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Renewable energy: solar powerTours aérogénératrices vortex Synthesis

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Alain Coustou
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Tours aérogénératrices vortex Synthesis

Unread Messageby Alain Coustou » 30/06/07, 11:16

AEROGENERATRICES THE TOURS (TOURS OR VORTEX)

The towers aérogénératrices (or vortex towers) belong to the family of solar towers whose first project was developed here forty years by the French engineer Henri Egard Nazare, pioneer in the field. Compared to Nazare project and all those who followed him, the aérogénératrices laps however bring significant innovations, both by the number of natural forces and effects used, the diversity of sources of calories considered by many details structure, the device characteristics greenhouses and calories storage system and ultimately by the very superior performance to what can be expected competing projects. These towers are the subject of a patent decision in thirty countries by their two designers: the university researcher Alain Coustou (Lecturer at the University of Bordeaux, a specialist in energy, climate and sustainable development ) and computer scientist Paul Alary (Director collection of the Eons online editions).

According to their proponents, aérogénératrices towers are a promising solution for the mass production of clean, cheap energy.
In countries with nuclear power plants, which could increase at first energy efficiency by significantly increasing the electricity production of a plant without additional fissile material consumption while reducing waste heat and thus make it more acceptable to the population - and totally replace the thermal power plants. The oldest and least safe nuclear power plants could thus be quickly arrested.
In all countries, the aérogénératrices towers can also operate autonomously, using only renewable energy sources, promote or discharges from industrial cooling waters by producing large amounts of electricity, and reducing the passage their thermal impact the environment.
Secondly, they can finally make the final replacement and smooth nuclear and allow mass production and low-cost electrical power totally clean without the use of fuel and no release of greenhouse gases.

In France, power plants contribute little to the drift of the greenhouse effect: in this country, only 5% of electricity is generated by thermal power plants, mainly mobilized at peak consumption hours.
By cons, it is unfortunately absolutely not true globally. They are then more than two thirds of the electrical energy produced by thermal power plants, burning coal, oil or gas. This situation contributes to dramatically strengthen a greenhouse whose consequences threaten to spiral out of control. Moreover the cost of production of electricity from thermal tends to increase with the rise in oil prices, to the detriment of users, whether companies or individuals.

Develop completely non-polluting plants and capable of providing a kW / h at low cost is therefore a fundamental challenge. All the more that hydropower has almost reached its limit, as solar and wind power are both prohibitively expensive and of limited availability at best one third of the day, that biomass can provide an extra. Nuclear is meanwhile discussed because of concerns it raises, especially at the reprocessing of waste and the safety of their long-term storage.
Fortunately there is a solution: The one we propose with the project aérogénératrice tower, which was the subject of the issue of a French patent by the INPI (Patent No. 0408809). After a very favorable preliminary report, the worldwide patent was subsequently granted in January 2007 to thirty countries. We present here the general principles, description, operation, and a number of multiple benefits.

I - General principles:

Use of a shaped hollow structure flared round at the base and optimized to combine four or five natural forces and effects to the massive and ongoing production of electric power at low cost, pollution-free natural resource consumption limited and without being penalized by the irregularity of wind conditions as in the case of wind turbines.
The natural forces and effects used are:
The chimney effect 1-
2- The greenhouse effect
3- The "strength" of Coriolis
The Venturi effect 4-
5- In addition, the wind is likely to provide an extra without ever being required to operate the tower and it is possible to enhance the efficiency and profitability of the plant using low temperatures calories from industry , nuclear power plants, incinerators or geothermal, otherwise in large part needlessly lost.

II - Description of the structure and functions of its different elements:

The detailed descriptions, plans and the text of international patent can be found on the website of the designers of the tower aérogénératrice:
http://groups.msn.com/ToursAerogeneratrices2/
Using the Google search engine (advanced search) also allows you to find numerous references to the towers aérogénératrices (type the complete expression) or to its original designer (Alain Coustou).

A / Optimum dimensions considered:
- Height: 300 meters
- Diameter at the base: 200 meters
- Interior diameter at the top: 25 30 to meters
- Glazing area (greenhouse) around the base of the building: 3 5 to Km2 standalone operation, much less by combining natural forces and effects with industrial cooling calories recovery or from other renewable sources (geothermal).
Smaller dimensions are possible, depending on the available calories and needs, the principle operating effectively to any height at least a hundred meters.

