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Ген.д-р, к.т.н.,
Евгений Дмитриевич Сорокодум


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Windpower station with a oscillating cylindrical body





 

1. The expediency of the search of a new type of wind generators

 

Presently, there is a big bet on the traditional renewable energy sources to solve energy problems: wind energy, flow energy, energy from sea wave, solar energy etc. are used. Different types of wind power plants, hydro power plants using wind energy, currents and waves, solar power plants, bio fuel and others are being developed.

But these plants will not widespread because they have some serious shortcomings:
1. The high cost of power plants and high price of electricity produced.
2. It is necessary to build large wind power towers, dams or other complex structures.
3. Negative impact on environment.
4. Complexity in construction and exploitation.
5. Lengthy and difficult process for structuring power plants.
Therefore, it is necessary to search and develop new types of renewable energy sources that can not have these drawbacks.

 

 

 

2. The principle of production of energy with the help of cylinders swinging with the wind

One of these new types of plants can be wind power plant getting energy from wind with the help of the cylinder translated into oscillatory motion from wind.
It is known that the flow around a cylinder makes a way of vortex pocket behind it - two vortices that are formed and are detached not simultaneously.



This force may lead to vibrate the cylinder, if the cylinder is mounted on a movable mount. If properly organized a system to get the mechanical energy, it can be converted into electrical energy. This will be a source of energy.

 

 

 

3. Analogues

Traditionally wind power stations that use rotating blades have a number of significant shortcomings and due to this they can not find wide application (a very high cost, bulkiness, low efficiency, design complexity, etc.).

Presently in developed countries, they have started developing wind power station with oscillating working bodies (wings, cylinders, plates and other similar things).

U.S. firm Atelier DNA is developing wind power station which gets energy through vertical cylinders driven into the swings from the wind.

 

Atelier DNA believes that for Masdar (UAE), 1203 wind cylinders will be sufficient, standing at a distance of 10-20 m, each 55 m high on concrete base. Wind cylinders are made of resin impregnated carbon fiber, the base is 0.3 m; the top of the cylinder narrows to 0,05 m, each cylinder includes electrode layers and ceramic discs of piezoelectric material, with compression generates current.

It is planned to get electrical power tens of megawatts from such wind farms.


http://www.gearfuse.com/windstalk-concept-could-replace-turbine-powered-energy/

 

 

                  Vortex Bladeless

 

 

This new wind turbine wobbles elegantly in the wind, generating electricity without rotating blades. “It looks like asparagus,” says David Suriol, one of the founders.

A Spanish company called Vortex Bladeless has produced a wind turbine that takes advantage of the vortices produced when wind moves around an obstacle.

If you put any object in the path of the wind, it will create an undulating vortex behind the barrier. This is a problem that has plagued engineers for years: bridges have fallen due to wind eddies.

Vortex Bladeless engineers have designed their turbine to take advantage of this vortex. The thin, cone-shaped turbine is made of carbon fiber and fiberglass with the motor at the bottom instead of the top (like traditional turbines) to improve sturdiness. The design ensures that the wind's vortex spins synchronously along the entire cone. “The swirls have to work together to achieve good performance,” Villarreal explains. There is also a ring of magnets at the base of the cone that give the rotations a boost regardless of wind speed.

There are many advantages to the new Vortex design: It is cheaper to manufacture than current pinwheel turbines. Maintenance prices are also lower because there is no friction from mechanically moving parts (e.g., the blades on a traditional turbine), which reduces the need for oiling and bolt replacement. It is completely silent and birds can fly around them safely (though it has yet to be announced whether the turbine is nest-proof.)

New wind technology, however, always receives some skepticism: Most wind-harvesting technologies only work at a fraction of their most efficient output. Wind turbines need smooth, laminar airflow; the kind you only really find at about 100 meters (328 feet) above the ground. The wind that we know and love to hate is turbulent, messy and generally no good for wind turbines. Vortex claims that their wind turbine can adapt to any wind speed with the assistance of the magnets in its core; however, the details on how this actually works are frustratingly hard to come by.

The Vortex device has been computationally modeled, tested in a wind tunnel, and there are prototypes out in the open, but details on tests carried out by the company or independent labs are currently scant. It is also not the first wind turbine to take advantage of oscillatory technology. Researchers in the '80s found that the swirling oscillations were too random for reliable power generation, and the speed of oscillations put a lot of stress on the structure and caused it to break down unexpectedly.

The idea hasn't been terribly successful in the past, so it will be interesting to see how Vortex Bladeless tackles these challenges. While this invention might not revolutionize Earth's renewable power sources just yet, it's still exciting to see what designers are creating.

 

 

 

Australian company Bio Power Systems are developing underwater power plants, exploiting energy from underwater currents using an oscillating cylinder and other similar things.

