and next to slopes of ridges. It is many times advantageous
to consider these options for a good site for your Winglette wind generator.
- Flagging. If one observe trees, especially conifers or evergreens, you
will notice that their growth are influenced by prevailing
wind conditions. Strong winds can permanently deform the trees.
This deformity is know as flagging. Ecologists have been using
flagging in trees for many decades to ballpark wind speed
for an area. Look at trees and vegetation for clues about wind speed and general wind directions.
These
are some considerations to take into account when selecting
a good site for your Winglette wind generator.
Take your time to weigh all factors properly. You will be rewarded
with a system that takes the best advantage of one of our free gifts on Earth... the Wind.
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