B / description, from base to top:
1) The flared base, which ensures perfect stability at all, is painted black. The vents with shutters are arranged around the periphery of this base are identified and fences to prevent accidental penetration of birds.
Between each input starts a partition. Partitions, which simultaneously have a function of supporting structures, are interrupted in the central part of the tower. They have a shape (plane) curve, to initiate an air rotary motion sucked into the tower rotation that enhances the bottom-up and self-sustaining through the Coriolis force .
2) The base is surrounded by a different nature area, as the building is built or not a region with water.
- By region with water resources, basins to the walls and black background will act on heat reservoirs at night. Each pool may optionally be provided with a floating cover of black color, for controlling evaporation.
- In the dry or desert, a floor surface covered with asphalt or black stained concrete could provide the same functions.
In both cases, the proposed area for the collection of solar calories is more Km2 standalone use and is overlooked very slightly sloped glazing from the center to the periphery and generating a greenhouse. Practically, the greenhouse area depend on the average sunshine and latitude. It could be in the order of 4 Km2 in the south of France for a tour of 300 m.
This land could however be significantly reduced under certain industrial recovery calories or from a nuclear power plant.

3) The diameter of the tower tapers from the base feature which should lead to a considerable acceleration of the upward air flow (a combination of the chimney effect and the Venturi effect).
The upper part of the tower is cylindrical or quasi-cylindrical, optionally slightly conical, preferably painted a light color, for example white.
An energy conversion device of the electrical air column, made up of several stages of turbines or propellers, controlled by sensors and controlled by a computer program, is installed just before the top of the building. This device may be accompanied by a widening of the tower to its level in order to better ensure the evacuation of the air column in spite of the conversion of a significant part of its kinetic energy.
Finally a divergent shroud leaving the turbines would control the disturbance of the airflow at the top of the tower and remove any noise, all extremely annoying little ways, since the top of a tower of optimum dimensions would amount to 300 meters and that the airflow is directed towards the sky. Also, if the tower is located near a nuclear power plant, it will have no residents, given the buildable area that will surround it. When the danger to air traffic, there would be zero, given that central settlement areas are prohibited overflight. The presence of a plume rising air even participate in securing the neighboring plant.

III - Operation:

Greenhouse effect :
The air around the foot of the tower, of course generally warmer than the top is raised in temperature through the greenhouse effect afforded by the glass surfaces.
1) A reserve of calories is made using the heating of the soil or asphalt covered with concrete dyed black or better yet, octagonal or quadrangular pools. Diurnal storage of calories is indeed much higher in the case of basins that it is in the case of bitumen or concrete. These basins are themselves black in color and may be covered with a floating cover rigid or semi-rigid black tint that allows the absorption of solar heat. This device would be useful only if it was deemed necessary to reduce the evaporation of the pool water, or to save, or to limit any condensation on top of the tower.
For the same reason, the flared base of the tower can itself be painted black and insulated glazing over the entire part where the slope is less than 45 °.
The black area of ​​absorption and calorie reserves around the base of the building - or in standalone operation, an area of ​​some Km2 concrete, asphalt or better basins - are dominated by glazing in which circulates the air that is heated before being drawn by the tower.

2) The glazing area is encircled by a flap system managed electronically to optimize the use of air heated by low and moderate wind. The operation of these components would avoid any risk of excess pressure that could result from strong winds. It would also further improve the efficiency of the tower.

3) The implantation of the tower at the site of a nuclear or thermal power station would allow the use of heat from the water of the central cooling circuit, transmitted to the tertiary circuit. The water would be diverted to the latter under the tower or to the outdoor pools in the tower, from or closer to the base or further away depending on the constraints related to the need to maintain the thermodynamic efficiency of the plant . May be considered either to cascading water tertiary circuit in the base of the tower (as in the current cooling towers) or above outdoor ponds or misting the above these basins is to circulate water in the secondary circuit in networks of fine lines placed in the basins to directly transmit the heat to the water thereof. Whatever the method chosen, the proposed system would fill at this level which is currently one of the cooling towers and the base of the tower and the area immediately adjacent greenhouses would act calories transmission area. We are considering various configurations for this transmission. As we said above, the configuration chosen should obviously protect the thermodynamic efficiency of the plant whose calories are recovered. The experience and expertise of the engineers who worked on conventional cooling towers would ensure the optimization of the system proposed here.
This would have the dual benefit of significantly reducing greenhouse area and limit discharges of warm water in nature. Also this location tours should allow considerable lowering of the cost of the KW / h could be reduced by a factor 2 or more depending on the prior availability of land, substations and lines very high voltage, some personnel costs can also be shared with the power plant. Finally, the use of hot effluent plants would both reduce the water taking in river or sea - currently of around 50 cubic meters per second for each cooling tower - to limit releases of warm waters in these rivers or the sea and make unnecessary conventional cooling towers. So far, the water discharged after passing through the cooling towers of nuclear power plants are still warmer than when they levy of 15 ° C for discards and 12 ° C for discharges river. The solution to the implementation of aérogénératrices towers in addition to nuclear power plants is likely to greatly enhance the preservation of the environment while ensuring a cost of kW / h particularly low (probably of the order of 2 cents euros the kW / h, against 3,5 for nuclear power and to 10 12 for wind turbines) and ensuring the conditions for sustainable development.
So while the nuclear power plant unit (or thermal) + towers aérogénératrices who would see their improved performance.

