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Tidal power

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Global leader project aims to bring about sea change in tidal power costs

The National reported that a GLOBAL leader in tidal technology has linked up with two Orkney-based companies in a bid to bring down the cost of renewable energy production.

Dutch company Tocardo Tidal Power has burst on to the tidal scene in the UK with the InToTidal project kick-off and the arrival of Tocardo’s system in Orkney last week in preparation for its deployment at the European Marine Energy Centre’s (EMEC’s) grid-connected tidal test site. It is the start of Tocardo’s planned 20-year commercial demonstration project at EMEC’s Fall of Warness site.

With the installation of the system, Tocardo is getting ready for a large scale roll-out of its generic solution for tidal energy production.

Led by Tocardo, the project brings together Orkney-based companies EMEC and Leask Marine, and French research institute IFREMER. Tocardo has already been working with international shipyard Damen, as well as Leask Marine, Bryan J Rendall Electrical and Aquatera in Orkney for the system deployment at EMEC’s tidal site.

Mr Hans van Breugel, CEO of Tocardo Tidal Power, said: “Our work at EMEC is an important step in de-risking and improving Tocardo’s offshore tidal power technology. Tocardo’s benchmark is to produce energy at the cost of offshore wind in the near future. To be able to achieve this, the tidal energy sector needs to be able to increase the installed volume of equipment.

Mr Breugel said that “In that respect it is important to see a support scheme suitable for the marine energy sector, to encourage technology companies like Tocardo to build out on an industrial scale in the UK. A revenue-based support mechanism, decreasing over time, has proved to be best in creating a new industry through market incentives, as learned from, as an example, the industry growth of the Danish wind energy sector.”

He said that “Tocardo is ready to become one of the larger inward investment companies into the marine energy sector, with a strong operational and production base in Scotland and Wales. The UK is extremely well positioned as a maritime nation to create new jobs from the growing tidal energy industry.”

Source : The National
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MeyGen's AR1500 Turbine generating to the grid in Scotland

Atlantis, a global leader in the tidal power sector, is delighted to confirm, following Monday’s announcement of the deployment of the first AR1500 tidal stream turbine at the MeyGen project site in the Pentland Firth, Scotland, that the 1.5 megawatt turbine has already successfully exported power to the grid and has operated at full power.

Source : Strategic Research Institute
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MeyGen Phase 1A approaches 400MWh of generation

Atlantis, a global leader in the tidal power sector, confirms that having entered operation in November 2016 and been awarded full Ofgem accreditation as a 5 ROC project in February 2017, the MeyGen array continues to deliver clean, sustainable and predictable electricity to the National Grid.

Source : Strategic Research Institute
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The world’s most powerful tidal turbine hits peak power in Orkney

The world’s most powerful tidal turbine, developed and manufactured by Scottish engineering company Scotrenewables Tidal Power Limited, has reached full rated power at the European Marine Energy Centre, Orkney.

Source : Strategic Research Institute
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Schotland zet groot in op stroom uit eb en vloed

Schotland voert een groot project uit waarin bedrijven commercieel elektriciteit gaan winnen uit en eb en vloed. Hoe werkt dat en loont het? Vijf vragen over het project.

Stroom uit eb en vloed?

Zeker, voor de Schotse kust ligt elektriciteit bijna voor het oprapen. Zeewater stroomt met zo'n 5 meter per seconde door de baaien, waardoor turbines in de waterstroom stevig kunnen ronddraaien. De eerste turbines draaien al, en de bedoeling is dat deze elektriciteitsopwekking veel groter gaat worden. Sinds maandag kunnen bedrijven bieden op een project dat uiteindelijk net zo veel energie moet opwekken als een windpark op zee. In totaal 398 megawatt moet er komen, waarmee dit het eerste grote commerciele project is voor getijdenstroom.

Waarom is getijdenstroom aantrekkelijk?

Omdat bewegend water een veel betere bron is dan wind. Zo laten getijden zich prima voorspellen in plaats van de grilligheid van het weer. Daarnaast is bewegend water veel krachtiger. Wie in een zomerbries staat van 15 kilometer per uur (windkracht 3) voelt weinig, maar wie door een rivier loopt die 15 kilometer per uur stroomt, wordt zo omver geworpen.

