Successful Testing of
Wave Energy Converter
The European Marine Energy Centre (EMEC) Ltd. has issued a performance statement following dry testing of CorPower’s wave energy converter (WEC), C3, in Stockholm. The testing involved CorPower’s power take-off (PTO) on the hardware-in-the-loop (HIL) test rig, designed to test the PTO onshore as part of the Wave Energy Scotland (WES) funded Hi-Drive project.
The purpose of the HIL rig is to enable onshore testing and provide verification of WEC machinery subsystems before deployment. The rig emulates loads and motions representative of a complete range of expected sea states.
The dry test program performed over seven months included 708 registered test runs, with 378 signals being measured providing more than 1 TB of data on the equipment. Each specified function was tested, starting with gentle loading, allowing safety and machine control to be verified while stabilizing the operation. Having built confidence at low sea states, the loading was gradually ramped up, verifying the performance on the range of operation up to full-range storm waves. The WaveSpring phase control method was verified, with subsystem efficiency of 99 percent at rated loading. The test campaign was finalized with a two-week noninterrupt test.
Following the dry tests in Sweden, C3 was transported to Orkney. The half-scale WEC was deployed in January 2018 at EMEC’s scale test site at Scapa Flow in Orkney with support from the Interreg_NWE FORESEA program.
C3 tests were scheduled to end this summer, leading into the development of the next-generation WEC technology.
New OTEC Concept
Eliminates Pipes, Pumping
A small start-up in France has secured a patent for ocean thermal energy conversion (OTEC) technology using phase-change materials (PCM). The technology involves filling a container with material in a liquid state that has a solidification temperature that varies according to the composition of the material. The container filled with PCM is lowered by ballasting to a depth where the water is sufficiently cold.
When the PCM becomes solid and enough cold accumulates, the container is raised by deballasting to the surface where the water temperature is warmer. The cold material in the warm surface environment then allows the production of electricity by a thermal machine. This technique eliminates the need for pipes and pumping of seawater from the depths to the surface.
This invention is based on the principle of latent heat, which enables separation of the power plant producing electricity from the containers filled with PCM, allowing a continuous production of electricity by synchronization of several containers alternating at depth and on the surface.
This technology, yet to be tested, could provide electricity, water and hydrogen far from the coast. Repurposing obsolete oil platforms for this technology is a possibility.
More information is available at https://bit.ly/2MTPFTK.
At Hornsea Two
Fugro has commenced marine site characterization work at the Hornsea Two offshore wind farm. The contract, awarded by renewable energy company Ørsted, covers geotechnical site investigation and follows other contracts awarded earlier this year for the site.
The geotechnical data acquired by Fugro will support the development of the ground model, assist design activities for the turbine foundations and inform cable route design at the Hornsea Project Two and Hornsea Project Three sites. Fugro’s workscope includes seabed and downhole geotechnical investigations that will be undertaken using state-of-the-art equipment from Fugro’s specialist vessels.
Fugro will deliver this offshore project using its new SEACALF MkIV system for seabed cone penetration testing.
Another Tidal Turbine
Deployed in Nova Scotia
Cape Sharp Tidal has deployed for the second time an in-stream tidal turbine and connected it to the power grid at the Fundy Ocean Research Center for Energy (FORCE) site in Nova Scotia’s Minas Passage.
Cape Sharp Tidal’s first demonstration turbine was deployed and grid-connected in November 2016 and recovered in June 2017.
The turbine is now undergoing initial commissioning, with operational and environmental monitoring device testing being conducted by the OpenHydro team.
The project team used the previously deployed turbine and environmental monitoring devices to inform upgrades to the turbine technology and the environmental monitoring program.
‘Dig-It’ Starts Work
Soil Machine Dynamics Ltd. (SMD) announced that the QTrencher 1600 and its associated deck equipment package were delivered to Van Oord, and it has commenced its first job at Borkum-2 wind farm.
Van Oord’s deck equipment for the QT1600, Dig-It, included a 48Te launch and recovery system (LARS) with A-Frame, cursor docking head, umbilical winch with snatch limiter and hydraulic power unit ensuring safe and reliable deployment of the QTrencher 1600 in higher sea states.
The Borkum-2 offshore wind farm, to be ready in 2019, is located 54 km off the coast of Germany.
