EP4051854A1 - Tour à ossature en bois destinée aux éoliennes - Google Patents

Tour à ossature en bois destinée aux éoliennes

Info

Publication number
EP4051854A1
EP4051854A1 EP20800822.7A EP20800822A EP4051854A1 EP 4051854 A1 EP4051854 A1 EP 4051854A1 EP 20800822 A EP20800822 A EP 20800822A EP 4051854 A1 EP4051854 A1 EP 4051854A1
Authority
EP
European Patent Office
Prior art keywords
tower
carrier
carriers
section
nodes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20800822.7A
Other languages
German (de)
English (en)
Inventor
Carlo FROH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP4051854A1 publication Critical patent/EP4051854A1/fr
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/04—Structures made of specified materials of wood
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/04—Structures made of specified materials of wood
    • E04H12/06—Truss-like structures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a timber lattice tower on which a machine nacelle and a rotor of a wind power plant (WEA) or wind power plant (WKA) can be installed.
  • WEA wind power plant
  • WKA wind power plant
  • the tower of a wind turbine is exposed to high loads at times, which it must withstand safely under all operating conditions. On the one hand, it has to bear the weight of the rotor and the machine nacelle, which together can weigh up to several hundred tons and which can be set in vibration. On the other hand, and of a similar magnitude, it has to withstand the wall load, especially in gusts, which occur as a predominantly horizontal load and, in particular, have high bending moments at the base of the tower.
  • the tower construction should also take into account its transport to the construction site, its erection and, if possible, its dismantling.
  • the towers are designed for the intended service life of the entire wind power plant.
  • Conventional wind power systems regularly include reinforced concrete, steel or hybrid towers, and occasionally also steel lattice towers.
  • the construction of wooden towers is relatively new.
  • a wooden tower is a tower-shaped structure whose load-bearing structure or the main building material is made of wood. It is usually built in a manner similar to a steel lattice tower with a square floor plan and an open half-timbered construction.
  • the advantages of wooden towers are the nature-friendly processing of a renewable raw material and the neutrality of wood with regard to electromagnetic waves (cf. WIKIPEDIA ® , keyword “wooden tower”, accessed on October 21, 2020).
  • a first prototype was erected in October 2012 with a wind power plant in Hanover-Marienwerder.
  • the wind turbine includes a 100 meter high wooden tower. It consists of 28 floors and has a stable octagonal outer wall of approx. 30 cm wall thickness made of plywood. Around 1000 trees were felled to produce this tower (around 400 m 3 of wood, equivalent to around 200 t). Machine nacelle and rotor of the wind turbine load on the tower with a weight of approx. 100 t.
  • a UV-stable PVC film forms the protective outer skin of the tower (cf. WIKIPEDIA ® , keyword “wind power plant”, accessed on October 21, 2020).
  • the object of the invention is therefore to provide a construction for wooden towers for wind energy systems that allow economical production despite great construction heights.
  • the rotationally symmetrical timber lattice tower for wind turbines. It comprises a foot section of circular cross-section, a head section of the same type and supports made of glued wood trusses, which extend continuously from the foot section to the head section.
  • the girders run in pairs in opposite directions and in a helical or spiral shape, intersect several times at nodes and are wound around a geometric axis of rotation or vertical axis of the tower.
  • the foot section of the timber lattice tower rests on a conventional foundation. Ring foundations make economic sense.
  • the head section creates the transition from the timber frame tower to the machine nacelle.
  • the beams made of glued wood trusses run in between.
  • Glued timber, glued laminated timber (glulam or glulam for short) or glued beams are understood to mean at least three board layers and at least wood glued in layers in the same grain direction. They are mainly used in timber engineering, i.e. for static loads.
  • Glued laminated timber girders are known as glued laminated girders (cf. WIKIPEDIA ® , keyword “glued laminated timber”, accessed on October 21, 2020).
  • the supports run helically or spirally, in pairs in opposite directions.
  • the respective course of a carrier thus describes a helical helix or turn around a vertical axis of rotation of the rotationally symmetrical tower.
  • the pair of carriers running in opposite directions leads to at least one pair of carriers, one of which is a right-turning carrier and the other is a left-turning carrier.
  • a clockwise and a counterclockwise carrier thus cross each other several times in the course of their spiral-shaped counter-course. At the intersections of the girders there are nodes at which the girders are mechanically connected.