Het soortelijk gewicht van water is 800 keer groter dan lucht, en dat betekent dat stromend water bij dezelfde snelheid 800 keer meer energie bevat dan wind. Bovendien ziet niemand de turbines, in tegenstelling tot windparken aan de horizon.

Loont getijdenstroom financieel?

Nog niet. 'We staan nu met getijdenstroom waar vijftien jaar geleden windenergie stond', zegt Antonio Jarquin-Laguna, onderzoeker aan de TUDelft. Ook toen was windenergie duur, maar die prijzen zijn daarna stevig gedaald. Het probleem bij getijdenstroom is volgens Jarquin-Laguna niet de prijs van de turbines, maar de onzekerheid. De turbines draaien in zout zeewater, zitten daarmee in een agressief milieu en zijn slecht bereikbaar voor onderhoud. 'Investeerders prijzen in dat turbines kapot gaan. Maar als nu blijkt dat ze wel goed werken, moet dat veel meer vertrouwen geven aan investeerders en kunnen de kosten dalen.' In het Schotse project moet stroom £100 per megawatt kosten, dat komt in de buurt van de prijs van wind op zee maar is nog steeds bijna drie keer zoveel als de marktprijs.

Kan dit ook in Nederland

Ja, maar de potentie is vele malen kleiner. In de Westerschelde zou het kunnen, daar draaide een tijdje een proefproject. Maar hier bleek de stroom omgerekend € 1560 per mWh te kosten. Het probleem is dat voor getijdenstroom een baai nodig is die krachtig vol- en leegstroomt en daardoor een groot verval geeft. Zoals bijvoorbeeld bij het franse Mont Saint-Michel, met een verval tot 14 meter. Dit soort gunstige plekken heeft Nederland niet.

Kan getijdenstroom in Europa windparken vervangen?

Het zal eerder een aanvulling zijn. Zo verwacht de Britse overheid dat getijdestroom in een vijfde van nationale behoefte kan voorzien. De vraag is alleen wanneer. Bloomberg New Energy Finance verwacht dat er over drie jaar 87 megawatts aan getijdenstroom is geïnstalleerd, maar dat is nog steeds een fractie tegenover duizenden megawatt aan windenergie. Het zal er vooral van afhangen hoe snel de kosten dalen, aldus de onderzoekers. Als dit rap gaat gloren er grote kansen - voor Schotland.

fd.nl/ondernemen/1196385/schotland-ze...

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Bangor University, Nortek and Partrac team up for cheaper energy

Oceanographers at Bangor University’s School of Ocean Sciences are launching a major project to study tidal turbulence at the Menai Strait in Wales. Just how can this project help reduce development costs, leading to cheaper energy from the tides?

Source : Strategic Research Institute
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Wave and Tidal win for 10MW renewable ocean current technology

Doosan Babcock announced that the Asset Management team has won a second contract in the Wave and Tidal Energy sector in as many months.

Source : Strategic Research Institute
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The Project

The Project is not a barrage, it is an “Electric Bridge”. The scheme will not impound water like a barrage, the water will be free to flow on both flood and ebb tides. An early conceptual design proposes that the Electric Bridge is sited at the estuary to maximize the generation potential and will include a foot-way and cycle track, linking Fleetwood and Knott End-on-Sea and access for emergency vehicles.

The Electric Bridge will be constructed using Venturi Enhanced Turbine Technology (VETT), from VerdErg Renewable Energy Limited, that utilizes 80% of the tidal flow through a Venturi with no moving parts to amplify the pressure for a turbine in the remaining 20% of the flow.

En meer, zie link:

www.wyretidalenergy.com/the-project/
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Bankroet dreigt voor Nederlandse ontwikkelaar van getijdenturbines

Gepubliceerd: 03 januari 2018 15:36 Laatste update: 03 januari 2018 15:35

Tocardo, een Nederlandse ontwikkelaar van turbines voor getijdenenergie, heeft uitstel van betaling gekregen.

Dit meldt RTL Z woensdag. De surseance volgt op het stuklopen van een aandelenverkoop aan het Canadese energieconcern Tribute Resources.

