• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    System and method for obtaining energy from a fluid comprising a vortex generator, within a fluid, composed of at least one obstructing body (2) and a cantilever lever (1) that deforms at its free end, anchored to the obstructing body (2). The vortex generator oscillates with the aid of an element that promotes the von karman vortex street (3), which can be placed upstream or downstream of the vortex generator, which can be attached to the obstructing body (2) or not, always in order to favor oscillation by increasing the drag coefficient of said obstructing body (2). The conversion of mechanical energy into electrical energy is carried out with an electric generator (18) where the rotational movement is achieved from transmission elements that transform said oscillation into rotation. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2578428A1
    申请号:ES201530090
    申请日:2015-01-23
    公开日:2016-07-26
    发明作者:Carlos MEDRANO SÁNCHEZ；Nuria LIÉDANA PÉREZ
    申请人:Carlos MEDRANO SÁNCHEZ；
    IPC主号:
    专利说明:

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    of von Karman vortex streets downstream of obstructing bodies, by introducing elements added to said obstructing bodies that disrupt the formation of detached vortices (US 6695540 B1, US 5517865 A, US 7905153 B2). Although another strategy to break the vortices downstream of an obstructive element is the introduction of elements that provide an aerodynamic shape to the obstructing body, so as to avoid the separation of the flow and that this can continue as laminar (US 7628569 B2).
    In addition to providing more aerodynamic shapes to the elements that produce von Karman vortex streets to prevent their formation, another strategy is used based on the introduction of elements that make the boundary layer become turbulent before separating from the obstructing body. This proposal has been applied in golf balls that have holes in their surface to create a thin turbulent layer near the surface of the ball that postpones the separation of the flow of the ball thus improving the aerodynamic behavior of the ball, by drag force reduction. This mechanism of action is found in patents EP0033023 and CA2131481.
    The techniques, which make an element more aerodynamic, or postpone the separation of the boundary layer of an object by the introduction of roughness on its surface, are undesirable when the objective is to create a street of vortices of von Karman Therefore, it can be favored for an object to enter into resonance by designing the obstructive element in a manner contrary to that proposed in patents dedicated to avoiding von Karman's vortex streets.
    The drag coefficient (parameter that determines the aerodynamic resistance of an object) for a cylinder is 0.49 while for an aerodynamic body with the shape of the wings of an airplane is 0.09. Theoretically, if it is possible to increase the drag coefficient above the value of the cylinder, it is possible to anticipate the separation of the laminar boundary layer from the body and increase the area of pressure exerted on the obstructing element itself, favoring and magnifying its oscillation. Therefore, in the present invention, an element responsible for increasing the drag coefficient of the obstructing body (2) is included. This element, of variable geometry, can be placed upstream of the obstructing body (2), or downstream of it, separated from it, or attached to it, always with the intention of favoring and increasing the vortex street effect of von Karman The non-aerodynamic configurations, with respect to the aerodynamic ones, open the wake when a fluid passes through them producing the transformation of the laminar flow
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    Turbulent, which is what is sought in this case. The element (3), which favors the formation of von Karman's vortex street, will be referred to as the von Karman vortex street from now on. The height of this element is determined by the parameter t where t can vary from 0 (not including 0) to twice the value of (hqp) + H, which refers to the height of the vortex generator, formed by the body obstructor (2) and by the flexible element (1) where:
    h: refers to the length of the element (1).
    q: refers to the length of the element (1) that is fixed at one of its ends.
    p: refers to the length that the element (1) that is inside the obstructing element
    H: refers to the length of the obstructing element
    When von Karman's vortex-favoring element (3) is attached to the obstructing body (2), (3) experiences the same movement as him (2). When the vortex flapper (3) is not attached to the vortex generator (2), it remains still, it does not oscillate. In both cases the flattering element (3) could be made of a rigid, light or heavy material, depending on the dimensions and the installation area. In turn, the surface of this element could be rough or smooth. The shape of this element (3) includes cylindrical and conical geometries, and prisms of square, rectangular, triangular, trapezoidal, and polygonal bases (of n sides), truncated cones, prisms with geometric bases of n axes of symmetry, as per Example 5-pointed stars and prisms with elliptical bases where the relationship between the major axis and the minor axis is different from 1. The element (3), presenting any of the described geometries, can be solid or hollow.
    When the vortex street flapper (3) is located upstream of the vortex generator, composed of (1) and (2), it meets a number of characteristics. If the obstructing body (2) and the vortex street flapper (3) are observed from the position in which the first object that is appreciated is the vortex street flapper (3), and therefore behind the vortex generator, the obstructing body (2) has to exceed the dimensions of the vortex street flatter (3). This means that the obstructing body (2) must be seen behind the vortex street flapper (3). On the other hand, if it is observed from the opposite position (downstream) in which the first object that is seen is the vortex generator (1) + (2), and therefore behind it is the flattering of the street of vortices (3), the flattering (3) will not be observed since it will have been hidden by the obstructing body (2).
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    of the device, not only to maintain the efficiency of the electric generation, due to the oscillation of the vortex generator, but also to block the oscillation in extreme wind conditions. In the latter case the value of p would be equal to H.
    The total height taken by the vortex generator is the result of the sum of (hqp) + H, where the result can vary from 0.01 meters to 100 meters or more, and where the ratio (hpq) / H can vary from H = p until p = 0. Another technical aspect to consider is that when the shape of the obstructing body (2) is a truncated cone, the ratio of upper (a) and smaller (b) (a / b) radii is always greater than 1.
