DK202000220A1 - An offshore jack-up installation and method - Google Patents
An offshore jack-up installation and method Download PDFInfo
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- DK202000220A1 DK202000220A1 DKPA202000220A DKPA202000220A DK202000220A1 DK 202000220 A1 DK202000220 A1 DK 202000220A1 DK PA202000220 A DKPA202000220 A DK PA202000220A DK PA202000220 A DKPA202000220 A DK PA202000220A DK 202000220 A1 DK202000220 A1 DK 202000220A1
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- 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
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- 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
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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- General Engineering & Computer Science (AREA)
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Abstract
An offshore jack-up installation comprises a hull and a plurality of moveable legs engageable with the seafloor, wherein the offshore installation is arranged to move the legs with respect to the hull to position the hull out of the water when the legs engage the seafloor. The offshore jack-up installation also comprises an exhaust processing module arranged to receive exhaust gas comprising carbon dioxide. The exhaust module is arranged to process carbon dioxide in the exhaust gas and to output processed carbon dioxide to at least one other offshore installation for storage in carbon dioxide storage pocket in the seabed.
Description
DK 2020 00220 A1 An offshore jack-up installation and method The present invention relates to an offshore jack-up installation and method. There is an increasing demand to reduce the dependency on carbon-based fuels to limit overall carbon dioxide emissions. Accordingly, many coastal areas have installed wind turbine generators as a source of renewable energy. One problem with wind turbine generators is that during intermittent above average windy conditions, the electricity generated may oversupply the local onshore energy demands and/or the transmission capacity of the electrical grid. For example this caused about 40% of Germany's total rated capacity of wind power to be wasted in 2018 due to grid constraints. In this way, the over generation of electricity can increase the frequency fluctuations in the onshore power distribution network and potentially destabilize the onshore power distribution network. One solution is to deliberately adjust the angle of the blades such that the wind turbine generators produce less power than would otherwise be the case if they were allowed to produce at their rated capacity. This is a problem because operational inefficiencies are deliberately introduced for the wind turbine generator which wastes energy.
One known solution for utilising the excess renewable energy generated under such excessive wind conditions for the production of hydrogen through electrolysis (also termed "green hydrogen”) is discussed in WO2019/210961. WO2019/210961 discloses installing a hydrogen production system locally at the base of each wind turbine generator. A problem with this arrangement is that retrofitting this solution individually to different types of wind turbine generators or to the large number of wind turbines within an offshore windfarm is costly and increases the complexity of maintenance of a wind farm. Furthermore by installing a hydrogen production system at each wind turbine generator increases the inefficiencies.
Examples of the present invention aim to address the aforementioned problems. In a first aspect of the invention, there is an offshore jack-up installation comprising: 1
DK 2020 00220 A1 a hull; a plurality of moveable legs engageable with the seafloor, wherein the offshore installation is arranged to move the legs with respect to the hull to position the hull out of the water when the legs engage the seafloor; a power distribution module connectable to at least one offshore renewable electricity generator; and a hydrogen generation module connected to the power distribution module. In the quest to convert excess wind energy power into various forms of energy storage, gaseous or liquid zero-carbon fuel solutions which may be utilized for transport over air, sea and land, hydrogen production has drawn much attention. Advantageously if the energy conversion process can take place offshore at or near to where the energy is produced, there is potential for significant reduction of the energy transmission losses otherwise associated with sending high voltage electrical power through subsea cables back to shore over very long distances.
Optionally, the at least one offshore renewable electricity generator is one or more of a wind turbine generator, a wave energy generator, current energy generator, catalytic generator and / or a solar cell.
Optionally, the power distribution module is connectable to a plurality of offshore wind turbine generators in a wind farm.
Optionally, the power distribution module is connectable to an onshore power distribution network.
Optionally, the hydrogen generation module is in fluid connection with an onshore gas pipeline.
Optionally, the hydrogen generation module is in fluid connection with a storage tank.
Optionally, the hydrogen generation module is configured to electrolyse water. Optionally, the offshore jack-up installation comprises a seawater treatment module arranged to generate fresh water for the hydrogen generation module.
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DK 2020 00220 A1 Optionally, the offshore jack-up installation comprises a controller for selectively operating the hydrogen generation module. Optionally, the controller operates the hydrogen generation module in dependence of onshore energy demand and / or energy supply from the at least one offshore renewable energy generator. Optionally, when the energy supply from the at least one offshore renewable energy generator exceeds onshore energy demand, the controller activates the hydrogen generation module.