  • each inventive pair of curved or twisted beams is connected several times in its course, not in one and the same plane, but in different tangential planes of the mantle of the tower, which is round in cross section.
  • Each pair of girders in itself therefore already forms a stable space framework.
  • each pair of carriers is connected several times to further pairs of carriers, which in turn are connected to one another several times.
  • the multiple connection of each pair of girders and the multiple connection of several pairs of girders with one another already lead to a high level of rigidity.
  • the girders wind around an axis of rotation so that the space framework takes on a quasi-tubular shape.
  • the invention is initially based on a cylindrical tower, the jacket of which is composed of he lix-shaped wound supports.
  • a helix or a screw, a screw line, a cylindrical spiral or a helix is, in a strictly mathematical sense, a curve that moves winds around the jacket of a cylinder with a constant slope, constant curvature and a constant distance from the axis of rotation.
  • Other rotationally symmetrical shapes with a circular outline, which the tower can assume, can in principle also be a cone or a truncated cone.
  • the tower can have a cross section that tapers towards the head section. The taper can run linearly ver, so that a conical or slender frustoconical shell of the tower results.
  • the tapering can follow other mathematical laws, so that a surface line of the tower, for example, corresponds in a mathematical sense to a decreasing exponential function, the tapering in any case offers a wide base section, the diameter of which decreases rapidly at first, later slowly becoming a slender head section.
  • the tapering of the tower cross-section serves the stability of the tower, especially since this results in smaller attack surfaces for wind and thus lower wind loads on the head section.
  • the carrier forming the jacket of such a tower then run in the form of a spatial, in particular conical spiral, namely with a decreasing distance from the axis of rotation to the head section and with increasing curvature.
  • the right- and left-hand rotating beams themselves are not twisted, but are manufactured in the factory in the required spiral shape to measure and fit.
  • the individual lamellas of the glued wood trusses are twisted during production and glued together in their twisted form.
  • carriers can be produced that are continuously wound from the foot section to the head section.
  • the girders can be interrupted in their course insofar as two girder sections or segments lying one behind the other in the direction of the girders are mechanically coupled at some or all of the nodes.
  • the carrier segments can be dealt, dovetailed, tapped or otherwise carpentry-wise at their joints.
  • the segments can be fastened to one another with parallel perforated steel plates or sheets and steel bolts running transversely thereto in the transversely pierced segment ends.
  • This allows shorter sections of the carrier to be created, which simplifies their manufacture and transport. Nevertheless, the carriers run continuously, at least structurally, from the foot section to the head section.
  • the fastening of the carrier segments to one another can in principle take place at any point along the length of the carrier.
  • the support segments can be fastened to one another at the nodes.
  • any cross-sections of the carrier can be produced from glued wood, for example round, oval, diamond-shaped or rectangular cross-sections.
  • the supports of the tower can have square cross-sections. The lamellas required for this can then have largely the same rectangular cross-section, which does not unnecessarily complicate the manufacture of the carrier and its coupling with other carriers.
  • other cross-sections can be created with little additional effort, for example those with an upper side inclination of the carrier towards a future outside of the tower or with an outside rounding in order to promote the runoff of rainwater on the tower.
  • the carriers can have a constant cross-section in the direction of extension.
  • the carriers can taper in their course from the foot section to the head section.
  • the tapering can again and in a simple case run linearly, but can also take place non-linearly.
  • the tapering of the girders can also lead to a material reduction in line with the decreasing loads on the tower. In any case, it reduces the dead weight load and contributes to the economical use of materials.
  • the girders crossing at an acute angle are mechanically connected at the nodes.
  • two girders can contact one another at the nodes in that the outer side of the one girder facing away from the vertical axis of the tower rests against the inner side of the other girder. In this way, beams can be connected that pass through the node.
  • the intersecting carriers can have a comb at the node.