But that's not all.
In the case of the availability of a sufficient flow of relatively high temperature effluents, misting of part or all of the water directly into the air under the base of the tower and / or above the storage ponds calories would be likely to improve the transmission of the latter with the air sucked through the tower. Moreover, this charge air humidity increase the energy of the artificial tornado generated in the aérogénératrice turn, but at the cost of a probable and harmless condensation on top of the tower.
Similarly, it is possible to use a thermal source, geothermal energy or calories from industry (steel, foundries, cement, incinerators ...) to feed the basins with almost the same advantages in terms of warm water and the base of the tower. The principle of aérogénératrice turn being valid for sizes from 100 300 meters to meters or more, it is possible to adapt the choice of dimensions of the tower to the importance of recoverable calories, not counting again solar calories and storing them in the basins.

B / Combining the chimney effect of the Coriolis force and the Venturi effect:

1) Effect fireplace
Hot air trapped under the glass surface and under the flared base of the tower ascends in the hollow structure by stack effect.
This well-known phenomenon is not sufficient in itself to ensure adequate effectiveness of the device for a tower whose height is limited to 300 meters. If it was limited to only effect fireplace, then it would tower to 500 1000 meters high, such as in solar tower construction projects in Spain and Australia, posing serious construction problems. And even ! The rate of climb of the air column could best achieve that sixty kilometers / hour and the performance of the whole would be poorer ...
This is where the very special architecture aérogénératrice turn, resulting in maximizing the energy produced to take advantage of two complementary natural forces.

2) Force (or effect) of Coriolis
The air that enters the base of the tower is guided by curved walls that initiate its rotation. These partitions, which arise between each air entry bay, also exert a supporting structure function. The central core of the tower ensures the symmetry of the rotation of the rising air.
Thus was initiated a whirlwind phenomenon, maintained and amplified by the Coriolis effect, this "strength" natural which is causing the rotation of cyclones and atmospheric whirlwinds. We obtain a captive and self-sustained tornado. The hot air is no longer content to ride but is driven by a rapid rotational movement in the same direction as that for the turbine stages.
Besides a significant extra kinetic energy thus communicated to the latter, this rotation of the rising air column can increase the number of revolutions / minute turbines without increasing its speed relative to the environment. This last point is an important additional aerodynamic advantage for the solution of aérogénératrices towers.

- The "strength" of Coriolis is a consequence of the rotation of the earth. In the northern hemisphere, it tends to deflect air masses moving to the right and prints their rotational movement. In nature, this phenomenon is particularly causing the rotation of cyclones and tornadoes. As there is reversal of the direction of rotation in the Southern Hemisphere, the Coriolis force is weakening, approaching the equator, at which it vanishes. For cons, the greenhouse effect is maximum around aérogénératrices towers in the tropics, there are offsetting the weakness of the Coriolis effect in this part of the globe.

3) Venturi Effect
The special architecture of the tower, flared at the base and the inner diameter narrows gradually as the air rises through chimney effect, leads to a considerable acceleration of the upward air flow and rotation by the Venturi effect (the same effect that makes the current of a river slowly accelerates when its bed narrows). With an inner diameter in the upper part of the tower to the equal 1 / 7ème of that of the base, and a temperature difference of thirty degrees, the speed of the air column would be several hundred Km / h . It will only be necessary to prevent this speed far exceeds mach 0,7 because, beyond, one would arrive at a transonic area asking control problems of flow and resistance of turbine blades of 25 meters in diameter.
Thus the energy carried by the column of air is considerably increased compared to what would be obtained by simple stack effect in a tubular structure and a constant diameter from the base to the top.