Optionally, the controller deactivates the hydrogen generation module and energy passes from the power distribution module to the onshore power distribution network when the energy supply from the at least one offshore renewable energy generator is less than the onshore energy demand.
Optionally, the offshore jack-up installation comprises at least one renewable energy generator.
Optionally, the offshore jack-up installation comprises at least one crane for lifting the at least one offshore renewable energy generator on to a deck of the offshore jack-up installation.
Optionally, the offshore jack-up installation is arranged to move with one or more wind turbine generators loaded on the deck.
Optionally, the offshore jack-up installation comprises an energy store for storing energy generated by the at least one offshore renewable electricity generator.
Optionally, the energy store is a flywheel, a battery, a fuel cell, and / or a compressed gas energy storage.
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DK 2020 00220 A1 Optionally, the offshore jack-up installation comprises an ammonia generation module or a methanol generation module connected to the power distribution module and in fluid connection with the hydrogen generation module.
Optionally, the offshore jack-up installation comprises accommodation for the offshore jack-up installation operations and / or for the operations of at least one offshore renewable electricity generator.
In a second aspect of the invention, there is provided a method of operating an offshore jack-up installation having a hull; a plurality of moveable legs engageable with the seafloor, wherein the offshore installation is arranged to move the legs with respect to the hull to position the hull out of the water when the legs engage the seafloor, where in the method comprises: moving an offshore jack-up installation near to at least one offshore renewable electricity generator; connecting the offshore jack-up installation to the at least one offshore renewable electricity generator; and generating hydrogen from power received from the at least one offshore renewable electricity generator. In a third aspect of the invention, there is provided a method of operating an offshore jack-up installation having a hull; a plurality of moveable legs engageable with the seafloor, wherein the offshore installation is arranged to move the legs with respect to the hull to position the hull out of the water when the legs engage the seafloor, where in the method comprises: determining whether the power generated by at least one offshore renewable electricity generator is greater than the power demand by an onshore power distribution grid; and generating hydrogen from power received from the at least one offshore renewable electricity generator in determination that there is excess electricity generation. Optionally, the method comprises determining whether the power generated by at least one offshore renewable electricity generator is greater than the power demand by an onshore power distribution grid and the maximum power demand of a hydrogen generation module. Optionally, the method comprises storing energy in determination that there is an excess electricity generation. 4
DK 2020 00220 A1 Various other aspects and further embodiments are also described in the following detailed description and in the attached claims with reference to the accompanying drawings, in which:
Figure 1 shows a side view of an offshore jack-up installation according to an example; Figure 2 shows a schematic plan diagram of an offshore jack-up installation according to an example; Figure 3 shows a schematic plan diagram of an offshore jack-up installation according to an example; Figure 4 show a schematic diagram of an offshore jack-up installation according to another example; Figure 5 shows a flow diagram of the method of operation of an offshore jack-up installation according to an example; Figure 6 shows a flow diagram of the method of operation of an offshore jack-up installation according to an example; Figure 7 shows a side view of an offshore jack-up installation according to an example; Figure 8 shows a side view of an offshore jack-up installation according to an example; and Figure 9 shows a schematic plan diagram of an offshore jack-up installation according to an example.
Figure 1 shows a side view of an offshore jack-up installation 100 according to an example.
In some examples, the offshore jack-up installation 100 is a retrofitted jack- up former drilling rig.
The offshore jack-up installation 100 is floatable and comprises a hull 102. The hull 102 comprises a plurality of legs 104 which extend through the hull 102 and engage the seabed 106. The legs 104 comprise spudcans 110 which are arranged to engage the seabed 106. The offshore jack-up installation 100 is shown in an operational position with the hull 102 being positioned above the surface of the water 108. The offshore jack-up installation 100 is moveable between different locations.