Tocardo kwam in het nieuws door de ontwikkeling van een turbine die groene energie kon opwekken met behulp van de getijden. Prototypes werden getest bij de Afsluitdijk en in 2015 werden vijf turbines geplaatst bij de Oosterscheldekering.

Maar de turbines zijn voorlopig nog geen concurrerende technologie op de Nederlandse energiemarkt. De kostprijs van de opgewekte stroom was hoger dan de opbrengst waardoor er subsidie nodig was.

Offshoreconcern Huisman, sinds 2012 aandeelhouder, verkocht in 2016 het aandelenbelang door de hoge kosten van de turbines. Tribute Resources nam een belang van 46 procent over en zou ook de resterende aandelen kopen, maar woensdag bleek dat beide bedrijven het niet eens konden worden over de voorwaarden.

Door: NU.nl
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Estimated Potential of Tidal Energy in India is about 8000MW – Mr RK Singh

Minister of State for Power and New & Renewable Energy, Mr Raj Kumar Singh, in a written reply to a question in Rajya Sabha informed that as per a study conducted by the Indian Institute of Technology, Chennai, in association with CRISIL (Credit Rating Information Services of India Limited) Risk and Infrastructure Solutions Limited, there is an estimated potential of about 8000 MW of tidal energy, with 7000 MW in the Gulf of Kambhat, 1200 MW in the Gulf of Kutch in Gujarat, and about 100 MW in the Gangetic delta in Sunderbans in West Bengal.

The report is titled “Study on Tidal & Waves Energy in India: Survey on the Potential & Proposition of a Roadmap” and is available at the website www.ireda.gov.in, the Minister added.

Mr Singh also informed that tidal energy cannot be presently harnessed on commercial basis due to high capital cost ranging from Rs. 30 crores to 60 crores per MW.

Source : Strategic Research Institute
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Marine Power Systems launches prototype wave device WaveSub in Wales

UK marine technology development company Marine Power Systems has successfully launched its wave energy device the WaveSub onto open water, marking the start of a new phase of sea-based testing for the device. The 1:4 scale prototype of the WaveSub wave energy converter was launched in Milford Haven and has already completed the first steps of an initial phase of testing by successfully demonstrating its ability to be easily towed and safely accessed whilst in its surface configuration.

Developed with support from organisations including the Welsh Government and European Regional Development Fund, the WaveSub is a wave energy device designed to generate electricity by harnessing energy from the continual orbital motion of waves under the surface of the sea. This move into initial sea-based tests follows on from an unveiling of the WaveSub at Pembroke Dock in late 2017.

Prior to its launch, the WaveSub underwent a full suite of land-based commissioning tests which form a structured programme of verification to confirm the WaveSub’s suitability to progress to intensive testing at sea. Commenting on the initial results, Dr Graham Foster, Chief Technical Officer at MPS said: “The positive results from initial sea-based tests for the WaveSub are hugely encouraging for the MPS team. We hope to move through the remainder of this phase of testing with similar success before moving into tests which can confirm the operational ability and energy generational capacity of the WaveSub device in open sea conditions.”

Following the completion of tests in Milford Haven, the WaveSub will be towed to the award-winning marine test site FaBTest in Cornwall, England. Here, MPS will demonstrate the WaveSub’s power-generation capacity across a broad range of sea states, the rapid installation methodology, its ease of maintenance and its survivability through the harshest of sea conditions. Results will enable MPS to move ahead with its long-term plan to build a full-scale, grid connected WaveSub by 2020.

Said Marine Power Systems CEO Dr Gareth Stockman that “Embarking on this new, sea-based phase of testing for the WaveSub is an important step for MPS. We are convinced of the huge potential that ocean energy offers the UK and the rest of the world and remain focused on our long term ambition to achieve this through the commercialisation of full-scale, grid connected WaveSub devices.”

Source : Strategic Research Institute
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SINN Power launches wave energy project off Cape Verde

With the signed agreement between SINN Power and Fazenda de Camarao, SINN Power is all set to begin the company’s first commercial wave energy project on Cape Verde. For hundreds of years, huge waves have crashed onto the long, rocky shores of Sao Vicente. Still, up to now, electricity for the African island is generated by polluting diesel generators instead of using the immense energy contained in the ocean’s waves.