The calculation of the Venturi effect is extremely simple: between the base and the top speed of the air flow is multiplied by a coefficient equal to the ratio inner surface of the tower to its base / inner surface at the top. For a ratio of diameters equal to 7, the area ratio is equal to 49. By deducting the area occupied by the core, the half walls curves of the base and fasteners train turbines, it passes about 50. Therefore, a rising speed at the base of only 10 Km / h results in a potential speed of 500 Km / h at the narrowest level at the base of the turbines. We must of course take into account other parameters: availability of much higher speeds by increasing the temperature differential between the base and the summit, kinetic energy supplement to the rotation of the air column, presence of the turbines for the capture of kinetic energy, potential use of compressors and discharge valves, etc.

C / The conversion of the kinetic energy of the air column into electrical energy:
The energy of the captive air waterspout and self-sustaining is collected in the upper part of the tower by a series of turbines or propellers, the whole being designed not to "stifle" the rising air column. The turbines are managed through sensors (recording speed of air flow and rotation of turbines) and to a specific computer program. Extended to the base of the tower, the central core of the turbine train can also help support the weight of it and allow the passage of cables or an internal lift. Also, being located in the axis of the "eye" of the artificial cyclone, it helps to ensure symmetry without braking the rotation of the air column.
It is reasonable to expect that more than 75% of the kinetic energy and be converted into electricity, the remainder corresponding to losses of unavoidable load or being for self-maintenance whirlwind phenomenon. Without reaching because of this performance steam turbines or hydraulic turbines (of about 90% depending on the type of installation), the yield is higher than that which can be theoretically obtained from a wind turbine, Limited by the "Betz law" which demonstrates that a wind turbine not faired single rotor and a horizontal axis will never be converted into mechanical energy over 59% of the kinetic energy of the incident wind. The structure of the tower, the forced acceleration of the air stream, the use of multiple turbine stages and a combination of natural forces and effects as well as heat recovery can overcome this constraint.
In any case, even if the "law of Betz" applied to a simplified tower with only one turbine, it would lead to an available power over 4000 times that of a wind turbine of the same diameter as the turbine, the air speed differential between the two solutions being of about 16 and the available power depending on the speed of air at 3 power (double speed = 8 times more power, speed times = 16 4096 times more power). Aérogénératrice between the tower and conventional wind turbines, there are makes a difference comparable to that between a jet and light propeller planes. The internal architecture of the tower is moreover obvious similarities with that of a turbojet.
The production of electricity thus obtained is permanent. In particular, it is almost independent of wind, unlike conventional wind turbines. Any fluctuations can hardly come as variations in the gap between the air temperature at the base and top of the tower.
The system operating in heat build-up, even in the case of a purely solar operation, heat can be accumulated during the day and night used to generate electricity.
The installed power could be several hundred megawatts: the order of 500 700 MW in standalone operation with thirty degrees of difference between the air base and the summit, more than 1000 MW in the case a location near a nuclear power plant or the calories which would be recovered effluent from the cooling circuit.
Or those calories now partly dissipated unnecessarily in nature by plants are not negligible. We give here the example of the Swiss nuclear power plant Gösgen, slightly less powerful than the last plants built in France. The cooling tower of this central continuously ejects a power-heat over 2 million kWh in the lower atmosphere, or the annual equivalent of 17 billion kWh. Or it is lost energy after cooling tower.
The recovery of calories from the secondary circuit of such a plant could hope to achieve power at least 1000 MW or more for each aérogénératrice tower and adjoining that of a nuclear reactor. It should simply avoid degradation of the thermal efficiency of the power generation unit coupled to the power plant, which should present no difficulty.

IV - A few bonuses:

Towers Aérogénératrices by their height (in the order of meters for 300 the optimum size) and their architecture (a quasi-cylindrical upper part above a flared base) can further uses, providing additional utility not negligible to further increase profitability. Here are a few :
Circular maintenance platform near the top, could be used as post fire monitoring in forest areas.
Antennas, transmitters and repeaters: radio, television, mobile telephony, etc. The transmitting antennas benefit from the height of the building to have a greater operating range and would present no risk to the population.
In regions at regular wind conditions, the wind of annular rings encircling almost cylindrical portion of the tower (that would serve their vertical axis) bring an energy bonus most cost although that is produced by a conventional wind turbine: the altitude of the "free pylon" constituted by the turn ensure greater stability of the flow of wind, unperturbed by the relief of the ground.