When the offshore jack-up installation 100 moves between locations, the plurality of the legs 104 are retracted and the offshore jack-up installation 100 is sailed to the new location. 5
DK 2020 00220 A1 The offshore jack-up installation 100 can be towed with one or more tugboats (not shown). In some examples, the offshore jack-up installation 100 is moved adjacent to one or more offshore renewable electricity generators 120, 130 as shown in step 600 of Figure 6. Figure 6 shows a flow diagram of the method of operation of an offshore jack-up installation 100 according to an example. The offshore jack-up installation 100 comprises a main deck 112, an accommodation structure 114 for housing personnel. The accommodation structure 114 can be used for housing personnel working on the offshore jack-up installation 100 or one or more offshore renewable electricity generators 120, 130. The accommodation structure 114 can be additionally used for housing personnel working on a fixed installation production platform (not shown). Advantageously, this means that additional offshore installations providing accommodation for the offshore renewable electricity generators 120, 130 during their maintenance or installation. By providing the accommodation structure 114 on the offshore jack-up installation 100, the carbon dioxide emissions generated from providing the hotel load required for the accommodation structure 114 can be reduced because less vessels are needed. The main deck 112 of the offshore jack-up installation 100 may be used for storing equipment used in operations of the offshore renewable electricity generators 120,
130. For example, the main deck 112 can be used to store equipment used in maintenance or installation operations. In some examples, there is optionally a walk- to-work bridge 800 (as shown in Figures 2 and 8) extending between the offshore jack- up installation 100 and an offshore wind farm substation 204. In some examples, the offshore jack-up installation 100 is adjacent to the offshore renewable electricity generators 120, 130 and one or more bridges 800 extend from the offshore jack-up installation 100 and the offshore renewable electricity generators 120, 130. The bridge 800 can comprise a walkway, electrical connections, and any other suitable cable connection or pipe between the offshore jack-up installation 100 and the offshore renewable electricity generators 120, 130. Accordingly, the offshore jack-up installation 100 is connected to the at least one offshore renewable electricity generator 120, 130 as shown in step 602 of Figure 6. 6
DK 2020 00220 A1 Once the offshore jack-up installation 100 is moved into position adjacent to the offshore renewable electricity generators 120, 130 e.g. next to a wind farm, the offshore jack-up installation 100 is jacked up. In this way, the hull 102 is out of the water 108 and the offshore jack-up installation 100 is in an operational configuration. The offshore jack-up installation 100 can operate in all weather conditions because the legs 104 are fixed to the seabed 106. Advantageously, the offshore jack-up installation 100 can be moved with relative ease between different locations reducing the time of positioning and installing the offshore jack-up installation 100 next to the offshore renewable electricity generators 120, 130. The offshore jack-up installation 100 is therefore more flexible than a permanent offshore installation. In addition, in some examples the operational lifetime the offshore jack-up installation 100 is longer than the operational lifetime of offshore renewable electricity generators 120, 130 e.g. a wind turbine generator 120. Accordingly, when the offshore renewable electricity generators 120, 130 are decommissioned, the offshore jack-up installation 100 can be moved and redeployed to alongside other offshore renewable electricity generators 120, 130. In some examples, powerplant 118 is arranged to generate an electrical supply for the offshore jack-up installation 100 when the offshore renewable electricity generators 120, 130 are not operational. For example the powerplant 118 generates electricity to meet the hotel demand of the offshore jack-up installation 100. The offshore jack-up installation 100 comprises at least one power port 124 arranged to receive electrical power from the offshore renewable electricity generators 120, 130. An electrical cable 122 is connected between the power port 124 and the offshore renewable electricity generators 120, 130. The electrical cables 122, 126, 802 are represented by dotted lines. In some examples, all the connecting electrical cables122, 126 are all subsea cables running along the seabed 106 between the offshore jack-up installation 100, the anchor(s) 136 and the monopile foundation 132
132. This means that the offshore renewable electricity generators 120, 130 can generate electricity and provide electrical power to the offshore jack-up installation 100. Additional cables 126 can optionally be provided to receive electrical power from one 7
DK 2020 00220 A1 or more other offshore renewable electricity generators 120, 130. The additional cables 126 can be daisy-chained between the different offshore renewable electricity generators 120, 130. Alternatively, the additional cables 126 can each extend from the offshore jack-up installation 100 in a hub — spoke arrangement (not shown).