They are planning to construct hydro electric power with a capacity of 250 KW, 500 KW and 1000 KW.

http://www.biopowersystems.com/

 

 

 

David Labrecque and a team of University of Maine students (Eugene Katsman, Dan Wheeler, Nate Laspina, Eric Lovejoy, Ben Commeau and others) have developed a revolutionary, low-cost, high efficiency, vortex-driven water turbine. The energy system consists of a wing that “swims” through water like a fish following a figure-eight trajectory. Experiments show 30% efficiency at converting the energy in the water to a pumping motion. This is comparable with traditional turbines, yet hydroflexors have several advantages: They are low-cost, the mechanical systems are on the surface where they can be easily serviced and they are environmentally friendly. The system can be used in streams, rivers and tidal flows.
Utilizing vortices to propel a wing along a figure-eight trajectory is a new approach. The Flexor team encourages and will provide support to researchers who want to study this phenomenon and publish their findings. They are also looking for established manufacturers interested in manufacturing and marketing products that utilize this new patent-pending technology. The Flexor team can provide scientific and technical assistance to research and engineer groups.

http://flexorenergy.com/


 

 

 

4. Wind power station exploiting energy with the help of vertical cylinder driven into the swing from wind

Power plant with an oscillating cylinder have the following advantages over traditional:

-the entire surface of cylinder is involved uniformly in collecting energy from the flow (as opposed to the surface of the propeller blades which are unevenly involved).
-wind power station is simple – vertical cylinder with a height of 10-60 m and that is all.
-easily controlled and is consistent with the microprocessor control system and provides optimal power modes.
-no need to design for orientation to the wind.
- high reliability.
- ability to manufacture in the form of compact modules and to install them.
These wind power stations can be installed in places where wind speed is from 1 to 20 m/c and above.

 

5. Our results (know how)

1.A series of experimental studies have been undertaken for currents and forces from swings of cylinders in wide range of frequency and amplitude of oscillations. It has been identified not previously known laws of science.

 

The kinematics of the vortices during the period of oscillation of the cylinder

2. It has been found that due to vortex structure near an oscillating cylinder, effective aerodynamic area can be increased (kinetic energy is extracted from transverse stream flux) several times. See the picture below

Conventional hydraulic area swept by oscillating cylinder and expanded hydraulic (aerodynamic) area used in special conditions of oscillation and vortex structure (external border of stream in figure).

This will increase the energy extraction at the same amplitude of cylinder vibration. At the same time load on per unit effective aerodynamic area decreases and that will increase efficiency of wind energy. This can lead to a twofold increase in wind energy extraction at the same amplitude of cylinder vibration.

3. Oscillating conditions are disclosed when united elasticity is formed (elasticity is caused by the vortex structure of the air around an oscillating cylinder). Use of this elasticity may lead to the use of elasticity to neutralize the forces of inertia of cylinder mass and the associated air mass.
4. Worked out principles of construction of special transmission elements to match the dynamic and kinematic characteristics of the wind load (with consumption of energy). This will lead to the harmonization of energy transfer from the power source to generator (otherwise the energy will return into the air stream) and to increase the rate of energy transfer from wind to the load.
5. Use of a special distribution of elasticity and mass characteristics of the cylinder and plate elasticity to match an external power source with the input characteristics of the mechanic-electrical converter and due to this, collection of kinetic energy will increase from the wind.
6. Use of more effective rules of cylinder oscillation, selection of energy simultaneously with the lifting forces and friction, acting on cylinder, will result in increase of selection of the kinetic energy from wind.
7. Use of wave flow elements to increase effect of wind energy.
8. Application of adaptive microprocessor in control system will produce maximum power at output at different wind speeds.
9. Use of physical effects for getting additional kinetic energy from the latent heat energy and potential energy of the atmospheric pressure.
10. The technique of experimental research is worked for kinematic, dynamic and energy characteristics of an oscillating cylinder as a vibratory system.
11. Methods and programs have been worked out for calculating the wind power station as a unified oscillatory system.
12. Methods are developed for converting mechanical energy into electrical energy.
13. Basic theories are developed for wind-hydro generators with oscillating cylinder.
14. Collected experimental data for oscillating cylinder in a nonlinear oscillating mode.
15. Collected patents data on wind-hydro generator with oscillating working body (wings, cylinders, plates and other bodies) for 80 years.

 

6. We are seeking investors and partners to create the first wind power station with an oscillating cylinder.

We can make research and developmental work on creation of the first samples of new highly effective technics (on the basis of our theoretical and experimental researches). We search for investors and partners for creation of the first samples of this new technics.

 

6.1. We can design and produce the first valid sample of the proposed wind turbines of capacity from 0.1 kW to 50 kW.

 

6.2. Wind power station working with oscillating cylinder across the gorge.

 
 

6.3. Wind power station working with oscillating cylinder in a balloon.

 

 

 

7. We as well on your orders perform following research and design works:

1. Analyze your wind power station development with oscillating component (cylinder, wing or other elements) and give recommendations to improve their performance.
2. To develop program for processing experimental data in the exploitation of wind energy by means of an oscillating cylinder or elastic plate.
3. The experimental data in the extraction of wind energy by means of an oscillating cylinder or elastic plate.
4. Calculation of geometric, kinematic, dynamic and energetic characteristics of the wind turbine with an oscillating cylinder or elastic plate.
5. Calculation and design of transmission elements, for transmission and coordination of energy from an oscillating cylinder or elastic plate to generator.
6. Survey of wind hydro generator with an oscillating wing, cylinder or elastic plate.
7. Atlas of aero and hydrodynamic characteristics of an oscillating cylinder (theoretical).
8. Atlas of the hydrodynamic characteristics of an oscillating cylinder, or an elastic plate (experimental data).
9. Review of patents on wind hydro generator with an oscillating cylinder or elastic plate (copies of patents).

 

 

 









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Опубликовано на: 2011-06-10 (3626 Прочтено)

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