EP2420441A2 - Agencement en mer et procédé d'installation d'un agencement en mer - Google Patents

Agencement en mer et procédé d'installation d'un agencement en mer Download PDF

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Publication number
EP2420441A2
EP2420441A2 EP11178154A EP11178154A EP2420441A2 EP 2420441 A2 EP2420441 A2 EP 2420441A2 EP 11178154 A EP11178154 A EP 11178154A EP 11178154 A EP11178154 A EP 11178154A EP 2420441 A2 EP2420441 A2 EP 2420441A2
Authority
EP
European Patent Office
Prior art keywords
offshore
ballast
water
tower section
fuselage body
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.)
Withdrawn
Application number
EP11178154A
Other languages
German (de)
English (en)
Other versions
EP2420441A3 (fr
Inventor
Jürgen Issleib
Hartmut Koch
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.)
IMPaC Offshore Engineering GmbH
Original Assignee
IMPaC Offshore Engineering GmbH
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 IMPaC Offshore Engineering GmbH filed Critical IMPaC Offshore Engineering GmbH
Publication of EP2420441A2 publication Critical patent/EP2420441A2/fr
Publication of EP2420441A3 publication Critical patent/EP2420441A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/027—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto steel structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/025—Reinforced concrete structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0065—Monopile structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0069—Gravity structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0091—Offshore structures for wind turbines