Figure 1 shows two different types of offshore renewable electricity generators 120,
130. A first type of offshore renewable electricity generator 120 is a wind turbine generator 120. The wind turbine generator 120 is mounted on a transition piece 128 which is fixed to a monopile foundation 132 fixed in the seabed 106. Generation of electricity from the wind turbine generator 120 is known and will not be discussed in any further detail. Other types of offshore renewable electricity generators are those that produce power from surface currents or from wave energy. One such type of current energy generator 142 is submerged and comprises a surface current turbine 134. The turbine 134 moves as water moves past the turbine 134 due to currents. Another type of generator is a floating wave energy generator 130. The wave energy generator 130 comprises a mooring plate 144 with a spar 146 and afloat 148. The float 148 is arranged to move with respect to the spar 146. The relative motion between the spar 146 and the float 148 is converted into electrical energy. Both the wave energy generator 130 and the current energy generator 142 are tethered to an anchor 136 fixed to the seabed 106. The wave energy generator 130, and the current energy generator 142 as shown in Figure 1 are examples of wave energy generator or current energy generator, but can be any other type, shape or form of wave energy generator or current energy generator. For the purposes of clarity, only the wave energy generator 130 will be referred to hereinafter. Figure 1 shows the offshore jack-up installation 100 being connected to the wave energy generator 130 and the wind turbine generator 120. Figure 1 only shows two offshore renewable electricity generators 120, 130, but there can be any number of offshore renewable electricity generators connected to the offshore jack-up installation
100. In some embodiments, the offshore jack-up installation 100 is positioned adjacent to a wind farm comprising a plurality of wind turbine generators all connected to the offshore jack-up installation 100. 8
DK 2020 00220 A1 Optionally, the offshore renewable electricity generators 120, 130 can be any type of offshore renewable electricity generator including but not limited to: wind turbine generator, wave energy generator, tidal energy generator, surface current energy generator, solar cells, geothermal energy generator, catalytic generators, or any other suitable renewable energy generator for offshore applications Optionally, the offshore jack-up installation 100 comprises one or more onboard wind turbine generators 140. In this way, the onboard wind turbine generator(s) 140 generates electricity for the offshore jack-up installation 100 without connecting to an adjacent wind farm. This means that the offshore jack-up installation 100 can be self- sufficient. The onboard wind turbine generator 140 is mounted on the deck 112 of the offshore jack-up installation 100.
Optionally, the offshore jack-up installation 100 comprises on or more onboard wave energy generators 700 and/or current energy generators 702 as shown in Figure 7. Figure 7 shows a side view of the offshore jack-up installation 100. The offshore jack- up installation 100 as shown in Figure 7 is the same as shown in Figure 1 except that the offshore jack-up installation 100 is not connected to adjacent offshore renewable energy generators 120, 130.
In some examples, the onboard wave energy generator 700 is mounted within one of the legs 104. The onboard wave energy generator 700 can be mounted in some or all of the legs 104. The leg 104 comprises a reciprocal void for receiving and guiding the float 704 of the onboard ware energy generator 700 along the length of the leg 104. In this way, the float 704 moves with respect to the leg 104 along the vertical longitudinal axis of the leg 104. The position of the float 704 with respect to the leg 104 can be adjusted in dependence of the relative position of the legs 104 to the hull 102. In other words, the position of the float 704 will be adjusted depending on how high offshore jack-up installation 100 has been jacked up. The float 704 moves within the leg 104 and relative motion of the float 704 with respect to the leg 104 is converted into electrical energy.
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DK 2020 00220 A1 The wave energy 700 and/or current energy generators 702 installed in, at or between the submerged parts of the jack-up leg 104 or the hull 102. For example, the current energy generator 702 as shown in Figure 7 is mounted in one of the legs 104. The wave energy generator 700 is fixed to the hull 102 or to the legs 104 as mentioned above.
In this way, the onboard current energy generator 702 - or wave energy generator 700 may generate electricity for the offshore jack-up installation 100 without being connected to an adjacent current- or wave energy farm.
The offshore jack-up installation 100 may comprise one or more cranes 138 and other equipment for service and maintenance of the facilities installed onboard the jack-up.
Examples of the offshore jack-up installation 100 will now be described in reference to Figure 2 and Figure 4. Figure 2 shows a schematic plan diagram of the offshore jack- up installation 100. Figure 4 shows a schematic diagram of the offshore jack-up installation 100. The offshore jack-up installation 100 comprises a power distribution module 200 mounted on the offshore jack-up installation 100. The power distribution module 200 is configured to receive the electricity generated from the offshore renewable electricity generators 120, 130 and transfer the electricity to an onshore power distribution grid 202 and / or to the power bus 400 of the offshore jack-up installation 100. In some examples the power distribution module 200 is connected to an offshore wind farm substation 204. The offshore wind farm substation 204 is connected to all the wind turbine generators 120 in a wind farm and transmits the generated electricity from all the wind turbine generators 120 from the wind farm back to the onshore power distribution grid 202. The offshore wind farm substation 204 is known and will not be discussed in any further detail.