SINN Power has partnered with the local association Fazenda de Camarao (a company for aquaculture) to begin a commercial demonstration project for wave energy on São Vicente. Within this project, a SINN Power wave energy converter will be installed to supply an organic shrimp farm with 100% renewable energy.

As agreed in the contract between SINN Power and Fazenda de Camarao, the project launches shortly with a detailed feasibility study.

Mr Philipp Sinn CEO of SINN Power said that “SINN Power is looking forward to realize the first steps of this feasibility study, as it could open a new chapter of renewable energy supply. If 10% of the energy needs of Cape Verde are covered by our innovative technology, we could reduce the yearly carbon footprint by 37,000 tonnes.”

Over the following months, SINN Power will begin with the measuring of the local wave data. An exact wave profile will be generated and several other analyses will be carried out.

As soon as the production of the sea food is fully established, SINN Power will start to protocol and measure the exact energy needs of the shrimp farm to tailor a perfectly customized off-grid system.

The following step will be to install the SINN Power wave technology. To do so, the engineers will design a custom-made SINN Power wave energy converter array to match the individual energy demand.

Over the next years, SINN Power will design an energy system based on its innovative wave energy technology to supply the sustainable shrimp farm with energy. The SINN Power wave energy converter generates electricity using the power of waves. Backed up by a solar power plant, Fazenda de Camarão will produce organic sea food with 100% renewable energy.

Honorary Consul of the Federal Republic of Germany and general manager of Fazenda de Camarão, Carlos Ferreira Santos, defines the project as pioneering: “By teaming up with SINN Power, our farm will deliver a product with very low carbon footprint, as part of our holistic approach to sustainability. At the end, we want to become a global role model for quality, sustainability and value.”

The first progress on Cape Verde became visible last year. While the engineers in Germany worked on finalizing the next generation of the patented SINN Power technology, the partners on São Vicente completed the aquaculture structure. The production of the shrimp will be launched promptly.

SINN Power’s project manager Fabian Brandl is enthusiastic that “With the island São Vicente and our local partners we have found the ideal conditions for our first commercial wave energy project. Establishing a flagship project for sustainability will be an important milestone for our technology and will have a positive impact on all of Cabo Verde.”

Source : Strategic Research Institute
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EMEC FORESEA tidal energy tripod decommissioning study

The European Marine Energy Centre Ltd has contracted Orkney-based marine operations provider, Leask Marine, to remove a tripod foundation from EMEC’s Fall of Warness tidal energy test site. The operations will feed into a collaborative FORESEA-funded project called FoDTEC (Forensic Decommissioning for Tidal Energy Converters), involving Blackfish Engineering Design Ltd, the International Centre for Island Technology, Rovco Ltd, and Brunel Experimental Techniques Centre, Brunel Centre for Advanced Solidification Technology and Brunel Design.

The FORESEA support package will focus on conducting forensic analysis to obtain a comprehensive understanding of the end-of-life condition of the tripod, which was first installed in 2009, and ascertain the long-term effect of deploying components and systems in the sea.

Forensic examination techniques will focus on biofouling and metallurgic analysis as well as collation of a detailed photographic record of the decommissioning activity for future reference.

A lessons-learned report offering best-practices for device and infrastructure design, deployment, operation, maintenance, and decommissioning will be published for the benefit of the sector, enabling developers to minimise decommissioning costs and de-risk future projects.

Decommissioning is a critical part of the lifecycle of any ocean energy project but is not yet well explored as relatively few technologies have progressed to the decommissioning stage following long-term deployment, and limited resources force focus on the development and demonstration phases of prototype projects.

Mr Nic Wallet, FORESEA Programme Manager, EMEC said that “The FORESEA programme was developed to bring offshore renewable energy technologies closer to market by providing free access to North-West Europe’s world-leading network of test centres. Whilst this has primarily focused on the demonstration of wave and tidal energy converters in real-sea conditions, we’re excited to see this extend to include another vital aspect of the ocean energy technology lifecycle: decommissioning.