  • a combing or comb connection results from a recess in the carrier starting from the contact surfaces of the carrier and corresponding in shape to one another, so that the carriers can dip into the respective other carrier in sections during their assembly. For example, if the recess takes up a quarter of the carrier thickness, the carriers dip into one another for a total of half the thickness of the carrier, but still lie in different planes.
  • the carriers at the node points can lie in the same plane.
  • they can penetrate each other, for example, with a comb or recesses that are cut halfway into the carrier.
  • the girders can be joined at the junction so that four girders meet there.
  • the arrangement of the girders at the nodes in the same plane results not only in a more compact shell of the tower, but also in an offset-free power transmission between the intersecting girders.
  • the tower can have horizontally ver running and coupled to the carriers rings.
  • the rings can be attached on the outside or preferably on the inside of the girders in order to form a stiffening plane orthogonal to the vertical axis of the tower. They reduce the bending stress on the girders by absorbing forces acting radially on the tower and transferring and distributing them as compressive forces.
  • torsional moments emanating from the machine nacelle can occur on the tower due to winds hitting the rotor from the side.
  • the task of the rings according to the invention is to distribute the torsional moments evenly over all carriers and rings.
  • the rings can basically be made of metal, which means that they can be made visually relatively inconspicuous. Preferably, however, they can also be made as a glue wood binder, especially since they mainly absorb compressive forces and make a more harmonious impression with the girders made of wood.
  • the coupling points of the rings on the carriers can largely be chosen as desired.
  • the rings can be coupled to them at the knot points of the carrier. This allows the number of nodes in the space framework to be reduced, which, in addition to optical advantages, also reduces the assembly of the tower and the effort involved in producing the nodes.
  • the nodes of the girders and the coupling of the rings there can basically be carried out according to the known rules of carpenter-like wood connections. Due to the high loads, perforated strips or perforated steel sheets and steel bolts orthogonally passed through them can also serve as connecting means.
  • the perforated steel sheets can each be attached on the outside or embedded in the carrier or surround them like a sleeve.
  • the tower can have a ladder with climbing protection, a stairway with handrail or fall protection, if necessary a car or elevator and / or devices for cable routing, especially for maintenance purposes. Rings on the inside are suitable for their assembly.
  • the tower can have an annular connection adapter surrounding the head-soaped ends of the carriers as an interface to the
  • connection adapter creates a high degree of rigidity at the head section and thus contributes significantly to the high overall rigidity of the tower. It can also be made from glued wood trusses. Because of the large number of highly stressed coupling points in a confined space, namely through the edging and connection of the girder ends and the coupling with the rotatable machine nacelle, it is advisable to design the connection adapter from metal.
  • FIG. 2 a three-dimensional view of a first embodiment of the tower according to the invention
  • FIG. 3 an interior view of the first embodiment
  • FIG. 4 a top view of the first embodiment
  • FIG. 5 a three-dimensional view of a second embodiment of the tower according to the invention
  • FIGS. 12 to 15 nodes of the second embodiment
  • FIG. 16 a perspective view of a first embodiment of a ring structure
  • FIG. 17 a top view of the ring structure according to FIG. 16,
  • FIG. 18 a bottom view of the ring structure according to FIG. 16,
  • FIG. 20 a top view of the ring structure according to FIG. 19,
  • FIG. 21 a bottom view of the ring structure according to FIG. 19,
  • FIG. 1 shows a three-dimensional view of a wind turbine 15 according to the invention comprises a timber lattice tower 1 which is circular in plan and which is rotationally symmetrical about an axis of rotation a, which rests on an annular foundation 14 and consists essentially of wound girders 2.
  • the girders 2 are made of glued laminated timber and spiral in pairs around a vertical axis of rotation of the rotationally symmetrical tower 1 from its foot section 19 to its head section 20.
  • Each girder 2 consists of girder sections or segments 4 which are connected to one another at nodes 21 via connecting elements 5.
  • rings 3 made of glued wood trusses are attached inside, which give the overall structure additional rigidity against shear and torsional loads.
  • the tower 1 carries a machine nacelle 11 on its head section 20, which is connected to the tower 1 via a ring-shaped connection adapter 12 and which comprises three rotor blades 13.
  • FIG. 2 and FIG. 5 offer three-dimensional views of a first and a second embodiment of the tower 1 according to the invention.