In some examples, the power distribution module 200 can comprise a separate substation for an extended or expanded wind farm and for all the wind energy, wave energy, surface current energy and other types of renewable energy generators 700, 702 installed onboard the jack-up and otherwise perform the function of the offshore substation 204. 10
DK 2020 00220 A1 The power distribution module 200 comprises switchgear 402 such as switches, fuse, circuit breakers, fuses etc. for controlling the power distribution onboard the offshore jack-up installation 100 and from the offshore jack-up installation 100 directly, or via the offshore wind farm substation 204 back to the onshore power distribution grid 202.
As shown in Figure 2, the offshore jack-up installation 100 comprises a hydrogen generation module 206. The hydrogen generation module 206 is connected to the power distribution module 200 and is powered from electricity generated from the offshore renewable electricity generators 120, 130 and/or from the onboard renewable — energy generators 700, 702 installed on the offshore jack-up installation 100.
The hydrogen generation module 206 is optionally an electrohydrolysis module 206 for passing electricity across water and separating water into hydrogen and oxygen. The hydrogen generation module 206 is in fluid connection with a water treatment module
208. A water pump 404 pumps seawater into the water treatment module 208 which converts seawater to freshwater. In some examples, the water treatment module 208 comprises a desalination module and filters for removing the salt and other contaminants from the seawater. Other water treatment processes can be applied to the seawater for generating fresh water suitable for electrolysis.
Once the seawater has been converted into fresh water, a water pump 404 the water treatment module 208 pumps the fresh water to the electrohydrolysis module 206 for electrolysing the fresh water.
The hydrogen generation module 206 then generates hydrogen which is pumped onshore via a pipeline 210 to an onshore hydrogen distribution network 212. The produced oxygen may be safely released into the atmosphere or it may be exported to shore and/or to other offshore installations (not shown) for oxy-fuel combustion or for other industrial uses. Inthis way, hydrogen is generated from electrical power received from the at least one offshore renewable electricity generators 120, 130 and/or from the renewable energy generators 700, 702 installed on the offshore jack-up installation 100, as shown in step 604 of Figure 6.
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DK 2020 00220 A1 Alternatively, the generated hydrogen is stored on the offshore jack-up installation 100 in temporary storage facilities (not shown) and transported by a hydrogen tanker vessel.
The generated hydrogen can then be consumed as a fuel. Accordingly, the offshore jack-up installation 100 can convert an oversupply of electricity from the offshore renewable electricity generators 120, 130 into a hydrogen fuel for consumption in onshore and offshore markets. For example, the generated hydrogen can be used as a feedstock for proton exchange membrane (PEM) fuel cells in vehicles and vessels.
This means that the excess generated energy can be captured and used rather than wasted by deliberately introducing inefficiencies into the operation of the wind turbine generators 120.
In other examples, the hydrogen may be converted onboard the offshore jack-up installation 100 into other liquid- or gaseous fuel types (e.g. ammonia, methanol, DME or other) that may be better suited for storage and transport via pipelines 212 or by tanker vessels.
In some other examples as shown in Figure 9, the offshore jack-up installation 100 comprises onboard process facilities for converting hydrogen into ammonia. In this way, the generated hydrogen is transferred to an ammonia generation module 900. The ammonia generation module 900 is powered by energy generated from the offshore renewable energy generators 120, 130, similar to the hydrogen generation module 206. This means that the ammonia is generated from renewable energy, which is also known as “green ammonia’. The ammonia generation module 900 receives the generated hydrogen and nitrogen obtained from an air separation module (not shown). The air separation module extracts nitrogen from the atmosphere and sends it to the ammonia generation module 900. Ammonia is then generated using the Haber-Bosch process which is known and will not be discussed any further. The generated ammonia is then transported via vessel or pumped onshore similar to the previously discussed green hydrogen production as shown in Figures 1 to 4.
In some other examples, the offshore jack-up installation 100 comprises onboard process facilities for converting hydrogen into methanol. In this way, the generated 12
DK 2020 00220 A1 hydrogen is transferred to a methanol generation module. The ammonia generation module 900 as shown in Figure 9 is replaced with a methanol generation module instead. The methanol generation module generates methanol from the generated hydrogen and carbon dioxide. The carbon dioxide may be captured directly from the atmosphere or it may be imported from carbon capture facilities onshore/offshore. The methanol generation module is powered by energy generated from the offshore renewable energy generators 120, 130, similar to the hydrogen generation module
206. Methanol is then generated from the hydrogen which is known and will not be discussed any further. The generated methanol is then transported via vessel or pumped onshore similar to the previously discussed green hydrogen production as shown in Figures 1 to 4.