“The tripod has remained in situ at the Fall of Warness to give the potential for it to be usefully repurposed, however so far EMEC’s clients have preferred to have clear access to test berths. Therefore we made the decision to remove the tripod, taking the opportunity to address the lack of decommissioning that has taken place in the industry to give clearer insight into the latter stages of a technology’s lifecycle. The project was formed to conduct forensic analysis and share the learning with developers and other test centres to ensure that the works are of maximum use to the industry. Through sharing lessons learned and implementing them into future device designs and operations, we expect to positively impact the LCOE for ocean energy.”

Mr Tim Warren, Engineering Director, Blackfish, said that “This project offers a fantastic opportunity to learn about the decommissioning process, as well as to provide valuable learning to developers in the field of long term biofouling and corrosion effects. Until now, there have been few opportunities to study tidal stream sub-sea infrastructure that has been in place for nearly 10 years. Through collaboration with ICIT, Brunel University and Rovco, the project partners combine specialist biofouling and metallurgical forensic examination techniques as well as industry expertise to maximise the benefits that we can bring to the wider offshore renewables industry. We are also developing new tools and techniques that can be used in this field to aid learning and information capture for the benefit of device developers.”

Mr Douglas Leask, Managing Director, Leask Marine, said that “We are delighted to have been appointed through tender by EMEC as the marine contractor for this important decommissioning project. This will bring together the experience of the local supply chain to facilitate the removal of the tripod foundation that is currently installed on Berth 2 of EMEC’s grid connected tidal test site, while providing a decommissioning case study and recommendations for further cost reductions and de-risking. Providing a low-cost option for decommissioning has come about through using the same methodology as other successful subsea structure decommissioning projects that Leask Marine has performed around the UK for developers.”

Leask Marine expect to complete the site removal works during the summer of 2018.

Source : Strategic Research Institute
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Crown Estate Scotland extends Nova’s Shetland tidal array seabed lease

Crown Estate Scotland has granted an extension to Nova’s existing seabed lease at Bluemull Sound in Shetland, increasing the capacity of the site lease from 0.5MW to 2MW. The extension will also see the current lease period extend until 2041. The lease extension builds on the successful operation of Nova’s Bluemull Sound turbines over the last two years. In 2016, the Shetland Tidal Array became the world’s first offshore tidal energy array, delivered with over 80% supply chain content from Scotland.

The extension of the Bluemull Sound Lease provides opportunities for further deployment of turbines as part of a larger array and creates the prospect of a longer-term operation in Shetland. The next phase involves the installation of an additional three turbines by 2020, under the EnFAIT project: a flagship European tidal energy technology initiative led by Nova, in a consortium of nine leading industrial, academic and research organisations from across Europe.

Mr Patrick Ross-Smith, Shetland Manager for Nova Innovation, said that “We see this as a big vote of confidence from Crown Estate Scotland for tidal energy. The experience and data we have developed from deploying and operating the turbines in the world’s first offshore tidal energy array are helping us to optimise our technology and processes. This lease extension paves the way for expanding the array, using the next generation of Nova turbines: further driving down the costs of this clean and predictable source of renewable energy.”

Mr Mark McKean, Development Manager for Crown Estate Scotland, commented that “We’ve watched the development of Nova Innovation’s Bluemull Sound site with interest and are really pleased to be able to support further growth of this project with this lease extension. With their ongoing work to further enhance the technology to be utilised at the Shetland site, Nova is demonstrating that tidal energy projects are truly coming of age. During the last 12 months we have witnessed a significant upturn in tidal energy deployments within Scottish waters and Nova’s existing operations at Bluemull Sound have added to that. We look forward to seeing further progress at this site and benefits for the local supply chain in the coming years.”

Source : Strategic Research Institute
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Ocean DEMO awards 12.8 million euros to demonstrate ocean energy farms

Ocean DEMO will provide funding to developers of marine renewable technologies to test their products or services in real sea environments, specifically targeting multi-machine ocean energy installations. This will allow developers to move closer to market by demonstrating their technologies at full commercial scale. Ocean DEMO will release a first call for applications this year and devices will be installed from 2020 to 2022.

The transition from single machine to pilot farm scale is critical for the future of the ocean energy sector. Scaling up to multi-device farms will improve the competitiveness of the technology by bringing down costs across the supply chain. This transition comes with higher capital requirements and investors require a proven business case before they get further involved.