First, generating couple towers and nuclear power plants would significantly improve the performance of each other like while allowing the immediate cessation of certain reactors. This would also happen more easily thermal power plants (two-thirds of global electricity production increasing steadily, lest we forget!), And give a serious boost to French economic growth, European and global - hence employment - and the protection of nature.
Furthermore, the expertise of companies already engaged in the production of conventional electricity, nuclear or wind should wonder regarding the development, construction and management of aérogénératrices towers. A chance for those who will engage in this new energy revolution, to acquire or maintain a leading position in the world regarding energy, while enhancing their brand image.
Later, when to stop power generation of nuclear power plants have reached the end of life, the aérogénératrices towers will be there to take over, without drama and without social economic problem. It will suffice, or to extend the collector area of ​​solar calories (greenhouses) or to promote the establishment near low calories recoverable generating activities, or possibly keep the reactors at the plant and operate it in slowed only as a generator of heat low calorie (not boiling water) to supply several laps. As for countries that do not have nuclear power plants, they will always be used under the same conditions calories lost by thermal power plants - and thus avoid having to build new plants - and solar calories, useful industrial or geothermal operation tricks.
The "Tours Aérogénératrices" solution is indeed a universal solution. And as noted by one of the engineers who was subjected to the project expertise, it could well be "the invention of the century" and the beginning of "a new economic revolution."

In conclusion, aérogénératrices tours are the perfect solution to all points of view. Not only will they generate electricity in bulk and at a particularly low cost, but they will ensure sustainable development using no fossil fuel. The environmental hazard of aérogénératrices towers is zero. The tornado captive can not escape because ceding most of his energy to the turbines. Moreover, the device does not emit any gas, minimizing damage to the environment.
All reasons that should push for a quick decision in favor of development towers aérogénératrices, first by the construction of an evaluation model, possibly in the form of a simplified and relatively inexpensive modular structure and by setting started an ambitious program of construction in France and in the world.

Alain Coustou - 13-06-2007


PS: The invention is the subject of an international patent, protecting France and in thirty countries in Europe, Asia and North America.
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Unread Messageby elephant » 30/06/07, 14:07

Thank you for this excellent article.

You know or is the proposed tower 1 km high of Australians? I believe that building permits were issued in 2006?
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Unread Messageby Willaupuis » 30/06/07, 21:09

uh I'll probably say something stupid but hey it itches mind in "re" read the article. my crazy idea:

pourrait'on enjoy a mountain to create the same effect by digging a vertical tunnel to have a similar effect :?:
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Unread Messageby elephant » 30/06/07, 22:54

Why not ? But I am afraid that is difficult. Tough to make a career in rock :D

(Plus you get all ecologists from the corner that go bitching PCQ you're going to damage their beautiful mountain. Forget! : Mrgreen: )
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Unread Messageby Christophe » 01/07/07, 12:37

Last edited by Christophe the 19 / 05 / 08, 09: 43, 4 edited once.
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Unread Messageby Christophe » 01/07/07, 12:40

I take this opportunity to share with you another document on solar towers (the idea is not new at all) in particular about the work of Edgar Nazar in 60 years 80

https://www.econologie.com/tour-solaire- ... -3493.html

I quote:

This so-called aero tower or central vortex today (Atmospheric Vortex Engine), whose principle is based on the domestication of ascension or mini cyclone vortex, must be distinguished from simple solar chimneys (upwind single flow system) which has been much talked about (Australian tower project 1000 m in particular), but the yield is much lower, and profitability, doubtful.


The power plant Experimental aerothermal venturi shaped that wanted to build Nazare has a height and a base diameter of 300 m, a venturi neck diameter of 30 m and to a temperature difference (delta T) of 30 ° C between the high and low layers of the atmosphere , an electric power 200 MW (megawatts) about.


To date, the only known embodiment of solar chimney Manzanares is that of Spain. This experimental tower built in 1982 by the German engineering office Schlaich Bergermann & Partners is composed of a cylindrical chimney 200 m high of 10 m in diameter, at the center of a circular solar collector 250 m diameter ( 6000 m2 glazing to 2 m above the ground) and for heating the air.
Its power is 50 KW.


Or what is the solution that is being developed? The more crap ... : Evil: : Evil: : Evil:
Last edited by Christophe the 05 / 10 / 07, 12: 50, 1 edited once.
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Unread Messageby Alain Coustou » 06/07/07, 01:40

elephant wrote:Thank you for this excellent article.
You know or is the proposed tower 1 km high of Australians? I believe that building permits were issued in 2006?


