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Targeted Offshore Acoustic Deterrents

fauna guard fig 1Marine Life Protection
Acoustic mitigation devices are one of industry-standard solutions for preventing adverse effects of marine infrastructural development works, such as physical interaction with construction equipment or exposure to high levels of underwater sound, they are able to temporarily remove wildlife from a project site and potentially harmful activities. However, not all acoustic mitigation devices are the same, FaunaGuard is a set of species-specific devices which are available for marine contractors and other interested parties to hire. These innovative, welfare-first modular devices create a marine mammal exclusion zone by targeting their respective hearing ranges and repelling them with specialised underwater sound patterns.
 
By Andrew Gillespie, Marine Protection Products Manager, Ace Aquatec, UK

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Why the Future of Offshore Boring is Subsea

Fig 1 FugroHow the Wind Industry Can Accelerate Construction and Deployment
As demand for carbon-neutral energy production increases around the world, wind generation has gone from strength to strength. Global power output by these means grew by a record 273 TWh in 2021, according to an IEA report (1) – 55 % higher growth than was achieved in 2020. Much of this capacity was driven by new onshore capacity, which is now present in 115 countries around the world. But offshore, the picture is very different. Just 19 countries currently have these kinds of deployments showing the progress we still need to make.
 
By Peter Richards, Chief Engineer, Fugro, UK

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Aeroelastic Instabilities on Incomplete Wind Turbines During Installation

iWind table1Reducing Installation Costs by Leaving Blades Unattended?
iWind Renewables has provided technical consulting services addressing the assessment of aeroelastic instabilities on incomplete wind turbines (with one or two blades assembled) during installation or maintenance. A wide list of wind turbine configurations of rated power spanning from 2 to 6+MW was analysed, with short or tall, steel or concrete towers. Both mechanisms that potentially trigger aeroelastic instabilities were examined, i.e. stall- and vortex-induced vibrations, at all relevant rotor and tower modes. It was concluded that single- and two-bladed setups may be left unattended for a reasonable time (in the order of weeks) if properly designed and analysed, allowing for a reduction in installation costs. The methodology applied, demonstrative results and key parameters that affect stability are presented and discussed in this article.
 
By Dimitris Manolas and Panagiotis Chaviaropoulos, iWind Renewables, Greece

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Intelligent Welding Technology for Offshore Wind Industry

IMG 1056Bringing the Robot to the Job
Inrotech, based in Odense in Denmark, is a provider of robotic welding solutions that break with traditional methods of manufacturing. Inrotech has a history of providing welding automation since the mid-1990s, developing its first product for the shipbuilding industry. Nowadays, it provides automated welding solutions for other heavy industries and the offshore wind industry, where the correct technology is essential for the welding of large and complex structures.
 
By Philip Toft Halskov, Marketing Manager, Inrotech, Denmark

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Superconducting Transmission Cables

Offering Benefits Compared with Conventional HVDC Copper Cables in Offshore Grids
SuperNode Figure 1Subsea superconducting transmission cables, a new innovative cable technology, were shown to offer greater economic benefits to the energy system than conventional high-voltage, direct current (HVDC) copper technology in a 2050 offshore grid. The University of Strathclyde, Glasgow, Offshore Renewable Energy Catapult, UK, and SuperNode, Ireland, have conducted technical and techno-economic studies analysing the potential benefits of high-temperature superconductor subsea transmission cables compared with conventional copper 525kV HVDC cable technology.
 
By Maria O’Neill, Technology Analyst, SuperNode, Ireland

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Optimised Operation of Wind Power Plants Using Digital Data

Wind Power Performance Data Exchange – WiPPeX
VGBE Figure 1Data-supported operation and maintenance optimisation can help operators of wind turbines reduce possible downtime and identify production increases. This requires continuous monitoring or analysis of the sensor data provided. This data is key to understanding turbine performance, managing expectations of operational assets and identifying opportunities for optimising performance. Databases provide the ability to access a large heterogeneous pool of data, allowing for much more accurate identification of, for example, trends in age or deviations in plant performance. Depending on the operator’s preference, different key performance indicators can be created and benchmarks for competitors established.
 
By Robert Rogotzki and Mario Bachhiesl, vgbe energy, Germany

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Inter-Array Layout Optimisation Tool

Idom figure 1Techno-Economic Tool for the Optimisation of Offshore Wind Farms Using a Genetic Algorithm
The offshore wind industry has developed rapidly during recent years and is expected to continue expanding over the coming decades. The industry is moving forward, and bigger wind farms are being installed all over the world. Despite the increase in the number of wind farms, the initial investments and operation costs are still relatively high. Reducing the total costs associated with offshore wind farms is crucial to limit economic risks and attract new investors. One of the most notable parts of the total cost is associated with electricity exportation, which is highly influenced by the strategy defined to interconnect the turbines. With the objective of reducing these costs, this article presents a genetic-algorithm-based techno-economic tool that optimises the electric layout considering the loss of revenue due to electric losses inside the wind farm and the purchasing cost of electric cables.
 
By Mikel Rosell Diez, Engineer, IDOM Consulting, Engineering, Architecture, Spain

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