Ocean DEMO will ease the transition towards pilot farms by providing free access to Europe’s world leading network of open sea test centres:

- EMEC - European Marine Energy Centre, UK – Project leader
- DMEC - Dutch Marine Energy Centre, Netherlands
- SEM REV, France
- SmartBay Ireland

Ocean DEMO follows on from the highly successful FORESEA project, which provides free access to open sea test centres for single machine testing. FORESEA has helped prove the tremendous potential of ocean energy, with 19 technologies deployed and more to come this year. Examples like Orbital Marine Power, who generated over 3 GWh of electricity in a year, proved that the technology works and can be part of a renewable energy mix in Europe.

Industry group Ocean Energy Europe will channel the project’s achievements and learnings to its international network of ocean energy professionals, ensuring broad dissemination across the sector.

Mr Oliver Wragg, Commercial Director at EMEC, said that “We’re delighted to be able to continue the work we started with FORESEA. We were able to demonstrate a wide range of technologies throughout the ocean energy supply chain thanks to Interreg’s support and the efforts of all the project partners. With Ocean DEMO, we will be able to scale up technologies to pilot farm scale. This will reduce technical risks, minimise environmental impacts and improve the economic competitiveness of ocean energy production. We’re looking forward to collaborating with ocean energy innovators across Europe and help them get machines in the water.”

Mr Rémi Gruet, CEO of Ocean Energy Europe, said that “We are very happy about Interreg’s steady support for ocean energy development in Europe. The ocean energy industry can provide jobs to 400,000 Europeans as well as 10% of Europe’s electricity by 2050. Ocean DEMO will be another significant step towards those objectives. Multi-device demonstration will strengthen the technology’s business case and attract investors, which will in turn allow the industry to scale up and bring down costs. A revenue support system, feed-in tariff, Contract for Difference or similar, is the only thing we’re missing to unlock the full potential of ocean energy in Europe. It is now up to Member States to create the right conditions for this industry to thrive.”

Source : Strategic Research Institute
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IIT-Roorkee testing floating device to produce electricity from river surface

Economic Times reported that Scientists at IIT-Roorkee are testing a floating device that can generate electricity from flowing surface water of rivers and streams, paving the way for an alternative source of renewable energy. Traditional hydropower plants require the construction of large-scale dams, which have significant ecological and environmental consequences. To counter this, a team at Indian Institute of Technology Roorkee is testing a prototype that harnesses energy from flowing surface water.

Mr RP Saini, the principle investigator of the project said that "In traditional dams, water falling from a height is used to turn turbines.” He added that "We are instead using the velocity of the flowing river to turn a turbine, and generate power.”

Hydro-kinetic technology has significant advantages over other types of renewable energy, researchers said.

Mr Saini said that "Flowing water can generate hundred times more power than wind of same velocity.”

Mr Sunil Kumar Singal, head of the Alternate Hydro Energy Centre at IIT Roorkee said that "The interest of government for last 3-4 years is more on solar energy, because it is a modular system that can installed in four months and sunlight is available everywhere.” He added that "But, the problem with solar energy at present is that on cloudy days and during the nights, we would need alternate source as currently energy storage systems are not efficient enough.”

The prototype, developed in collaboration with Delhi-based Maclec Technical Project Laboratory, has been installed in the Upper Ganga Canal in Roorkee, Uttarakhand for testing.

Source : Economic Times
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Zeeland Tidal Power to power 100,000 households

The “Zeeland Tidal Power” partnership consists of the companies Hillebrand, Istimewa, DELTA Energy, PZEM, Zeeuwind and Tocardo. This first tidal power plant in the Eastern Scheldt Barrier, part of the Deltaworks, is the largest tidal energy project in the Netherlands as well as the world’s largest commercial tidal installation of five turbines in an array. This project marked a very important step in the development of tidal energy, because tidal energy could grow into a significant Dutch export product. The export expectation of tidal energy is more than 200 Gigawatt.