Definitions

  • the present invention relates to an offshore arrangement for receiving a transformer station for an offshore wind turbine and to a method for installing such an offshore arrangement.
  • wind turbines are commonly referred to as offshore wind turbines.
  • not only wind turbines are meant, for example, have been built outside the twelve miles zone, but all wind turbines, which are located on the open sea.
  • offshore wind turbines In addition to wind turbines, offshore wind turbines must have one or more transformer stations. These substations, of which one for several or all Wind turbines of an offshore wind turbine can be provided together are required to convert the electrical energy generated in a suitable form to allow the most efficient and low-loss transport over the often considerable distances via a submarine cable to the coast, where the energy then in the general power grid is fed.
  • Each transformer station is usually designed as a separate unit with respect to the wind turbines, ie as a separate transformer station, which must be provided in addition to the actual wind power facilities in the form of their own offshore structure or arranged in a separate offshore structure or supported by such.
  • the transformer stations were arranged on the model of oil platforms on or in platforms, which were supported above the water surface of a so-called.
  • Jacket ie a framework, or other support or support structure.
  • These support structures for example, had three or four support legs running from the water surface towards the seabed, which were anchored in the seabed in a suitable manner for safe foundation of
  • jacket foundations are typically accomplished by first installing the jacket preassembled on land and transported to the site of construction and setting it up on the seabed and then the platform is attached to the transhipment facility either by means of cranes or by means of a so-called float-over maneuver on the protruding from the water upper end of the jacket. In a float-over maneuver, the platform rests for transport on a catamaran-type transport vehicle, which can be lowered or raised by targeted ballasting and deburring in the water.
  • Such jacket foundations are complex and expensive to carry out due to the number of separately transported components and work tools (transport vehicles, cranes, etc.) and the nature of the work to be carried out on site and associated with high time and manpower.
  • MOAB Mobile Offshore Application Barge
  • MOABs which in the case of oil and gas platforms, for example, in the EP 2 204 497 A1
  • an entire, usually jacket-like, support structure or only the legs of the support structure are provided, wherein the platform sheath is arranged along the support structure between a first position in which it is arranged in the vicinity of the lower end of the support structure or the legs. and a second position, in which it is arranged near the upper end of the support structure or the legs.
  • the support structure or the legs can be raised during the transport of the total buoyant arrangement substantially from the water and lowered only at the installation site on the seabed.
  • the legs of the later support structure are provided on the MOAB, they can thereby be connected to a further, based on the seabed support structure part.
  • the platform shell is located generally in such an intermediate position between the described first and second position, that it floats in the waterline. Then it is - for example, with the help of temporarily installed strand jacks - raised on the support structure further upwards over the water surface in its final position.
  • Typical water depths for this type of offshore structure are in the range of 20 to 70 m, and thus lower than water depths that can be achieved with the help of the classic jacket foundations described above.
  • MOABs are complex due to the additional required mechanics and prone to errors, so that this approach is associated with high costs.
  • an offshore arrangement for receiving a wind-up system of an offshore wind turbine has a body with an outer shell and an interior defined by the outer shell.
  • the outer shell is designed to be closed in such a way that the body of the trunk as a whole in the manner of a ship swim and - as will be explained later - can be completely submerged underwater.
  • the interior is provided and adapted for the reception and installation of the trans-shipment system.
  • an elongate, tubular and preferably straight tower section which is open at both its ends and whose two ends are interconnected by the interior of the tubular section. It extends from the fuselage body and is attached with one of its two ends to the trunk body or connected to the fuselage body such that the interior of the tower section communicates with the interior of the fuselage body.
  • the tower section provides an access shaft extending along its length, at the opposite end of the fuselage body there is an access opening via which the access shaft and the interior of the fuselage body can be connected to the environment or permanently connected.
  • the offshore assembly further comprises two ballast devices on or in the body of the hull, which are arranged and adapted so that the arrangement can be held in a predetermined float state and lowered to the seabed.
  • the first ballast device is arranged in the manner and filled with a ballast material or more ballast materials that the offshore arrangement can float in the water without stable ballast material in the second ballast device in water, the tower section from the top of the trunk body transversely and preferably vertically or in the Extends substantially perpendicular to the water surface.
  • the floating offshore arrangement may float with the body of the body in the waterline while the tower portion extends upwardly away from the water surface.
  • fuselage body including the ballast facilities
  • tower section must be chosen so that the risk of tilting the offshore arrangement in the floating state is reduced as much as possible and preferably excluded.
  • solid materials such as sand, which are preferably permanently in the first ballast device are suitable as ballast material for arrangement in the first ballast device.
  • the second ballast device is designed so that targeted and optionally water can be introduced as a ballast material in it or discharged from it to realize as desired a ballast or Deballast réelle.
  • the second ballast device may comprise suitable valves and pumps in a manner known per se.
  • the second ballast device is arranged and configured in such a way that the offshore arrangement can be lowered by introducing water ballast into the second ballast device from the floating state in the water to the seabed. This means, on the one hand, that the ballast in the first ballast device, i. e.g.