Mooring Rope Recycling
Lankhorst Ropes has set up a mooring rope recycling initiative for the cruise industry. Available at the main cruise terminals in Florida, the retired ropes can be repurposed as picnic sets, plastic poles, planks and even complete landing stages, riverbank bank protection boards and bridges.
Cruise lines use some of the most innovative recycling, reducing and reusing strategies in the world. The mooring rope recycling initiative will assist the cruise lines in going further by repurposing synthetic-fiber mooring lines previously sent to landfill. The Lankhorst rope recycling initiative is scheduled to become available at the following cruise terminals: Port of Miami, Port Everglades and Port Canaveral.
More than 15 years ago, Lankhorst Ropes introduced the rope industry’s first recycling scheme for retired maritime ropes.
From Tank to Tidal Channel
The recently completed InSTREAM project assessed fundamental differences in turbulent flow measured in the field, generated in a tank and simulated in a numerical model.
To mitigate the risk and uncertainty associated with turbulent flows in tidal channels, developers often use tank experiments and numerical simulations to assess the power and loading performance of a turbine. However, it remains unclear if these controlled flows can be accurately scaled up to represent the natural turbulence present in tidal channels.
The difficulty in translating between model, tank and field environments motivated the In-Situ Turbulence Replication, Evaluation And Measurement (InSTREAM) project. The three-year project was conducted by a research consortium comprising six commercial and academic entities in the U.K. and Canada. The project was given the prestigious EUREKA designation and was co-funded by the Offshore Energy Research Association and InnovateUK.
As expected, the InSTREAM project found significant differences between the turbulence characteristics in the tank and in the field. The 3D eddies observed in the field were about three times larger than those generated in the tank, resulting in considerable differences in power and fatigue loading.
A scaling method has been developed to allow direct comparison and translation between the two flow regimes. This scaling greatly increases the usefulness of tank testing and numerical modeling and can be reproduced for other test tanks. It also allows site-specific field measurements to be translated to tank experiments, enabling numerical models (validated by tank experiments) to be used for reliable and realistic estimation of turbine and array performance.
GRT for Siemens
MacArtney will supply another generator rotation tool (GRT) to Siemens Gamesa Renewable Energy. The GRT creates efficient solutions for long-term storage of nacelles and helps ensure max lifespan of turbines.
The nacelles are subject to long-term storage and therefore require maintenance to prevent bearing degradation during standstill. If not regularly rotated, the main bearings may suffer corrosion and quality damage, so it’s important to keep components well lubricated at all times.
The battery-powered, radio-controlled mobile unit supplied by MacArtney is remotely driven under the nacelle with hub and mounted generator, while the nacelle is stored on its transport frame.
Site Survey for
Netherlands Wind Farm
Fugro has commenced a site characterization program at the Hollandse Kust (noord) Wind Farm zone. Carried out under a further contract for the Netherlands Enterprise Agency (RVO.nl, part of the Ministry of Economic Affairs and Climate Policy), the geotechnical workscope comprises seabed investigations and borehole drilling at two lots. Other deliverables include standard and advanced laboratory testing and an integrated geological/geotechnical soil model that will be used by future developers of the wind farm to prepare their bids.
The fieldwork runs from April to June from Fugro vessels. Deployment of two of Fugro’s most recent technical innovations will enhance safety and bring improved operational efficiency to the project. The team of geophysical, geological and geotechnical experts will complement the technology to optimize an integrated deliverable.
With a total capacity of 700 MW, the Hollandse Kust (noord) Wind Farm Zone is located 10 nautical miles off the west coast of the Netherlands.
For Wind Turbines
Independent wind asset operations management specialist OutSmart BV has selected Kongsberg Digital AS to provide an integrated management system on the innovative Kognifai digital platform and ecosystem. The sophisticated digital solution will be used to manage OutSmart’s extensive onshore and offshore wind turbine portfolio.
OutSmart provides services to wind farm owners, fund managers and wind project companies in northwestern Europe to maximize the revenues of their wind assets. Part of Deutsche Windtechnik Offshore and Consulting GmbH, OutSmart currently operates more than 400 onshore and offshore wind and solar assets (1.8 GW in total) in Germany, the Netherlands and the U.K.
With a common digital platform providing data storage and data security for the asset owner, the new applications will rationalize the operations of OutSmart and its clients and provide access to proven tools, including advanced analytics.