In the past years, extensive monitoring of the first tidal power plant in the Eastern Scheldt Barrier has been carried out in the Oosterschelde, taking into account environmental effects on soil protection and the impact on the storm surge barriers as well on the environmental effects on the estuaries behind the barrier. The results of this study, performed by the Marine research institutes Deltares and Wageningen University & Research, are very promising.

Together with Rijkswaterstaat Zeeland Tidal Power is investigating the full rollout of the 100 MW plan, always and first taking into account the primary task of the Deltaworks, as water defense for the Netherlands. The Delta Works were built by Rijkswaterstaat to protect the country against flooding from the North Sea.

The Eastern Scheldt Barrier is the largest and best known of the Delta Works. The 9 kilometre long structure seals off the Oosterschelde if there is a threat of flooding. The Eastern Scheldt Barrier is a unique project. At the time, it was the largest ever structure to be built in terms of its scale and dimensions. And it is still unequaled. The barrier is regarded worldwide as a landmark in hydraulic engineering.

Tidal energy is a form of sustainable energy with an enormous worldwide potential. The major benefits of tidal energy are the limited impact on the environment, the invisibility of the turbines, the enormous available capacity and the exact predictability of generated power.

Source : Strategic Research Institute
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Eni, CDP, Fincantieri and Terna to develop wave power plants on an industrial scale

The Chief Executive Officers of Cassa depositi e prestiti, Fabrizio Palermo, of Fincantieri, Giuseppe Bono, of Terna, Luigi Ferraris, and of Eni, Claudio Descalzi, signed a non-binding agreement today at the Eni headquarters in the EUR district of Rome to develop and build wave power stations on an industrial scale. The agreement seeks to combine the expertise of the collective companies to transform the Inertial Sea Wave Energy Converter pilot project into a project on an industrial scale for immediate application and use. ISWEC is the innovative system that converts energy generated by waves into electricity. Eni installed the project at its Ravenna offshore site.

Under the terms of the agreement, Eni will share its findings from the ISWEC plant pilot project with the joint working group. The ISWEC built in collaboration with the Politecnico di Torino and the Wave for Energy spin-off, will share its technological, industrial and commercial expertise with the group, in addition to sharing information on the logistical and technological elements used at its offshore plant.

Claudio Descalzi, CEO of Eni, said “Today's agreement is an important step forward towards building a new production system for renewable energy generated by wave power. This deal is part of our strategic decarbonization plan and stems from Eni's focus on research, development and the application of new technologies aimed not only at making traditional operating processes more efficient, but also at driving us to create new business segments in the energy sector. Collaborating with three exceptional Italian companies like CDP, Terna and Fincantieri will enable us to pool distinct skills that each company already possesses and help accelerate the development process of this technology.

Source : Strategic Research Institute
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Nederland moet nu inzetten op energie uit water

Opinie | Piet Ackermans is voorzitter van de branchevereniging Energie uit Water en Britta Schaffmeister is directeur van de Dutch Marine Energy Centre

De maatregelen die het kabinet eind vorige week presenteerde om in 2050 een CO2-vrij elektriciteitssysteem te realiseren, zetten terecht volop in op de hernieuwbare bronnen energie uit wind (windmolens op zee en op land) en energie uit zon (zonnepanelen). Helaas werd bij de presentatie door het kabinet de hernieuwbare bron energie uit water vergeten.

Geopende schuiven laten water door de stormvloedkering in de Oosterschelde.Foto: Erik van 't Woud / Hollandse Hoogte

Dat is een gemiste kans. Want niet alleen is Nederland waterland bij uitstek en hebben we alle vormen van duurzame energie hard nodig, energie uit water kan ook uitgroeien tot een geweldig exportproduct.

