Power & Energy Solutions

The premier renewable energy publication

Data can be our crystal ball. With advanced analytical tools, we can harness the flow of data from turbines, solar cells, dams, our organisations and even external sources, such as energy markets, to optimize performance and earnings. You can look into the future, now. Businesses thrive on predictability. Stable demand, stable supply, stable operations and, if we’re doing it right, stable growth and positive development that leaves us, and all our stakeholders, with stable smiles on our faces. However, renewables are unpredictable. The supply of energy we convert is inherently unstable – it fluctuates according to the whims and fancies of a power beyond our control, that of Mother Nature. Hydropower is perhaps the exception, as dams offer operators a steady means of power storage and production. All we have to do is, quite literally, turn on the tap. Nevertheless, unpredictable weather patterns, such as prolonged dry periods, can impact upon even this most proven and reliable of renewable sources. So, how do we bring predictability into this new energy arena? We can’t tame Mother Nature, but we can learn from her, from ourselves, from our equipment, and from the energy market to continually adapt and optimize our assets and operations. In doing

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Jan De Nul Group was contracted by Ørsted to transport and install 36 monopile foundations and the scour protection works around all 56 foundations for the Borkum Riffgrund 2 offshore wind farm. The cable installation works connecting the OWF to the offshore substation were also executed by Jan De Nul on behalf of TenneT. Thus, proving the efficiency of a bolted connection between MP and TP. Germany continues to invest in green energy. By early 2019 approximately 460,000 additional households will be provided with sustainable wind-generated electricity by the Borkum Riffgrund 2 Offshore Wind Farm. Borkum Riffgrund 2 counts 56 Vestas turbines of 8MW each, resulting in a total capacity of 450 MW. Twenty turbines were installed on 50-metre-high jackets with 10-metre-high suction buckets. Thirty-six other turbines were placed on top of monopile foundations. In the summer of 2016, the owner and developer Ørsted Wind Power A/S awarded the contract for the installation of the monopile foundations to the Jan De Nul Group. The scope comprised the temporary storage, transport and installation of 36 monopile foundations (MPs), 36 Transition Pieces (TPs) bolted on top of the MPs, and the anode cages. The Jan De Nul Group was also responsible for the supply,

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Some years ago, the offshore wind industry was primarily a high-priced and tough European adventure. But, mainly as a consequence of intense private-public collaborations in the key countries nearby Irish, North and Baltic seas, this situation has dramatically changed. Nowadays, the offshore industry is widely recognized as a key component for the future generation mix, proudly showing a flourishing market with a new range of turbines, well-built supply chain and continuously optimized costs. As a result of this recent market progress, other countries beyond Europe have focused on offshore solutions too, arranging plans for gross spread of this industry mainly in North America and Asia. As an example, more than 1GW of offshore was installed in China during 2017 and determined programs for offshore expansion, have recently been set in the US for the next decade. The Indian government has recognized that both the demand for electricity and the need to decarbonize is going to rise steadily and so has defined forceful objectives for 2022. Thus, offshore wind is set to become a relevant sector in the medium and longer-term plans. The areas of Gujarat and Tamil Nadu have already been identified, as places where strong and steady resources of clean energy, can be

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The role foundations play in the deployment of larger, heavier, more powerful wind turbines, in deeper waters and further from shore, has perhaps not received the attention it deserves. But it is crucial in driving down offshore wind’s levelised cost of energy to the point where it can compete with fossil fuel and nuclear sources. Technology and costs compared Fixed foundations, whether monopile, jacket or gravity base designs, now support towers and turbines that weigh well over 1,000 tonnes and have a tip height of more than 200 metres. The foundations need to be able to do this, in high winds and heavy seas, for at least the 25 years of the turbine’s anticipated operating life. Monitoring the structural integrity of the foundations, especially in the critical areas of greatest strain – just above and below the seabed – requires high expertise and state of the art test and measurement technology. This is a field where industry development has outstripped design standards. There is no easy guide for offshore developers. In this report, technology leader HBM Test and Measurement compares resistive and fiber-optical gauge systems for offshore wind foundations. To help design verification, or as a system to provide long-term assurance that the foundations

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PES caught up with Hans Gatzemeier, Managing Director, ELA Container Offshore GmbH, to ask him about their temporary accommodation solutions. These are availbale for sale or rent and standardised modules can be customised to fit various requirements. Crew comfort and safety are paramount. PES: Welcome back to PES Wind magazine, it’s great to talk with you again. For the benefit of our new readers would you like to begin by explaining a little about the background of the ELA Container Offshore GmbH and the importance of the offshore wind industry to you? Hans Gatzemeier: Thank you for the warm welcome! In a nutshell: ELA Container Offshore GmbH is a supplier of temporary accommodation solutions for the offshore market. The company was founded in 2014 and is based in Lower Saxony, Germany and we are a young and fast growing company. Since our last meeting, our team has grown to 23 highly motivated professionals and at the end of last year we moved into our brand new production facilities in Haren, Ems. Our core business is supplying temporary offshore accommodation solutions and we are enjoying a high demand from all offshore markets. The offshore wind industry has developed into a very successful segment for