In another example, the power distribution module 200 can receive power from onshore hydro energy generators via the onshore power distribution grid 202.
Therefore in the case that the offshore renewable electricity generators 120, 130 are not generating any power, the hydrogen generation module 206 can still generate hydrogen if there is an excess of onshore renewable energy.
Examples of the offshore jack-up installation 100 will now be described in reference to Figure 3. Figure 3 shows a schematic plan diagram of the offshore jack-up installation
100.
The offshore jack-up installation 100 is the same as discussed in reference to Figure 2 except that the power distribution module 200 is also connected to an energy store
300. The energy store 300 is coupled to the power bus 400 and the electricity generated by the offshore renewable electricity generators 120, 130 is stored in the energy store 300. The energy store 300 is configured to discharge and transmit electrical energy to the power bus 400 as required.
In another example, if the amount of excess electricity generated by the offshore renewable electricity generators 120, 130 exceeds the demand from the onshore power distribution grid 202 and the maximum hydrogen generating capacity of the electrohydrolysis module 206 combined, the surplus generated electricity can be stored in the energy store 300.
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DK 2020 00220 A1 In some examples, the stored energy in the energy store 300 is used to power the electrohydrolysis module 206 and / or transmit energy to the onshore power distribution grid 202. The stored energy in the energy store 300 may discharged when the offshore renewable electricity generators 120, 130 are not generating excess electricity. Alternatively or additionally, the energy store 300 can be discharged to smooth the generation curve during variable weather e.g. when the wind periodically stops blowing.
The energy store 300 can be one or more of the following: battery 302, flywheel 304, compressed air energy store 306 or any other suitable means for storing and releasing energy. The energy store 300 is connected to the power bus 400 by a DC to AC or bidirectional converter (not shown) so that the energy store 300 can discharge electrical power to the power bus 400.
The offshore jack-up installation 100 comprises a controller 404 for selectively controlling the power distribution module 200. The controller 404 controls whether the power distribution module 200 transmits electricity to the power bus 400, transmits electricity to the onshore power distribution grid 202 or both at the same time.
Furthermore, the controller 404 is configured to control the amount of electricity transmitted to the power bus 400.
In some examples, the controller 404 determines how to control the power distribution module 200 based on received information. The received information can comprise information relating to one or more of the following: current demand of the onshore power distribution grid 202, current supply of electrical power from the offshore renewable electricity generators 120, 130, the weather, sea conditions or any other parameter information.
Information relating to the current demand of the onshore power distribution grid 202 may be transmitted from the onshore power distribution grid 202 to the controller 404. Information relating to the current supply of electrical power from the offshore renewable electricity generators 120, 130 may be transmitted from the power distribution module 200 to the controller 404. The controller 404 may be further 14
DK 2020 00220 A1 connected to one or more sensors 406 for providing additional information e.g. wind speed sensors, water speed sensors or other environmental sensors.
Turning to Figure 5, a method of controlling the offshore jack-up installation 100 will now be discussed. Figure 5 shows a method performed by the controller 404 according to some examples. In step 500, the controller 404 determines whether the current supply of electrical power Egen from the offshore renewable electricity generators 120, 130 is greater than the current demand Edem Of the onshore power distribution grid 202. If the controller 404 determines that there is an excess in power generation, then the controller 404 sends a signal to the power distribution module 200 to activate the electrohydrolysis module 206 and start generating hydrogen as previously discussed as shown in step
502. The hydrogen (or the other fuel types generated onboard from the hydrogen-fuel transformation plant) is sent onshore as shown in step 504 and as previously discussed. At the same time as the electrohydrolysis module 206 is generating hydrogen, the power distribution module 200 transmits electrical power to the onshore power distribution grid 202 as shown in step 506. If the controller 404 determines that there is a deficit in power generation, then the controller 404 sends a signal to the power distribution module 200 to only transmits electrical power to the onshore power distribution grid 202 as shown in step 506. In — this case, the electrohydrolysis module 206 is inactive. In step 508, the controller 404 determines whether the current supply of power Egen from the offshore renewable electricity generators 120, 130 is greater than the current demand Edem Of the onshore power distribution grid 202 and the maximum electrical power demand of the electrohydrolysis module 206 Emax hya. If the controller 404 determines that there is an excess in power generation, then the controller 404 sends a signal to the power distribution module 200 to activate the electrohydrolysis module 206 and store energy in the energy store 300 as shown in Figure 510. 15
DK 2020 00220 A1 In another example there is offshore jack-up installation 100 as shown in Figure 8. Figure 8 shows a side view of the offshore jack-up installation 100. The offshore jack- up installation 100 is the same as discussed in reference to the examples shown in Figure 1. However, the offshore jack-up installation 100 is positioned adjacent to the offshore wind farm substation 204. A bridge 800 is positioned extending between the offshore wind farm substation 204 and the offshore jack-up installation 100. The interconnecting cable 802 between the offshore jack-up installation 100 and the substation 204 is routed along the connecting bridge 800.