  • ballast is designed so that the offshore arrangement with sufficient freeboard can get self-swimming with the help of its own drive or pulled by one or more ships to the destination, and on the other hand that by ballasting the second ballast means an increase in the total ballast can be achieved sufficient to lower the offshore arrangement.
  • each filling automatically causes a suitable distribution of the water ballast in the second ballast device or that the filling is possible in a corresponding manner with the aid of suitable control devices. In any case, can be dispensed with an external support during the sinking.
  • the dismantling is very easily possible by discharging water ballast from the second ballast device and deballastiert the offshore assembly in this way and is lifted from the seabed back into the floating state.
  • the dimensions of the offshore arrangement are chosen so that after the foundation at least the upper end of the tower section opposite the fuselage body projects out of the water with the access opening.
  • the offshore arrangement is suitably adapted to the depth of water at the place of use.
  • the offshore arrangement can be configured so that the fuselage body is completely submerged after foundation and only the tower portion preferably protrudes vertically or substantially perpendicularly out of the water. Since the tower section has a much smaller diameter than the fuselage body and can be chosen as small as possible in its dimensions substantially without regard to the concrete Umongsstrom, it is possible in an advantageous manner, acting on the offshore environment environmental forces, such as waves and currents to keep small.
  • the maximum diameter of the tower section is smaller and preferably much smaller than the maximum diameter of the fuselage body.
  • the trunk body may have a height of 12 meters or more in the direction of extension of the tower section and dimensions of 30 meters by 30 meters or more in a plane perpendicular to the spanwise direction, while the diameter of the tower may be 15 meters or less and Example may be 11 meters.
  • the lower limit for the dimensions of the fuselage body is determined by the size of the installation or installations to be installed and the size of an optionally desired residential area, while the diameter of the tower section is limited downwards by the maximum size of individual components, which ensures interchangeability through the tower section have to be.
  • the majority of the offshore arrangement may be located below the relevant environmental loads.
  • the underwater station thus formed, in particular the trunk body can advantageously be kept at atmospheric pressure, and constant access is ensured.
  • the offshore arrangement is particularly advantageous to use in water depths of about 20 to 40 meters, that is, in a range of water depths that is currently of interest in the North Sea.
  • the outer shell is wholly or partially double-walled
  • the second ballast means comprises at least a portion of the cavity between the outer and inner walls of the double-walled shell as a receiving space for water ballast.
  • one or more separate or interconnected water tanks are formed in the double-walled outer shell.
  • the first ballast device on one or more containers or receiving devices, which are arranged on the outside of the trunk body. It is particularly preferred if the first ballast device is arranged annularly circumferentially on the outside of the fuselage body. In this way, it is particularly easy to contribute to the stabilization of the floating offshore arrangement.
  • the first ballast device for example, annular in a plane perpendicular or substantially perpendicular to the extension direction be arranged of the tower section.
  • the first ballast means may comprise an annular receptacle or receptacles or a plurality of receptacles or receptacles uniformly or unevenly spaced around the trunk body.
  • the first ballast device has an annularly circumferential on the outside of the trunk body groove, which is formed by a protruding from the outer shell apron-like projection and whose open side is aligned in the direction of the side of the trunk body of which extends the tower section. It is possible that the channel is divided by intermediate walls into individual receptacles. Alternatively, a plurality of annular segment-shaped channel segments may be provided, which are arranged around the trunk body. Such a construction is easy to realize with e.g. To fill and wait for ballast.
  • a closure device is provided on the tower section with which the access opening of the tower section can optionally be opened and sealed in a watertight manner.
  • a closure device through which a water inlet, e.g. is prevented by troubled sea or rain, for example, may have one or more doors, flaps or hatches.
  • a number of piles can be arranged at a side opposite the tower section of the fuselage body, with which the offshore arrangement can be anchored and retained in the seabed after lowering the fuselage body in this.
  • the tower section opposite side of the fuselage body level is trained.
  • the trunk body is preferably buried at least partially in the seabed at the foundation.
  • the interior is subdivided into a plurality of regions separated by walls, of which at least one may be provided for receiving the or a trans-shipment system and at least one other may be formed as a living space.
  • the offshore arrangement can be used simultaneously as a crew's quarters, which extends their function.
  • the offshore arrangement is produced or mounted in such a way that in the interior of the fuselage body a Umthesesstrom or more Umthesesanlagen for an offshore wind turbine is or are arranged. It can be provided that one or more Umthesesanlagen are completely arranged in the interior. However, it is also possible that only parts of one or more substations are located in the interior, while the remaining parts of the Umthesesstrom or Umongsanlagen outside the interior are arranged in the second ballast device.
  • components of a recirculation system can be arranged in a water ballast receiving space of the second ballast device, ie, for example, in a corresponding water tank, and accordingly are completely or partially in water after the water is admitted into the second water ballast device.
  • Suitable components for arrangement in the second ballast device are, for example, transformers.
  • transformers To protect the components, it may be particularly advantageous to choose the already mentioned embodiment of the second ballast device, in which the ballast is done with fresh water.
  • the arrangement of parts of a transformer plant in the second ballast device has the advantage that space is used twice and therefore the dimensions of the trunk body and its interior can be reduced.
