The Winds of Change for Energy Developers
The Road to Improved Energy Developer Profitability
OrganoWorld has developed a low wind turbine that can improve the bottom line for energy developers
by increasing wind farm yield through power production at wind speeds of only 4 m/sec.
It opens up possibilities for wind energy production in regions that are currently uneconomical.
Winga E-Generator wind turbines can fit comfortably within existing wind parks.
New sites can be located closer to markets, due to the Winga E-Generator's enclosed rotor design which
causes fewer environmental issues with noise and danger to wildlife.
It provides a more viable business case for staying in wind energy production where fields are underperforming.
The Winga E-Generator is a new generation
of augmented wind turbine that can produce up to 5.4 MW of power at
wind speeds of 4.0 m/s. As illustrated by its power curve, typical for
each of the three 1.8 MW generators per turbine, full power can be obtained
at wind speeds as low as 4.0 m/s and in turn this increases the turbines
capacity factor to above 80%. This performance is achieved through much
higher flow stream velocities obtainable using the augmentation effect
of a convergent, divergent and ducted tunnel design, and through the
use of a high solidity, annular rotor design.
Wind velocity through the blades is
the critical operating parameter for all wind turbines. In the case
of the Winga E-Generator, the convergent operates as a funnel to push air
through the rotor blades and the divergent serves to create vacuum and
pull air through the rotor blades. This push-pull augmentation increases
both the pressure differential and the air stream velocity many times
that possible with the simple diffuser augmentation associated with
older generation Diffuser Assisted Wind Turbines (DAWT).
The Winga E-Generator can be installed in
many areas unsuitable for standard 3-bladed wind turbines and will produce
energy that is cheaper than coal, quieter, more predictable, more distributed
and highly suitable for supplying energy to smart grids. Its simple
enclosed design using advanced computerized controls produces high quality
energy from each standalone unit. Energy producers can expect
improved profitability based on lower production costs and installations
closer to markets with higher selling prices.
The world is turning towards "Smart
Grids" to manage electrical power use, provide source management and
to incorporate renewable energy.
The Winga E-Generator is easier to incorporate into Smart Grids than today's conventional wind turbines
because of its greater capacity factor and its constant-speed rotor/generator system which produces "cleaner" energy with fewer voltage and current spikes.
In Class 2 wind regions, the Winga E-Generator really shines
providing energy at a production cost equal to coal power generation.
How we do it
Here is the power graph of a conventional
one point eight megawatt wind turbine. It has a cut-in velocity of 4
meters per second and a rated wind speed of 12 meters per second.
On an average 7 meters per second
wind site, the most frequent wind speeds are between four and seven
meters per second.
The power produced by this turbine
at 7 meters per second is only 650 kilowatts - less than 50% of the
As a result it is producing full
power less than 15% of the time, and will likely have a capacity factor
of less than 45%.
The Scientific Basis
Organoworld used wind tunnel tests
and new and advanced aircraft design software to find and verify a solution.
We began with the simple wind turbine
and the application of accepted principles of fluid mechanics.
We then examined a proven method
of increasing a wind turbine's efficiency by 30 percent adding a diffuser
behind the duct.
But we needed to increase the speed
and energy density of the airflow many times. To achieve this, we replaced
the diffuser by a larger divergent, creating more vacuum which pulls
the air through the unit.
Next, we added a Borger optimized
convergent to compress, align and accelerate the wind in the ducted
channel, creating a venturi.
We replaced the traditional 3-bladed
turbine with three high-solidity, multi-bladed annular rotors. The rotors
extract energy through higher torque, and each rotor feeds its own independent
generator to increase reliability and availability.
The push-pull effect created by
the convergent and divergent greatly increases the air stream flow velocity
through the turbine blades - a critical process parameter.
The wind energy then available
for conversion is proportional to airstream flow velocity cubed. Triple
the wind speed, and the energy produced increases by 3 cubed, or 27.
The Winga E-Generator
Because our design requires an
enclosed, ducted channel around the rotors, any noise will be confined.
And the shape and size of the convergent will keep birds and bats away
from the rotor blades.
Our design features three annular
rotors, each eight meters in diameter. The 27 pivoting airfoil blades
are less than one meter long.
The increased wind velocity traveling
through the blades close to the rotor's circumference produces greater
torque, increasing the energy they produce at their optimum rotation
of 300 rpm.
Each rotor drives a 1.8 megawatt
generator for a total installed capacity of 5.4 megawatts. Controls
vary the diameter of the cone to keep the rotation of the rotors constant,
providing the higher quality electricity needed by the Smart Grid.
Helping the Winga E-Generator achieve
a capacity factor exceeding 80% at low to moderate wind speeds, is its
position on a motorized platform that turns to face the wind.
The platform sits on a sturdy,
multiple concrete or steel column tower. The platform is built
on the ground, where the frame and turbine are assembled. The platform
is jacked up and the legs are added until the tower reaches its optimal
height, generally lower than conventional turbines.
It uses standard construction materials
and methods, boosting the local economy. Most parts and components fit
into standard shipping containers.
The Winga E-Generator's power curve
looks like this. Between 4 and 7 m/s when the winds are the most frequent,
each of the three generators are at full power - 1.8 megawatts for a total of 5.4 MW.
Benefits for Energy Developers
It doesn't have to be located
in isolated wind parks. And by locating the Winga E-Generator closer to energy
consumers you can reduce the capital, maintenance and environmental
costs of transmitting electrical energy.
Install it in parallel with remote
or offshore turbines and you can reduce the impact that varying wind
conditions have on your energy supply portfolio.
Because The Winga E-Generator produces
substantially quieter and more predictable power than conventional wind
turbines it's a more efficient and economical smart grid component.
Installed near a remote community,
a Winga E-Generator, equipped with batteries, could replace current diesel
The Winga E-Generator - a revolutionary
low velocity wind turbine. Supplying more predictable, more distributed,
more competitive and higher quality wind energy to smart grids and power
For worldwide green energy production to advance more rapidly we must address the commercial challenge of competitive production costs and profitability that is not based on government subsidies. The Winga E-Generator allows energy developers to increase their profitability while at the same time it can offer cheaper electricity to the consumer and advance the production of zero emission energy. This is obtained by the innovative techniques applied to maximise energy production at low wind speeds. The environment, the consumer, the energy developer and industry are at last united in a win-win situation. Investments in the Winga E-Generator energy production lead to benefits for energy developers that include:
- Improved profitability/energy production using low velocity sites
- lower energy production costs,
- lower energy intensity for industrial production
- higher energy selling prices by better market proximity
- reduced project size and capital investment per site
- high power quality from each stand alone turbine
- less performance risk in the event of inferior site wind conditions