In other examples, the offshore jack-up installation 100 may be replaced with another type of offshore installation e.g. a floating rig, a mobile offshore drilling unit (MODU), a semisubmersible rig or similar ship design.
Advantageously an existing offshore windfarm can be retrofitted with an offshore jack- up installation 100 (or semisubmersible) platform adjacent and connected to the windfarm power sub-station 204, while holding all the necessary facilities onboard for generating hydrogen (and or other fuels) out of excess renewable energy. Additionally, the offshore jack-up installation 100may provide offshore accommodation-, transit-, general logistics and "service-island” facilities for the windfarms and other offshore installations in the area. This means that the offshore jack-up installation 100 will act as a service centre for the offshore renewable energy generators 120, 130. This means that equipment for servicing the offshore renewable energy generators 120, 130 does not have to be transported as far. As an early phase solution for offshore "green hydrogen” production, the converted drilling jack-up rig will provide a relatively low cost entry-level platform solution with ample space and capacity for all the necessary installations while being easy to install and decommission after end-of-life service. The converted drilling jack-up rig may also provide a convenient means for upgrading the onboard facilities and for structural maintenance of the platform and leg structures by taking it back to shore at half-life for the necessary upgrade works before being returned to the offshore renewable energy production site. In another embodiment two or more embodiments are combined. Features of one embodiment can be combined with features of other embodiments.
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DK 2020 00220 A1 Embodiments of the present invention have been discussed with particular reference to the examples illustrated.
However it will be appreciated that variations and modifications may be made to the examples described within the scope of the invention. 17
Claims (23)
1. An offshore jack-up installation comprising: a hull; a plurality of moveable legs engageable with the seafloor, wherein the offshore installation is arranged to move the legs with respect to the hull to position the hull out of the water when the legs engage the seafloor; a power distribution module connectable to at least one offshore renewable electricity generator; and a hydrogen generation module connected to the power distribution module.
2. An offshore jack-up installation according to claim 1 wherein the at least one offshore renewable electricity generator is one or more of a wind turbine generator, a wave energy generator, current energy generator, catalytic generator and / or a solar cell
3. An offshore jack-up installation according to claims 1 or 2 wherein the power distribution module is connectable to a plurality of offshore wind turbine generators in a wind farm.
4. An offshore jack-up installation according to any of the preceding claims wherein the power distribution module is connectable to an onshore power distribution network.
5. An offshore jack-up installation according to any of the preceding claims wherein the hydrogen generation module is in fluid connection with an onshore gas pipeline.
6. An offshore jack-up installation according to any of the preceding claims wherein the hydrogen generation module is in fluid connection with a storage tank.
7. An offshore jack-up installation according to any of the preceding claims wherein the hydrogen generation module is configured to electrolyse water. 18
DK 2020 00220 A1
8. An offshore jack-up installation according to any of the preceding claims wherein the offshore jack-up installation comprises a seawater treatment module arranged to generate fresh water for the hydrogen generation module.
9. An offshore jack-up installation according to any of the preceding claims wherein the offshore jack-up installation comprises a controller for selectively operating the hydrogen generation module.
10. An offshore jack-up installation according to claim 9 wherein the controller operates the hydrogen generation module in dependence of onshore energy demand and / or energy supply from the at least one offshore renewable energy generator.
11. An offshore jack-up installation according to claim 10 wherein when the energy supply from the at least one offshore renewable energy generator exceeds onshore energy demand, the controller activates the hydrogen generation module.
12. — An offshore jack-up installation according to claim 11 when dependent on claim 4 wherein the controller deactivates the hydrogen generation module and energy passes from the power distribution module to the onshore power distribution network when the energy supply from the at least one offshore renewable energy generator is less than the onshore energy demand.