  • the girders 2 form a jacket structure of the tower 1 which tapers from the foot section 19 to the head section 20.
  • the outer surfaces or outer sides 18 of both embodiments of the tower 1 can be with a mathematical Describe the meaning of the envelope function of a damped oscillation.
  • the envelope corresponds to a decreasing exponential function when viewed from the base of the tower to the top of the tower.
  • the horizontally arranged and inside circumferential rings 3 run. Their diameters decrease with increasing height in the tower 1 and, as shown in FIGS. 3 and 6, dominate the interior views of both embodiments of the tower 1. They are therefore suitable for fastening a not illustrated, essentially vertically oriented infrastructure of the tower 1 such as ladders and stairs including fall protection, cars and elevators, cable routes and the like.
  • the first embodiment of FIG. 2 differs from the second embodiment according to FIG. 5 in the formation of the nodes 21:
  • the supports 2 “penetrate” one another at the nodes 21 of FIG. 2. They are therefore in the same plane at each node 21 and thus overall form a smooth-surface, albeit lattice-shaped, jacket or, in this respect, a “smooth” outside 18 of the first embodiment of the tower 1.
  • Each carrier 2 rises from a base point 22.
  • Each base point couples a clockwise carrier 23 and a counterclockwise carrier 24 and at the same time provides a coupling with the foundation 14.
  • the combination of functions from the coupling of the carrier 23, 24 on the one hand and the coupling to the foundation 14 on the other hand is used to facilitate assembly and a low material cost.
  • clockwise carriers 23 and counterclockwise carriers 24 wind up with a decreasing distance about the axis of rotation a to the head section 20. In their course they first cross with six other left or right-handed girders 24, 23 before the same girders 23, 24 from the base point 22 meet again at the seventh node 21, in the view of FIG. 2 on the back of the tower 1.
  • each erfindungsge Permitted right-hand carrier 23 of a pair of carriers in the present case receives three common coupling points with a counter-clockwise carrier 24, in the case under consideration, a point in the common base and two in common nodes 21.
  • Any other pair of carriers made up of a right-handed carrier 23 and a left-handed carrier 24 also has three common coupling points in the present case.
  • each pair of girders is coupled to girders 23, 24 of other girder pairs at 12 further nodes 21, 22, 25, with the base points 22 and the top points 25 counting as well.
  • FIGS. 8, 9 and 10, 11 illustrate two coupling possibilities of two carriers 23, 24 at a node 21:
  • the coupling according to FIGS. 8, 9 is based on two parallel side by side in the carrier 23, 24 perforated steel or web plates 7, to which the multiple pierced ends of two supports 23, 24 are fastened with a total of 32 steel bolts.
  • the steel bolts 8 of the two middle horizontal rows of bolts are longer, so that two segments of a ring 3 can be attached to the junction 21 with a perforated sheet steel.
  • This coupling variant leaves only a few steel elements visible on the outside.
  • the ends of the supports 23, 24 can be received in an X-shaped perforated steel sleeve 6 and fastened by transverse steel bolts 8.
  • a perforated steel sleeve 6 welded on the inside with a cross-section corresponding to that of the ring 3 takes on segments of the ring 3 on both sides, which are also fastened with steel bolts 8.
  • the ends of the supports 23, 24 and of the ring 3 at the nodes 21 are tapered by the material thickness of the connecting elements, namely the steel sleeves 6. This gives you a flush surface with the steel sleeves 6.
  • the inside view or bottom view of FIG. 3 shows that the carriers 23, 24 can be arranged in an odd number of seven pairs.
  • Each of the base points 22 as a support on the foundation side couples a right-hand carrier 23 and a left-hand carrier 24. To this end, it holds the carriers 23, 24 according to FIGS. 24, 25 (the latter as an exploded view) in a shared perforated steel sleeve 9 and secures it therein with steel bolts 8 across the steel sleeve 9 and the respective carrier 23, 24.
  • the steel sleeve 9, which opens upwards in a V-shape, is concreted in the ring foundation 14. Again, the ends of the carrier 23, 24 are tapered by the material thickness of the steel sleeve 9 in order to avoid horizon tal edges where waterlogging could collect.
  • the base point according to FIGS. 22, 23 shows fewer steel parts as connecting means.
  • FIG. 4 shows the supports 23, 24 which taper towards the head section 20 and which, in addition to its self-tapering shape, give the tower 1 a relative weight that decreases with height.
  • Each carrier 23, 24 therefore completes a 360 ° rotation between the foot section 19 and the head section 20 with 15 coupling points 21, 22, 25, three times with the respective opposite carrier 24, 23, namely at the foot point 22, on the half its course in a node 21 on the side of the tower 1 opposite the base 22 and finally in the head section 20 on the connection adapter 12.