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As the wind industry continues to grow and mature, O&M models for the servicing of wind farms are becoming more diversified. With increasing competition and margins under pressure, it’s crucial to adopt an O&M model that is cost-efficient while securing high availability. Over the last decade, while the wind industry was still maturing, most development companies had a clear focus on portfolio growth. This resulted in a quick build-up of competencies around project development and construction, with less focus on O&M strategies. But as more owners in the industry became industrial – overseeing GWs rather than MWs of installed capacity – the need for more strategic asset management became apparent. Like other industry players with roots in the conventional energy sector, EC&R adopted the proven approach that has been applied to hydro, coal, gas and nuclear assets for over 100 years: performance optimization during operational lifetime, and lifetime extension to maximise returns on both past and future investments. Choosing the right O&M model Today, there are three main wind O&M service models available in the market: OEM services, Independent Service Provider services and self-perform/in-house O&M: Buying a wind turbine from a manufacturer typically comes with an OEM (full) service contract. Such a contract is

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Lindø Industrial Park saves time and manpower by replacing heavy polyester slings with lightweight Dynamica SafeLift slings manufactured in Dyneema®. The industrial park on Funen has a great experience with the handling and shipping of large components for the offshore and heavy industry. The industrial zone in Odense is, amongst other things, a collection point and a storage depot for jackets for offshore wind turbine foundations. Jackets are 63m tall steel structures with a weight of up to 665t per piece. This figure corresponds to the weight of 27 fully loaded lorries! A gantry crane with a capacity of 1,000 t is used several times, both to gather the jackets and then to move them around for storage or shipping. The process involves lifting of so-called 3D structures, which have a height of 55m and a weight of approx. 500t per piece, where rigging needs to be done at a height of some 50 or 60m. A lifting sling is lowered down along the foot of a jacket, pulled underneath two stiffs, and then guided back up to the beam. Lindø Industrial Park has used polyester slings for this type of lifting until very recently. In this case a standard polyester sling had

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Deutsche Windtechnik operates a unique Training Center with actual turbines from various manufacturers. In a time in which technology, systems, processes and learning methods are constantly changing, it is important to train your company staff using intelligent, agile methods. The much-discussed shortage of skilled workers also highlights the need for targeted management of competencies within a company. Ensuring the quality of our worldwide service is not the only purpose of the company’s new competence centre, which covers technology from a range of different manufacturers. By opening up its training courses to operators and operations managers, we are promoting technical transparency in the market as a whole, and this will lead to an increase in fair competition. It is no secret: well-trained specialists, unique skills and professional control of the quality of products and services are essential factors for a successful company. Training and further education for employees, special training courses and an overall willingness to encourage and foster personal development are part of any holistic corporate culture. Deutsche Windtechnik, which is Europe’s largest independent provider of maintenance for wind turbines and employs more than 1,000 people, has set new standards for the dissemination of specialist knowledge during recent months by establishing what

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More and more with the growth of wind farms in the North Sea, depots in convenient locations that offer fast and efficient services are imperative to ensure continuous power generation in the face of an emergency or breakdown. PES wanted to find out more about Cargostore, who as the world’s largest operator of DNV 2.7-1 certified Reefer Cargo Carrying Units (CCUs), are providing such a service. Utilizing DHSS quay side yard space at Eemshaven, Cargostore Worldwide Trading Ltd’s dedicated CCU depot provides round the clock service to wind farm projects. Holding a full range of DNV 2.7-1 certified equipment, wind farm project managers can now access reefers, hazardous goods containers, rigging lofts, storage units, workshops and toolboxes, 365 days of the year, 24/7. Having this quay side depot service means Cargostore can deliver CCUs immediately or for larger runs of stock, within less than 24 hours. This rapid response service has already been utilized by several major wind projects in the area. ‘Nearly everything I deliver in Eemshaven is on an ad-hoc, rapid response basis, saving our customers on time and transport costs. I’ll get a call for 10 and 20ft Reefers at 7pm some nights and have them delivered by 9am the

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Over the years, Jo van Montfort, from Bjond b.v.b.a. has convinced PES that the wind industry needs to look beyond standards and protocols to reduce the maintenance costs of turbines. It seems incredible that companies don’t seem to realise that they are not getting the best out of their coatings, despite what the tests say. Definition The best definition of a protective coating system is: ‘Transparent or coloured product that forms a film and protects the surface on which it is applied against influences from the environment.’ This means a barrier is created between the steel and environment in order to prevent corrosion. This barrier is applied as a liquid material that adheres to the steel substrate and forms an oxygen, chemicals (‘salts’) and water or moisture proof film. In most cases, this film is less than 1mm thick and more than 300μm. In many cases this thin film needs to protect the steel for more than 20 years, preferably maintenance free. Type of failures The main failure of a coating system when properly applied is losing its main barrier function. This means the coating cracks. When the cracks grow through the coating oxygen, water and chemicals (‘salts’) can reach the steel substrate, resulting in

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