13. An offshore jack-up installation according to any of the preceding claims wherein the offshore jack-up installation comprises at least one renewable energy generator.
14. An offshore jack-up installation according to any of the preceding claims wherein the offshore jack-up installation comprises at least one crane for lifting the at least one offshore renewable energy generator on to a deck of the offshore jack-up installation.
15. An offshore jack-up installation according to any of the preceding claims wherein the offshore jack-up installation is arranged to move with one or more wind turbine generators loaded on the deck.
19
DK 2020 00220 A1
16. An offshore jack-up installation according to any of the preceding claims wherein the offshore jack-up installation comprises an energy store for storing energy generated by the at least one offshore renewable electricity generator.
17. — An offshore jack-up installation according to claim 16 wherein the energy store is a flywheel, a battery, a fuel cell, and / or a compressed gas energy storage.
18. An offshore jack-up installation according to any of the preceding claims wherein the offshore jack-up installation comprises an ammonia generation module or a methanol generation module connected to the power distribution module and in fluid connection with the hydrogen generation module.
19. An offshore jack-up installation according to any of the preceding claims wherein the offshore jack-up installation comprises accommodation for the offshore jack-up installation operations and / or for the operations of at least one offshore renewable electricity generator.
20. A method of operating an offshore jack-up installation having a hull; a plurality of moveable legs engageable with the seafloor, wherein the offshore installation is arranged to move the legs with respect to the hull to position the hull out of the water when the legs engage the seafloor, where in the method comprises: moving an offshore jack-up installation near to at least one offshore renewable electricity generator; connecting the offshore jack-up installation to the at least one offshore renewable electricity generator; and generating hydrogen from power received from the at least one offshore renewable electricity generator.
21. A method of operating an offshore jack-up installation having a hull; a plurality of moveable legs engageable with the seafloor, wherein the offshore installation is arranged to move the legs with respect to the hull to position the hull out of the water when the legs engage the seafloor, where in the method comprises: 20
DK 2020 00220 A1 determining whether the power generated by at least one offshore renewable electricity generator is greater than the power demand by an onshore power distribution grid; and generating hydrogen from power received from the at least one offshore renewable electricity generator in determination that there is excess electricity generation.
22. A method according to claim 21 wherein the method comprises determining whether the power generated by at least one offshore renewable electricity generator is greater than the power demand by an onshore power distribution grid and the maximum power demand of a hydrogen generation module.
23. A method according to claim 22 wherein the method comprises storing energy in determination that there is an excess electricity generation.
21
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA202000220A DK180902B1 (en) | 2020-02-24 | 2020-02-24 | An offshore jack-up installation and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA202000220A DK180902B1 (en) | 2020-02-24 | 2020-02-24 | An offshore jack-up installation and method |
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| Publication Number | Publication Date |
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| DK202000220A1 true DK202000220A1 (en) | 2021-12-21 |
| DK180902B1 DK180902B1 (en) | 2022-06-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023132821A1 (en) * | 2022-01-05 | 2023-07-13 | Siemens Energy Global GmbH & Co. KG | System and method of constructing a plant on a power island |
| NO347251B1 (en) * | 2022-03-09 | 2023-08-14 | Int Energy Consortium As | System for Offshore Hydrocarbon Production with both Externally and Internally Variable Electric Power Generation with Energy Distribution Hub |
| WO2024085772A1 (en) * | 2022-10-21 | 2024-04-25 | Aker Solutions As | Floating electricity distribution platform for electricity distribution at offshore locations comprising a semi-submersible hull |
-
2020
- 2020-02-24 DK DKPA202000220A patent/DK180902B1/en active IP Right Grant
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023132821A1 (en) * | 2022-01-05 | 2023-07-13 | Siemens Energy Global GmbH & Co. KG | System and method of constructing a plant on a power island |
| NO347251B1 (en) * | 2022-03-09 | 2023-08-14 | Int Energy Consortium As | System for Offshore Hydrocarbon Production with both Externally and Internally Variable Electric Power Generation with Energy Distribution Hub |
| WO2024085772A1 (en) * | 2022-10-21 | 2024-04-25 | Aker Solutions As | Floating electricity distribution platform for electricity distribution at offshore locations comprising a semi-submersible hull |
Also Published As
| Publication number | Publication date |
|---|---|
| DK180902B1 (en) | 2022-06-21 |
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Effective date: 20220621 |