VAWT Advantages
- Lower construction cost as there is no need to
build a massive tower structure to support the heavy
assembly.
· As the rotor blades are vertical, a yaw drive|yaw
device is not needed, reducing cost.
- · Can be easier to maintain if the moving parts
are located near the ground.
· VAWTs have a higher airfoil pitch angle, giving
improved aerodynamics while decreasing drag at low and
high pressures.
- · VAWT systems generate 50% more energy than
its HAWT counterpart. Newer systems are made with
rare-earth-alloy magnets which are 25 times stronger
than ferrite magnets also eliminates any need for
grease or oil since no parts actually touch each
other.
- · Straight bladed VAWT designs with a square or
rectangular cross section have a larger swept area
for a given diameter than the circular swept area of
HAWTs.
- · Lower wind startup speeds than HAWT's.
Typically, they start creating electricity at 10 m.p.h.
· Usually have a lower Tip speed ratio/Tip-Speed ratio
so less likely to break in high winds. Low height useful at
location where laws do not permit structures to be placed
high.
- · Mesas, hilltops, ridge lines and passes can
have faster winds near the ground because the wind
is forced up a slope or funneled into a pass and into
the path of VAWTs situated close to the ground.
- · Does not need to turn to face the wind if the
wind direction changes making them ideal in
turbulent wind conditions.
- · VAWT blades are easily seen by birds, eco
friendly wind generating systems. .
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