Thanks for the compliment.
The German-Australian project Enviromission was lowered and plans are being redone for a round of 500 m of concrete, with reduced production capacity of 80% compared to the initial project, technically peninsula unachievable. The construction is extended to 2010 according to my information, and the tower would produce only 40 000 Mw (against 200 000 for a solar tower 1000 m).

The project engineer Henri Edgard Nazare is in fact the ancestor of all projects vortex towers.
Compared to the vortex turn Coustou-Alary, however it had many shortcomings. Currently, the company that inherited plans Nazare (the Sumatel), testing a model 60 m the geothermal site Boiling the Caribbean. The goal is to contruire tower 300 m (almost all projects vortex towers seem to converge towards this height considered optimal), the upper half would have the form of a Laval nozzle (rocket nozzle) and which leave permanent tornado to 10 20 km height, the purpose would be to draw air from the tower and thus turn the turbines placed at the periphery of its base. The structure of Nazare Sumatel-round is very exact, that of Coustou-Alary tower and security is much more problematic. I tried to draw the attention of the founder of Sumatel on the risk created by the tornado tower spiraling out of control (I am not the only one), but it is its idea.
As against this risk is totally non-existent in a tower like the one I developed with Alary and a small team of engineers. The energy of the tornado is largely absorbed by turbines placed in the upper part (the slower the air column is offset by the widening of the upper fairing) and, in addition, a double ring of flaps control the admission of air to the base of the tower and around greenhouses.

To answer the suggestion Willaupuis (a device dug into a hill or mountain side), be assured, it is not at all stupid! There have indeed been such projects, but it would pose huge problems for optimum geometry.

Alain Coustou
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Unread Messageby Christophe » 06/07/07, 10:52

Alain Coustou wrote:the tower would produce only 40 000 Mw (against 200 000 for a solar tower 1000 m).


Uh this is not quite 40 Mw? Because 40 Gw ca seems to me much ...

Alain Coustou wrote:which would leave a permanent tornado to 10 20 km height, the purpose would be to draw air from the tower and thereby rotate turbines placed at the periphery of the base.


Wow ... tornado fe 10 high of 20km not generated a "small" tower 300m! : Shock:

How is it possible to generate as much energy? There is an amplification phenomenon?
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Unread Messageby Alain Coustou » 06/07/07, 16:46

Christophe wrote:
Alain Coustou wrote:the tower would produce only 40 000 Mw (against 200 000 for a solar tower 1000 m).

Uh this is not quite 40 Mw? Because 40 Gw ca seems to me much ...
Alain Coustou wrote:which would leave a permanent tornado to 10 20 km height, the purpose would be to draw air from the tower and thereby rotate turbines placed at the periphery of the base.

Wow ... tornado fe 10 high of 20km not generated a "small" tower 300m! : Shock:
How is it possible to generate as much energy? There is an amplification phenomenon?


Oops ... Of course, it was a slip. This is obviously 40 Mw.
For Nazare Sumatel-round engineers Sumatel rely on a priming effect of the tornado by air exiting rotation of the upper half shaped Laval nozzle. For them, there is extension "virtual" appearance of the tower and a real and massive tornado that nature will take care itself to amplify and perpetuate.
Needless to say that I remain very skeptical and that if such a thing happened, I do not think it devoid of danger. The tornado could be separated from the tower and destroy neighboring areas before choking. Or worse, it could swell and cover the tower itself.
It must be said however that Sumatel not only rely on the suction effect of a tornado and thrown. Michaud Canadian had developed thirty years ago an even more "crazy" project, with the air of rotation in an even broader structure and much more wide open to the sky, but Venturi effect. However, the project did not lead to experimentation, unlike Nazare towers (a model of 6 meters was tested in France by the Sumatel, but of course without external appearance of a tornado, the possibility remains unproven ) and aérogénératrices towers, the two engineers who work with me have tested an experimental model of 3 meter heated at the base by a gas manifold.
In any case, even if the energy supplement "vertical" mentioned by the Coriolis effect was negligible, it will not be the same of its rotational component, which will significantly improve the performance of the turbine tower aérogénératrice. And for this, no need to blurt out the "tornado" of the structure ...

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Unread Messageby elephant » 06/07/07, 18:55

And aside from the risk (as with any large building) to see crash a plane above, what are the risks to aviation? Does there not a risk of seeing a micro climate? Or average altitude disturbances?
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