Gangway System for
Arkona Offshore Wind Farm
Vroon Offshore Services and Ampelmann have joined forces to deploy a walk-to-work (W2W) solution for the Arkona offshore wind farm in the German Baltic Sea. Vroon’s VOS Stone vessel, the newest addition to its offshore support fleet, will be mobilized with an Ampelmann A400 gangway system.
The gangway, launched in 2017, will be utilized for the first time for W2W operations during array cabling work and commissioning of the Arkona offshore wind farm. The project should finish by September.
Testing at EMEC
CorPower Ocean has successfully installed its half-scale C3 wave energy converter (WEC) at the European Marine Energy Centre (EMEC) in Orkney, Scotland.
The C3 point absorber was installed at EMEC’s Scapa Flow scale test site in collaboration with local marine contractor Green Marine (UK) Ltd. The device was towed to site and the surface-operated install sequence was successfully performed from a vessel.
The C3 WEC was connected to a floating microgrid unit provided by EMEC.
The microgrid has been designed to allow the C3 device to behave as if it were grid connected by providing a stable voltage and frequency reference, simulating the impedance of a typical grid connection, absorbing power from the device under test and providing power to auxiliary systems.
This ocean deployment is looking to prove off-grid operations to address market segments such as islands, offshore installations or remote coastal locations.
Legislation in Nova Scotia
The government of Nova Scotia has proclaimed the Marine Renewable-energy Act, a major milestone for Canada’s marine renewable energy sector. It provides a framework for the governance and development of marine renewable energy resources, including tidal, wave and offshore wind energy. Key features include the designation of areas of priority for development, as well as a licensing and permitting regime.
A demonstration permitting program is now open, allowing proponents to seek up to 5 MW for demonstration of a project. The program has a cap of 10 MW and requires all applicable permits and approvals in place.
Kraken in Germany Wins
Support for Offshore Wind
Kraken Robotics Inc.’s German subsidiary, Kraken Robotik GmbH, was named a winner in the Carbon Trust’s Offshore Wind Accelerator (OWA) competition, an R&D program funded by nine leading offshore wind developers and the Scottish government to reduce the cost of offshore wind energy. Kraken Robotik was among four companies selected in the competition.
Kraken will receive hands-on mentoring and advice from the OWA industry partners, which collectively represent more than 75 percent of the European offshore wind market, as well as a potential opportunity to demonstrate its SeaVision 3D underwater laser imaging system on installed foundations at a fully operational wind farm in Europe. The aim of the competition is to help advanced technologies access the large emerging market and become part of the normal subsea inspection strategy for offshore wind developers.
AUV Docking Station for
Offshore Wind Inspection
Modus Seabed Intervention is developing an innovative approach to enable AUVs to remain at offshore wind farm sites without a support vessel. The move could shave £1.1 billion from the operating cost of Europe’s offshore wind farms and would be a world first in the sector.
Modus Seabed Intervention, in partnership with Osbit Ltd. and the Offshore Renewable Energy (ORE) Catapult, is trialing an AUV docking station to enable vehicle recharging, upload of acquired data and download of mission commands.
The use of AUVs to survey and inspect offshore wind farm subsea infrastructure is a relatively new cost-efficiency measure in this sector. In addition to the estimated £1.1 billion savings across the current 11-GW offshore wind farm fleet over the next 25 years, the scheme will also significantly reduce the need for staff to work in often hazardous environments.
The Autonomous Vehicle for the Inspection of offshore wind farm Subsea INfrastructure (AVISIoN) project has received funding from Innovate UK for further development, testing and demonstrations of Modus’s existing hybrid AUV capability and docking station. Testing will take place at ORE Catapult’s National Renewable Energy Centre in Blyth, Northumberland.
Deep Green Tech
Nearing Utility Scale
The gravity base structure foundation for Minesto’s first commercial-scale installation of its Deep Green technology has been delivered, marking significant progress toward the first installation in Holyhead Deep. Preparation for offshore testing is in it final stages. Minesto’s DG500 project involves installing and demonstrating Deep Green, which produces electricity from ocean currents, at utility scale at the Holyhead Deep site off the coast of northwest Wales. Offshore installation of the 500-kW device and the surrounding test setup infrastructure is to start in April, with system functionality and capacity tests to be conducted in the second quarter. The aim is to generate electricity in the third quarter this year.