  • connection adapter 12 shows the connection adapter 12 according to the invention as a transition between the tower 1, which is polygonal in horizontal cross-section, and the circular connection for the machine nacelle 11.
  • the adapter 12 is connected to the tower 1 via perforated steel sleeves 16 which are open at the bottom and which are drilled through be bolted to the head ends of the beams 23, 24.
  • FIG. 5 shows a three-dimensional view of a second embodiment of the tower 1 according to the invention.
  • the right-turning carriers 23 of FIG. 5 extend inwardly offset by their carrier thickness to the left-turning ones Carriers 24 around the axis of rotation a, so that two mutually parallel Trä gerhüllen result.
  • the top view of FIG. 7 essentially shows the outer one of the two carrier sleeves from the left-rotating carriers 24, under which the inner carrier sleeve from the carriers 23 is located.
  • junction points 21 of the second embodiment follows the principles of FIGS. 8 to 11 according to FIGS. 12, 13 and 14, 15 (the latter in each case as an exploded view). Due to the different support levels of the supports 23, 24 in the junction point 21, each support 23 has , 24 a separate perforated steel or web plate 8 according to FIGS. 12, 13. 20 longer steel dowels 8 fasten the supports 23, 24 to one another. The segments of the ring 3 are attached in the manner already described above.
  • Each support 23, 24 has its own steel sleeve 6.
  • the steel sleeves 6 of a node 21 are welded together and with a further steel sleeve 6 for the ring 3 provided.
  • the juxtaposed carrier casings of the carrier 23 on the one hand and the carrier 24 on the other hand also take into account the base points 22 according to FIGS.
  • Two pairs of perforated web plates 10, which are arranged parallel to one another and which are embedded in concrete in the ring foundation 14, are embedded in appropriately dimensioned incisions in each base section of the respective girders 23, 24 drilled through several times, and with ten steel dowels running through the web plates 10 and the girders 23, 24 8 attached.
  • perforated steel sleeves 9 arranged next to one another can each receive a carrier end of a carrier 23, 24 and fasten them therein with ten steel bolts 8 protruding transversely through both steel sleeves 9 and the respective carrier 23, 24.
  • the steel sleeves 9, which open obliquely upwards, are concreted in the ring foundation 14. Again, the ends of the supports 23, 24 are tapered by the material thickness of the steel sleeves 9 in order to avoid horizontal edges on which waterlogging could collect.
  • connection adapter 12 to a rotatable machine nacelle 11 clarify the Fig. 19 to 21. It has seven top plates 27 on which downwardly protruding and perforated steel sheets 17 are attached. A pair of supports 23, 24 each with steel bolts 8 are attached to them with transversely drilled head ends. The steel sheets 17 are attached to a ring structure 26, which represents a mechanical interface to the machine nacelle 11.
  • the carriers 23, 24 of the second embodiment which form different carrier sleeves, offer the same structural advantages as the first embodiment. Only the visual impression differs slightly because the second embodiment does not offer a “smooth” but a more clearly structured view that emphasizes the construction principle of the winding wooden truss of the tower according to the invention a little more. Since the above, detailed wooden lattice towers are from exemplary embodiments, they can be modified in the usual way by a person skilled in the art to a large extent without departing from the scope of the invention. In particular, the specific configurations of the coupling points can also take place in a form other than that described here, in particular if this is necessary for reasons of space or design. Furthermore, the use of the indefinite article “a” or “an” does not exclude the possibility that the relevant features can also be present more than once.
  • connection adapter 12 16 Steel sleeve on the connection adapter 12
  • connection adapter 12 28 steel bolts or holes on the connection adapter 12 a rotation axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne une tour à ossature en bois symétrique en rotation (1) destinée aux éoliennes. Ladite tour comprend une partie pied (19) et une partie tête (20), et également des supports (23, 24) se composant en des poutres de bois laminées, qui s'étendent en continu de la partie pied (19) à la partie tête (20) et, dans chaque cas, de façon hélicoïdale par paires dans des directions opposées, se croisant les uns sur les autres de multiples fois au niveau de nœuds (21), autour d'un axe de rotation (a) de la tour (1).
EP20800822.7A 2019-10-29 2020-10-28 Tour à ossature en bois destinée aux éoliennes Pending EP4051854A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA347/2019A AT523137A1 (de) 2019-10-29 2019-10-29 Holzturm für Windenergieanlagen
PCT/EP2020/080323 WO2021083976A1 (fr) 2019-10-29 2020-10-28 Tour à ossature en bois destinée aux éoliennes

