NL1023999C1 - Improved vertical axis water turbine, called hydro-turby. - Google Patents

Description

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IMPROVED VERTICAL AS WATER TURBINE, MENTED HYDRO-TURBY

The present invention relates to a device for converting flow energy into liquid such as, for example, water into electrical energy, the device being called a water turbine or Hydro-Turby, the water flow exerting forces on the helical blades with a wing-shaped cross-section, which are arranged at a radial distance from a vertically placed shaft, whereby said central shaft is set in rotation and thereby drives an electric generator.

In the development of the further improved vertical axis wind turbine (VAWT), called the TURBY, the idea has emerged that said wind turbine to be used in an air stream should also be usable with liquid adjustments in which the density of the liquid, is much larger than that of air, while under normal circumstances the flow velocity is lower, so that the energy or power supply is almost in the same order of magnitude, so that the flow conditions and the occurring lifting forces are similar in nature and magnitude.

25 The applicant's TURBY is therefore the

European Patent Application number 020 79 432.7, DIXI Holding bv, Heuvelenweg 18, 7241 HZ LOCHEM, The Netherlands and the inventors SIDLER, Hendrikus, Antonius, Heuvelenweg 18, 7241 HZ LOCHEM and SIDLER, Martines, Antonius, Watherus, 30 Achterom 63, 3995 EK WOOD, with suitable specific or inventive adjustments in running water, can be used efficiently for this purpose.

•; f023999 I -2- I In formula form, the power of a wind or I water turbine in a flow field is: I Pw ~ Η.η.ρ.ν3 .A. [w] I Of which: I p »density of the medium [kg / ms] IV = wind speed [m / s] A = surface considered perpendicular to the wind or direction of flow I η = aerodynamic or hydrodynamic efficiency I When placing in a water stream the p (rho) is approximately 100x greater than that of air and the speed v is approximately 10% of the usual air speed, so that the I power remains approximately equal at the same mill dimensions. As with the wind turbine, a special low-speed generator converts the energy of the rotating H axis into electrical energy.

20 The Norwegian company Hammerfest Strem makes use of converted horizontal-axis wind turbines, which are used at suitable depth for the purpose of shipping in fjords as elements for a tidal power station.

Adhering to the known wind to water turbines 25 thus converted in respect of the fact that the mill must always rotate from ebb to flood through 180 degrees, as a result of which the electric voltage cables start to twist or twist, because the turbine generates electrical power around a horizontal axis and the mill from ebb to flood must turn an angle of 180 ° around a vertical axis. In addition, the turbine is far above the bottom of the water flow, so that long cables are required to first connect to the bottom of the flow channel and then over or into the bottom to the shore to be subsequently connected to an electricity station. With the water turbine, or the present Hydro-Turby solution according to the invention, the turbine can for instance be placed directly on the bottom of the flow channel, whereby the cabling becomes much less vulnerable due to direct placement or location on or in the substrate of the flow channel. The known water turbines also have the drawback that they cannot be used in the same way as the Turby in small shallow currents and in small sea arms and bays.

Furthermore, with the known water turbines, seasoning is required, for which sensitive parts are required which are located in an aggressive environment. In short, placing the known horizontal axis mill turbines in a water or liquid stream has a number of drawbacks in practice.

The object of the present invention is to develop such a water turbine, which is applicable in shallow water, in smaller flow channels and in fairways so deep that passing ships are not hindered or can cause damage, whereby the water or liquid flow exerts forces on vertical arranged helical blades with wing-shaped cross-section of a vertical axis turbine with elevator rotor, which blades are arranged at a radial distance from a vertical central axis of rotation, said vertical central axis of rotation driving a generator and to which the aforementioned drawbacks do not arise.

To this end, a device for converting flow energy from a liquid stream into electrical power has been developed in a very inventive manner such that said water turbine has at least one vertically shaped rotor body, built up substantially radially R of said central vertical axis of rotation 1023999 Η

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several helical blades tangentially arranged with I

wing-shaped cross-section over a height H and thus I

said rotor body, the rotational speed w I

of the central axis of rotation due to the shape and dimensions of the I

5 helical blades with wing-shaped cross section and the I

flow rate V of the water by means of the so-called I

rapidity λ are matched to each other according to λ = I

w.R / V, said helical blades having I

wing-shaped cross section of a strong, bend-resistant and I

Corrosion-resistant material has been manufactured, wherein I

said electric generator is a low-speed type, I

wherein said rotor body can be surrounded by an I

flowable mesh-shaped cage construction with an I

mesh size of BxB. I

The advantage is a powerful and especially constant I

working water turbine, which causes little inconvenience to the I

shipping, which is not visible and therefore not visual I

nuisance or horizon pollution and that at relative I

easy to place in liquid flows. I

Said places can be placed on a concrete slab at the bottom of the I

take place on a river, or on a cable above the I

water surface or at the bottom of a bridge girder and the like I

Furthermore, the device according to the invention is I

further developed such that the I

25 cross-section of said helical blades with I

wing-shaped cross-section an improved or modified I

NACA profile and that the number of helical blades is I

is odd and can be 3, 5, etc. I

The benefits are a very even course in the I

30 fluid flow and the possibility to adjust the I

rotation speed of the turbine to the flow speed of I

the liquid by adjusting the number of blades. I

I 1023999

The device according to the invention is then further developed, characterized in that said flowable mesh-shaped cage structure has the shape of a pillar cross-section with a mesh width B of approximately 5.10 m, wherein the choice of material can be a reinforcement net for concrete structures and can have the pillar shape.

The advantage is that no larger floating or floating objects can get into the flow mill or water turbine.

The invention is explained in more detail below with reference to a preferred embodiment shown in the drawing.

