TITLE: WIND TURBINE OF CYLINDRICAL SHAPE WITH FIXED OBLIQUE OUTER CHANNELS AND VERTICAL INNER BLADE FOR THE PRODUCTION OF ELECTRIC CURRENT FROM THE WIND

It is a cylindrical wind turbine, with an internal vertical axis (5) drawing I, and adapted blades (3) drawing III above it in full height per floor, producing electric current from the wind in large dimensions with quite a fairly large frontal surface and fairly large yields. DRAWING I shows the top view of the wind turbine with the fixed channels (1), the supports (12) on the outer periphery (18), the inner periphery (17) with the blade (3) on a vertical axis (5) and the air flow (2). DRAWING II shows the vertical section of the wind turbine with the central vertical axis (5) and the blade (3), the floors (8) and the foundation as well as the generator (9) and the tapered bearing (6). The third DRAWING III shows a detail of the central axis (5) on one floor with the blades (3) and mounting grid (4)

DISADVANTAGES OF EXISTING WIND TURBINES i. Constructions with a specific height and diameter of the blade, small frontal surface and at high wind speeds unstable and inefficient due to idle rotation ii. Blade rotation speed proportional to the wind speed. Starting speed Ven.>7m/sec while after lOOkm/h idle rotation under the fear of blade breakage iii. High-tech construction, difficult to maintain and with a finite operating time iv. Sensitive constructions in the rotation of the blade v. Small returns with high cost and slow payback

DESCRIPTION: The present wind turbine has a cylindrical shape, drawing I, which is also the top view of the wind turbine consisting of two concentric circles: the outer (18) and the inner (17). Between the two peripheries are the oblique channels - walls (1), straight or curved, made of reinforced concrete of thickness and length according to the size of the wind turbine and supports (12) on the outer periphery that function like a funnel according to the BERNOULLI’S principle, i.e. the air enters through a large orifice (13)-(14) and exits through a small orifice (15)-(16) resulting in the increase of the airspeed. The construction will take place in floors (8) drawing II. At the ends of the channels- walls (1) DRAWING I, and at the points of contact with the inner circle (17) an electric curtain will be constructed that will rise and fall at the ends of the channels, depending on whether we want the wind turbine to work or not. The foundation will be done in depth depending on the static study.

At the base of the foundation, a large, tapered bearing (6) drawing II, will be placed in the centre of the concentric circles, with automatic greasing, where the vertical axis (5) will rotate with the blade (3), drawing III. Above and perpendicular to the axis will be fixed a large gear (7) drawing II, with a belt that will transmit the rotational movement of the axis to a generator (9) drawing II, while above and parallel to this disc will be fixed a second disc, larger and heavier peripherally (10) drawing II, which will be used for braking the axis and as a flywheel. It can also be fitted with an automatic gearbox, as in automatic cars, where, depending on the torque force of the axis, the rotation is transmitted to a corresponding generator.

The axis (5) of the blade (3) drawing II, is vertical, rests above the bearing (6) and extends up to the top floor. On each floor it shall be supported by hollow sections with bearings fixed to the slab of each floor horizontally with a corresponding bearing. On each floor and on the axis, drawing III, the blades (3) shall be fixed with a network of hollow sections (4). The blade (3) drawing III has a semi-circular or other semielliptical shape, depending on the study, is parallel to the axis and is fixed over the network (4) drawing III. The inner circle (17) drawing III on each floor slab, where the blade (3) drawing III rotates, shall be empty, so that the rotating air masses of the blade can swirl and rise from one floor to another as an artificial tornado, except for the roof of the basement which shall be a fully reinforced slab to protect the mechanical equipment from rain, snowfall, etc. The ending (1 1) drawing II, on the top floor will also be open to allow the air masses to escape. In the event of snowfall and ice formation on the walls of the channels-walls (1) drawing I, ceilings and floors, they will be lined with galvanised sheet metal at a distance of 10 cm from the surfaces, so that an electrical resistor can be installed internally for heating and defrosting. The electrical energy will be supplied for consumption and there will be batteries to store part of the energy for the needs of the wind turbine.

ADVANTAGES OF THE WIND TURBINE i. Stable construction made of reinforced concrete and due to its symmetry and earthquake resistance, resistant to time and any wind speed and with a large frontal surface. ii. Wind speed increase n-times of wind speed (input (13)-(14) and output (15)- (16)) according to BERNOULLI’S principle iii. Exploitation of low speeds due to the increase in speed and exploitation of high speeds iv. Creation of an artificial tornado inside the wind turbine due to the rotation of the air masses v. Simple construction without high technology with simple maintenance and durability vi. Operation with any wind direction

Furthermore, I could say that there are no disadvantages to this construction and that with a few hundred of these wind turbines, part of a country’s energy problem can be solved. Wind energy is abundant, a gift of nature, soft, inexhaustible and clean. There will be growth in agriculture with the construction of greenhouses, seawater desalination plants for drinking water for the islands and wherever else needed, residential heating-cooling and a host of other applications.

NOTE (numbering for description, summary, claims, drawings) (T) REINFORCED CONCRETE CHANNELS - WALLS

@ WIND DIRECTION

© SEMI-CIRCULAR - CURVED BLADE

© BLADE SUSPENSION NETWORK

@ VERTICAL ROTATION AXIS

@ TAPERED BEARING

© TOOTHED GEAR OR TRANSMISSION BELT OF THE MOVEMENT TO THE GENERATOR

© WIND TURBINE FLOORS

© GENERATOR

@) BRAKE DISC - FLYWHEEL

@ ENDING OF FLOORS

© SUPPORTS IN THE PERIPHERY

© INNER CIRCLE PERIPHERY

® OUTER CIRCLE PERIPHERY