Publications (1)

Publication Number Publication Date
EP4051854A1 true EP4051854A1 (fr) 2022-09-07

Family

ID=73059848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20800822.7A Pending EP4051854A1 (fr) 2019-10-29 2020-10-28 Tour à ossature en bois destinée aux éoliennes

Country Status (3)

Country Link
EP (1) EP4051854A1 (fr)
AT (1) AT523137A1 (fr)
WO (1) WO2021083976A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE16684E (en) * 1927-07-19 Metal pole
GB2339436B (en) * 1998-06-27 2002-07-10 Cowley Structural Timberwork L Tower structure
DE102007006652B4 (de) 2007-02-06 2014-03-06 Timbertower Gmbh Windkraftanlage
DE102010018412A1 (de) * 2009-04-19 2011-01-27 Timber Tower Gmbh Turm für eine Windkraftanlage
GB201107205D0 (en) * 2011-04-28 2011-06-15 Innoventum Ab A wind turbine tower made of wood and a method of erection thereof
AT515681B1 (de) * 2014-05-26 2015-11-15 Reinhard Ferner Seilunterstützungen für Seilschwebebahnen oder Schlepplifte
DE102014111958A1 (de) * 2014-08-21 2016-02-25 Lindner Ag Aus Holzstreben aufgebaute gewölbte Schalenkonstruktion

Also Published As

Publication number Publication date
AT523137A1 (de) 2021-05-15
WO2021083976A1 (fr) 2021-05-06

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