  • one or more closable by a Luk openings in the outer shell of the fuselage body or in the outer wall component of a double-walled outer shell are formed.
  • a platform is attached, which can be used as a landing pad for a helicopter.
  • such an offshore arrangement may be installed by a method of floating the land-prefabricated offshore assembly floating to its place of use, the second ballast not containing water or just enough water to float is possible, the second ballast device is filled with water after reaching the place of use so that the offshore arrangement decreases, and the fuselage body is founded on the seabed. Further details of the method have already been given in the context of the above explanations.
  • FIG. 1 shown in a perspective view offshore arrangement 1 has a trunk body 2 and an elongated, straight tower section 3, which extends perpendicularly from the upper side 4 of the trunk body 2.
  • the tower section 3 has a circular cross section and is - like FIG. 2 can be seen - designed as a hollow cylinder. But it is also possible to provide other cross-sectional shapes, such as an oval, square or rectangular cross section or a cross section in the form of a regular polygon. In the illustrated embodiment, the tower section 3 further has a uniform cross section along its length.
  • the hull body 2 has in the illustrated embodiment substantially the shape of a cuboid whose upper peripheral edge is chamfered. Also for the hull body 2, other shapes and configurations are possible, such as generally the shape of a straight prism or a circular cylinder portion.
  • a channel-shaped receiving device 6 is arranged by an open to the top 4 of the fuselage body 2, apron-like configured and circulating from the lower Edge of the fuselage body 2 outgoing wall component 7 is formed and divided by a plurality of partitions 8 into a plurality of receptacles 9.
  • the receiving device 6 may comprise a closure device with which the receptacle 9 can be closed.
  • each receptacle 9 may have a flap or lid, or a plurality of receptacles 9 may be a flap or lid share.
  • the receiving device 6 is a first ballasting device, which is provided for receiving a preferred solid ballast material.
  • a working crane 11 is arranged next to a closable access device 10 to the interior of the tower section 3 and a platform 13 on a post 12, on which a helicopter can land.
  • the fuselage body 2 defines an interior space 15, which is arranged in an outer shell 25 and is divided by walls 16 (this term is also intended to include floors in this context) into different subsections or spaces and floors.
  • an arranged in extension of the tower section 3 large and hall-like portion 17 of the interior 15 is configured together with other spaces 18 in the two lower floors as a plant and work area in which a Umwoodsstrom (not shown) for an offshore wind turbine or parts of a such transformer plant is installed or can or can be installed or can.
  • a Umongsstrom (not shown) for an offshore wind turbine or parts of a such transformer plant is installed or can or can be installed or can.
  • the interior 15 is designed as a living area 19 for personnel.
  • the access device 10 at the upper end of the tower section 3 has on the one hand a door 23, through which one can get into the staircase 22, and on the other hand, a hatch 24, which is arranged at the upper end of the hatch shaft 21.
  • the hatch shaft 21 extends from the hatch 24 at the upper end of the tower section 3 straight down over the entire length of the tower section 3 down to the interior 15, the hatch shaft 21 ends in the plant and work area 17. In this way, it is possible, for example with the help of the crane 11 system components in the plant and work area 17, 18 let down or raise from this.
  • the access device 10 is constructed so that the hatch 24 and the device with the door 23 are arranged together on a larger hatch 35, which closes a larger access opening at the upper end of the tower section 3. If larger components are to be replaced that do not fit through the hatch 24, the entire access device 10 with the larger hatch 35 can be removed to provide a larger access opening.
  • the staircase 22 can be lifted out of the access shaft 20 in order to allow free access to the area 17.
  • FIG. 2 shows the offshore arrangement 1 in the established state, in which the fuselage body 2 is anchored to the seabed 30.
  • the fuselage body 3 has been partially buried with the surrounding first ballast means 6 for this purpose in the seabed 30.
  • the offshore arrangement 1 has a separate second ballast device 32, which is designed to receive water as ballast.
  • the outer shell 25 of the fuselage body 2 is double-walled.
  • the intermediate space is divided into a plurality of possibly spaced apart water tanks.
  • the water tank (s) 32 may be filled by suitable means (not shown), such as valves and pumps, optionally with seawater or fresh water from a separate supply vessel, or the water may be removed from the water tank (s) 32.
  • suitable means not shown
  • the total ballast of the offshore arrangement 1 can be selectively increased and decreased in a certain area.
  • the transhipment system in the plant and work area 17, 18 is housed and that some components of the transhipment system, such as Example transformers in which or the water tank 32 are housed.
  • fixed ballast 33 is arranged in a predetermined amount, for example in the form of sand in the illustrated embodiment.
  • This predetermined amount and the distribution of the solid ballast 33 in the first ballast device are chosen so that the entire offshore arrangement 1 in the in the FIGS. 1 and 2 shown in the waterline 34 floats stable when no water in the Wasserballast Nur 32 is arranged. In this floating state, the offshore arrangement can be freeboard through its own propulsion facilities or pulled by ships as a fully assembled unit to be moved to the job site.
  • the Wasserballast acquired 32 is chosen in their dimensions and in their arrangement so that by filling with water ballast of the total ballast can be increased so that the offshore arrangement 1 leaves the floating state and sinks in the water until the fuselage body 2 rests on the seabed 30 ie until the in FIG. 2 shown state is reached.
  • the foundation is thus possible in a simple manner by only water ballast is introduced into the water ballast device 32.
  • the offshore assembly 1 can be easily removed from the job site by removing the water ballast from the water ballasting device 32, causing the offshore assembly 1 to rise and return to the floating state.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wind Motors (AREA)
EP11178154A 2010-08-20 2011-08-19 Agencement en mer et procédé d'installation d'un agencement en mer Withdrawn EP2420441A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010035024 DE102010035024A1 (de) 2010-08-20 2010-08-20 Offshore-Anordnung und Verfahren zur Installation einer Offshore-Anordnung