Hereby shows:

Pig. 1 shows a side view or approach view in skewed projection of the adapted water turbine which can be placed on a concrete bottom plate, in accordance with a preferred embodiment of the invention;

FIG. 2 the same as figure 1 but then placed on a larger concrete slab, wherein the water turbine according to the invention is also provided with diffusers for enhancing the liquid flow;

FIG. 3 shows an approach view in oblique projection of a series of vertically coupled water turbines 25 suspended from a support cable in or above flowing water according to the invention;

FIG. 4 water turbines coupled horizontally; and

FIG. 5 is a graphical representation of the relationship between the vector flow rate of the liquid and the vector indicating the direction and speed of rotation of the water turbine, the ratio indicating the rapidity λ.

1023999

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Figure 1 is a side or approach view and I

crooked projection the water turbine 1, called Hydro-Turby, I

according to a preferred embodiment of the I

5 the invention. The water turbine 1 here has an I

vertical axis of rotation 2, which drives a generator 3, I

after which the generated electrical energy via a cable 4 I

to the user or the electricity grid. I

The water turbine 1 can be mounted on I with the generator

10 a concrete block 5, which is on the bottom 6 of a flowing water 7

is placed. The cable 4 can pass over or into said bottom 6 l

to be applied. The top 9 of the water turbine can I

at a depth D, possibly adjusted to the draft of I

ships. The wing-shaped blades 10 I

15 rotate at a constant distance R as a Darrieus or I

lift or aerodynamic rotor with a fast running speed λ> I

2 about the axis of rotation 2 and thus drives the generator 3. I

The wing-shaped blades 10 have an I over the height H

rotation, and the constant distance R is maintained I

20 by means of slender spoke profiles 11, which are wing-shaped I

have a cross section. The upper and lower I

spoke profiles 12 again have a wing-shaped I

cross section. The height of the water turbine 1 is Η, I

wherein lengths suitable for R, H and D are always selected I

25 for a specific application. I

In figure 2 the same water turbine 1 as in figure 1 is I

placed between two diffusers 13, the I

cross-section can take various forms, such as I

circles, ellipses and the like. By using diffusors I

30 there is a concentrated or increased flow rate of 71 l

occur around the water turbine 1 in the direction of rotation 14 on I

to float. Incidentally, the same parts have the same I

display numbers. I

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Figure 3 shows an oblique view in oblique projection, in which three water turbines with vertical axis of rotation 2 are coupled to each other and are suspended from a support cable 15 and provided with a weight 16 or another manner of anchoring on the underside. The output cable 17 for the generated electrical power can now be attached to said support cable 15 and both cables can be below or above the water surface 8, depending on the wishes of the owner.

Figure 4 shows water turbines 1 that are horizontally coupled to a support cable 18, wherein the cable is placed in flowing water in the same way as in Figure 3, namely in or above the water level 8. The drain cables 19, 20, 21 can be mutually coupled become a resulting power cable 22.

The underside of the water turbines 1 are weighted 23. The water flow 7111 ensures the rotation 24 of the rotation shafts 2 of the water turbines 1. The generators 3 are connected to the support cable 18 by means of a rotation-proof connection 25.

Figure 5 shows a graphical representation of the mutual relationship between the vectors of the surface water flow rate 26 (Vw) and the rotation speed 27 (X.Vw) of the water turbine 1, where λ is the so-called fast-running. The rapidity λ is equal to the quotient of the blade speed of the water turbine and the flow rate of the water.

Finally, it should be explicitly stated that the preferred embodiment has been described above and that further modifications are possible without departing from the scope of this patent.

1023999

Claims (8)

8. I CONCLUSIONS I Device for converting flow energy into liquid such as, for example, water into electrical energy, wherein the device is called water turbine or Hydro-Turby, wherein the water flow exerts forces on the vertically arranged helical blades with wing-shaped I cross-section, are arranged at a radial distance from a vertically arranged axis, whereby the central axis mentioned is rotated and thereby drives an electric generator, characterized in that said water turbine (1) has at least one vertically shaped I rotor body , built up from radially spaced R of said central vertical axis of rotation (2), substantially vertically arranged, multiple helical blades with wing-shaped cross-section (10) over a height H and thus forming said rotor body according to the principle of the vertical axis turbine with lift motor, where I is the rotational speed w of the center r axis of rotation (2) by I shape and dimensions of the helical blades with I wing-shaped cross-section (10) and the flow velocity VI of the water are matched to I by the so-called rapidity λ according to the formula λ = wR / V, where I mentioned helical blades with wing-shaped cross-section (10) are made of a strong, bend-resistant and corrosion-resistant material, wherein said electric generator (3) is a low-speed type, wherein said rotor body can be surrounded by a flow-through mesh-like cage construction with a I 30 mesh size of BxB. I Device according to claim 1, characterized in that the cross-section of said helical blades with wing-shaped cross-section (10) is an improved or adapted NACA profile. Device according to claims 1 and 2, characterized in that the number of helical blades with wing-shaped cross-section (10) is odd and can be 3, 5, etc. The device according to claim 1, characterized in that said rapidity λ is greater than 2. Device as claimed in claim 1, characterized in that said values for R and H of a single water turbine (1) can be approximately 1.00 and 2.00 m, wherein in a vertical sense according to the water depth a stack of said water turbines can take place, whereby a generator (3) can be driven more powerfully. Device according to claim 1, characterized in that said corrosion-resistant material is a stainless steel type. 7. Device as claimed in claim 1, characterized in that said corrosion-resistant material is a bend-resistant and strong composite construction. 8. Device as claimed in claim 1, characterized in that said flowable mesh-like cage construction has the shape of a pillar cross-section with a mesh width B of approximately 0.10 m, wherein the choice of material can be a reinforcement net for concrete structures and can have the pillar shape. 30 = / = 7023999