Funding to Advance
Clean Energy in Canada
The University of Victoria (UVic) is getting $2.4 million in new funding to accelerate clean energy projects. The funding is from the government of Canada and the Dennis and Phyllis Washington Foundation in conjunction with Seaspan.
An investment of $1.4 million will establish the Pacific Regional Institute for Marine Energy Discovery (PRIMED) at UVic. The institute will help develop and commercialize wind, wave and tidal energy technologies and help support the adoption of alternative technologies in remote coastal communities.
A $1 million investment will significantly advance the work of the green transportation research team at UVic’s Institute for Integrated Energy Systems. The funding will move forward solutions for heavy-duty marine, mining and transportation sectors working to meet their greenhouse gas reduction targets and climate change mitigation goals.
Wind Energy Economical
For Ship Propulsion
Analysis from BMT has revealed that the wingsail technology pioneered by Oceanfoil could achieve an average fuel consumption and emissions savings of 14 percent on a mid-sized tanker vessel and up to 20 percent in certain wind and sea conditions.
The results put renewable wind energy for ship propulsion in a key role as the shipping industry seeks to lower its carbon footprint and save fuel costs.
The assessment considered a system of four Oceanfoil wingsails over the course of a year on a 183-m, 50,000-tonne deadweight Panamax vessel operating in the north Atlantic. The study identifies the thrust benefits for all wind angles around the ship and uses the average to define the Oceanfoil wingsail thrust at a given ship and wind speed.
Oceanfoil is in discussions with its classification society to obtain approval for its proposed advanced all-weather camera solution to provide enhanced bridge visibility that would ensure compliance with IMO regulations.
Dudgeon Now Powering
The Dudgeon offshore wind farm 40 km off the coast of Norfolk, England, is officially open. All 67 turbines at the 402-MW farm are now delivering electricity to the U.K. grid, providing renewable energy to about 410,000 homes. Dudgeon is a key part of Statoil’s strategy to complement its oil and gas portfolio with profitable renewable energy solutions.
It is estimated that the installed capacity of offshore wind in Europe can grow from 12 GW in 2016 to 70 GW in 2030.
MacArtney Winches for
The Borkum Riffgrund Offshore Wind Farm 2 is located in the North Sea approximately 55 km off the northwest coast of Germany and is one of the world’s biggest offshore wind farms. It comprises 56 wind turbines and will power 460,000 homes annually.
MacArtney provided winches for the wind farm to pull both interarray cables and export cables into the substation that forms the heart of the wind farm, collecting and exporting power generated by turbines through specialized submarine cables.
Sparrows Expands Wind Energy Market Presence
Sparrows Group has acquired Danish wind energy specialist Alpha Offshore Service A/S. Already a supplier of capital equipment to the wind energy industry, the deal significantly strengthens the group’s operations and maintenance capabilities in the sector.
Alpha Offshore provides engineering personnel and inspection services to the energy industry, specializing in the delivery of operations and maintenance, and supervisory and commissioning services to onshore and offshore wind developments. The company will continue to be run under the same management as a separate entity within the Sparrows Group, ensuring operational consistency while providing access to a wider pool of expertise and resources.
Canada Funds Clean Tech
For Fisheries, Aquaculture
The government of Canada launched a program that will provide up to $20 million over four years to help Canada’s fisheries and aquaculture industries incorporate existing clean technologies into their day-to-day operations. Potential projects include helping fish harvesters convert their vessels to clean alternative fuels and reducing energy use on aquaculture sites. Clean technology and innovation are key components of the government’s approach to promoting clean economic growth. The Fisheries and Aquaculture Clean Technology Adoption Program will provide funding to help a sector made up of primarily small and medium-sized businesses adopt innovative clean technologies that otherwise may not be possible.
Load Shackles for Tidal Energy Data Monitoring
Strainstall has been selected to provide two of its load shackles to increase the survivability and reliability of a floating tidal energy converter (TEC) platform for Sustainable Marine Energy Ltd. (SME). PLAT-I hosts four SCHOTTEL SIT250 turbines. Following installation of PLAT-I by SME, instrumentation and data gathering are being carried out for a project in partnership with Swansea University. Strainstall’s load shackles will be installed on PLAT-I to help better understand the effects of extreme conditions and fatigue loads on TECs.