    The cantilever lever (1) that composes the vortex generator can be made of materials characterized by high mechanical resistance to breakage and low Young's modulus, such as carbon fiber. In turn, the surface of this element could be rough or smooth. The shape of this element (1) includes cylindrical and conical geometries, and prisms of square, rectangular, triangular, trapezoidal, and polygonal bases (of n sides), truncated cones, prisms with geometric bases of n axes of symmetry, as per example 5-pointed stars and prisms with elliptical bases where the relationship between the major axis and the minor axis is different from 1. The element (1), presenting any of the described geometries, can be solid or hollow.
    As for the obstructing body (2) it can be made of rigid or flexible material. It has a hollow central axis that crosses it along its total height H and contains part of the element (1). On the other hand, the total weight of the element (2) must allow the elastic recovery of the element (1). That is, in windy conditions the element (1) must be able to recover its initial position (not deformed) after having suffered a deformation.
    The inventors have considered the orientation ability of the device with the direction of fluid flow. Therefore, a device that rotates the necessary elements with the direction of the fluid flow has been implemented to ensure that the oscillation of the vortex generator (from which the electrical energy is obtained) always occurs. The device has a weather vane (4) placed in the highest part of the element (3), for example. This vane informs a control device (9), which is located at the base, of the direction that the assembly must take. The rotation of the elements can be carried out by means of a gear (6) driven by a motor (24) with a gearbox coupled (23) with the function of reducing the number of motor revolutions (24). The control device (9), with the information received from the wind vane (4), indicates to the engine the number of
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    second gear (16). This gear (16) is located in the base (5), and moves the rotor of a generator (18) that has a gearbox (17). This Figure also shows the system to recover the generated energy (19) and the protection system (13).
    Figure 2 shows the vortex generator (2) and the vortex street flapper (3), located upstream of the generator (2), and forming an angle of 90⁰ with the vortex generator and the absorption system . The absorption system consists of a connecting rod (12) -crank (11), timing belt (15), and gears (14) and (16). It is also observed the connection of the generator (18) with the energy storage system (19), by means of cables (10), and finally, the mechanism to orient all the elements comprising the gear (5), the gear (6) , and the weather vane (4).
    In Figures 3, 4 and 5 different views of the device are shown in which the mechanism of transformation of the oscillatory mechanical energy into rotational is shown more clearly to activate a generator and finally produce electrical energy. It shows the gear (5) that rotates depending on the wind direction orienting the system. In the image, the elements that are on the gear (5) and that therefore rotate, are the favoring of the vortex street (3), upstream of the vortex generator (1) and (2), and all transmission and conversion elements of the oscillatory movement as well as the generator and energy storage systems (10, 11, 12, 14, 15, 16, 17, 18 and 19) and the system cover (13).
    Figure 6 shows one of the embodiments of the invention that includes the protection systems to ensure their durability. The elements on the gear (5) are protected with the cover (13), which includes a groove that allows the vortex generator to oscillate. This cover is on the gear (5), so it also rotates to reorient itself with the direction of the wind. The cover (13A) protects the teeth of the gear (5), and the cover (13B) provides protection to the gear (6) that is fixed to the element (8).
    Figure 7 shows the oscillatory movement that occurs in the vortex generator in one of the preferred forms of the embodiment. The drag pressure caused by the detachment of vortices downstream from the obstructing body (2), provides an oscillation in said obstructing body (2), represented as a truncated cone. This oscillation deforms the element (1) that acts as a cantilever lever at its end
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    权利要求:
    Claims (1)
    [1]
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    ES2578428B1|2017-05-04|
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    引用文献:
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    JP2006226221A|2005-02-18|2006-08-31|Univ Nagoya|Power generating device|
    US20080048455A1|2006-08-25|2008-02-28|Matthew Eli Carney|Energy capture in flowing fluids|
    FR2922607A1|2007-10-22|2009-04-24|Thierry Vardon|Electricity generator i.e. static wind power generator, for e.g. power supply of boat, has piezoelectric elements transforming vibration and micromovement into electric discharges reusable in electrical circuit forming static wind generator|
    WO2012066550A1|2010-11-16|2012-05-24|Technion Research And Development Foundation Ltd.|Energy conversion from fluid flow|
    JP2012143109A|2011-01-05|2012-07-26|Nippon Telegr & Teleph Corp <Ntt>|Fluid vibration power generation apparatus|
    US20090114001A1|2007-05-25|2009-05-07|Bernitsas Michael M|Enhancement of vortex induced forces and motion through surface roughness control|
    US9109573B2|2012-02-03|2015-08-18|Incurrent Turbines Ltd.|Bluff body turbine and method|EP3707374A1|2017-11-07|2020-09-16|Graf S.p.A.|Resonance wind turbine|
    CN109798229B|2019-01-22|2020-06-12|上海交通大学|Galloping power generation device|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201530090A|ES2578428B1|2015-01-23|2015-01-23|System and method to obtain energy from a fluid|ES201530090A| ES2578428B1|2015-01-23|2015-01-23|System and method to obtain energy from a fluid|
    PCT/ES2016/070037| WO2016116657A1|2015-01-23|2016-01-25|System to obtain energy from a fluid|
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