Publications (2)

Publication Number Publication Date
EP2420441A2 true EP2420441A2 (fr) 2012-02-22
EP2420441A3 EP2420441A3 (fr) 2012-08-15

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EP11178154A Withdrawn EP2420441A3 (fr) 2010-08-20 2011-08-19 Agencement en mer et procédé d'installation d'un agencement en mer

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EP (1) EP2420441A3 (fr)
DE (1) DE102010035024A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2593263A1 (es) * 2015-06-05 2016-12-07 Iberdrola Renovables Energía, S.A. Sistema de cimentación por gravedad para la instalación de aerogeneradores o instalaciones offshore y procedimiento para la instalación de un sistema de cimentación de aerogeneradores o instalaciones offshore

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011013853A1 (de) 2011-03-14 2012-09-20 Impac Offshore Engineering Gmbh Selbsterrichtende Offshore-Anordnung
DE102012209700A1 (de) * 2012-06-11 2013-12-12 Siemens Aktiengesellschaft Offshore-Installation für Windparks
DE102018210623A1 (de) * 2018-06-28 2020-01-02 Siemens Aktiengesellschaft Schwimmkörper, Windkraftanlage und Hochseewindpark
DE102019122110A1 (de) * 2019-08-16 2021-02-18 EnBW Energie Baden-Württemberg AG Schwimmende Windenergieanlage mit integriertem Umspannwerk

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Publication number Priority date Publication date Assignee Title
EP2204497A1 (fr) 2008-12-03 2010-07-07 Overdick GmbH & co. KG Procédé destiné à l'installation d'un agencement offshore flottant et agencement offshore flottant

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DE2733240A1 (de) * 1977-07-22 1979-02-01 Linde Ag Schwimmende speicheranlage fuer fluessigkeiten
DE10013442C1 (de) * 2000-03-17 2001-10-31 Tacke Windenergie Gmbh Windkraftanlage
ITTO20070666A1 (it) * 2007-09-24 2009-03-25 Blue H Intellectual Properties Sistema di conversione di energia eolica offshore per acque profonde
DE102008041849A1 (de) * 2008-09-05 2010-03-25 Max Bögl Bauunternehmung GmbH & Co. KG Off-Shore-Anlage, Fundament einer Off-Shore-Anlage und Verfahren zum Errichten einer Off-Shore-Anlage

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Publication number Priority date Publication date Assignee Title
EP2204497A1 (fr) 2008-12-03 2010-07-07 Overdick GmbH & co. KG Procédé destiné à l'installation d'un agencement offshore flottant et agencement offshore flottant

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2593263A1 (es) * 2015-06-05 2016-12-07 Iberdrola Renovables Energía, S.A. Sistema de cimentación por gravedad para la instalación de aerogeneradores o instalaciones offshore y procedimiento para la instalación de un sistema de cimentación de aerogeneradores o instalaciones offshore

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DE102010035024A1 (de) 2012-02-23
EP2420441A3 (fr) 2012-08-15

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