Iedereen is het er inmiddels wel over eens: windenergie en zonne-energie hebben de toekomst. Maar rond 1985, bij de bouw van de eerste windmolens, konden we dit nog niet voorzien. Zonne-energie en windenergie hebben zich de afgelopen jaren stormachtig ontwikkeld. Veel sneller dan gedacht, zullen zij goedkoper zijn dan fossiele brandstoffen. Duurzame energieopwekking wordt namelijk door schaalvergroting en technische ontwikkelingen steeds goedkoper, waardoor er minder subsidie nodig zal zijn. Naar verwachting zal in 2040 34% van de energiewinning uit zon en wind komen. Dat is nu nog 5%.‘De getijdenturbines in de Oosterschelde stormvloedkering zijn voorbeelden van energie uit water’

De focus op zonne-energie en windenergie in combinatie met de relatief hoge kosten van energiewinning uit water, hebben ervoor gezorgd dat het stimuleren van deze laatstgenoemde duurzame bron van de overheidsradar is geraakt. De ontwikkeling van energie uit water zit in Nederland nog steeds in de startfase, vergelijkbaar met die van windenergie dertig jaar geleden. Maar meer investeren in energie uit water kan een enorme impuls geven aan onze kenniseconomie en werkgelegenheid. Projecten in het buitenland laten zien dat energie uit water nu al concurrerend is. Dat komt door de hoge voorspelbaarheid en de mogelijkheid van slimme integratie van energiewinning uit water met bijvoorbeeld bruggen en dammen.

De potentie van energie uit water laat zich in Nederland ook al volop zien. Een goed voorbeeld zijn de getijdenturbines van Tocardo in de Oosterschelde stormvloedkering, die dagelijks energie opwekken. De werking van de getijdenturbines in de afgelopen jaren heeft aangetoond dat er geen negatieve effecten op de veiligheid of op de omgeving zijn. Op de Afsluitdijk wordt elektriciteit opgewekt uit het verschil tussen zoet- en zoutgehalte tussen het IJsselmeer en de Waddenzee door het bedrijf REDstack. Bij de Grevelingendam wordt gebouwd aan een Tidal Technology Centre.

Opschaling van deze praktijkcases, aangevuld met andere initiatieven, kunnen tegen 2030 een vermogen opwekken van circa 200 tot 300 Megawatt. Dat is natuurlijk nog bescheiden. Maar rond 1985, bij de bouw van de eerste windmolens, konden we evenmin vermoeden dat deze ontwikkeling een snelle vlucht zou nemen.
De ontwikkeling van de ‘Tidal Bridge’, een uniek concept van een brug waar getijdenenergie wordt opgewekt, is een uitstekend voorbeeld van de potentie van energie uit water als exportproduct. Het concept is in samenwerking met Nederlandse engineers en offshore-bedrijven ontwikkeld. De showcase bij de Oosterscheldekering was bepalend voor de Indonesische overheid om een haalbaarheidsstudie naar de bouw van een dergelijke brug in de provincie Nusa Tenggara Timur (Larantuka) in Indonesië te initiëren.

Het is belangrijk dat de overheid werkende praktijkdemonstraties en showcases stimuleert en projecten van energie uit water binnen de bestaande regelingen financieel beter gaat ondersteunen. Zonder deze showcases en opschaling kan er geen portfolio worden opgebouwd.

De aanleg van windparken langs de kust in Nederland (bijv. Borssele V) en de voorziene hernieuwing van stuwen (bijvoorbeeld in de Maas), dijken en dammen bieden hiervoor kansen. De nieuwe doorlaat in de Brouwersdam voor herstel van waterkwaliteit, biedt een uitgelezen mogelijkheid voor de integratie van een getijdecentrale. Een geweldige kans voor innovatieve verduurzaming die eerder, bij de renovatie van de Afsluitdijk, niet is benut.

Daarnaast moet energie uit water bij de overheid meer prioriteit krijgen om in te zetten als exportproduct. Te vaak worden projecten voor het buitenland nu nog afgewezen.

Nu we de maatregelen voor het Klimaatakkoord gaan uitrollen, moeten we vooral energie uit water niet vergeten. Zodat we in 2050 net zo versteld staan over de waarde van deze duurzame energiebron als we nu doen over wind en zonne-energie.
Piet Ackermans is voorzitter van de branchevereniging Energie uit Water (EWA) en Britta Schaffmeister is directeur van de Dutch Marine Energy Centre (DMEC).

fd.nl/opinie/1307042/nederland-moet-n...
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Bouw twee lange energiedammen in zee

Waarom de Noordzee vol bouwen met duizenden windmolens als je op een fractie van de ruimte evenveel of nog meer 100% schone elektriciteit kunt opwekken met constant vermogen? FD-redacteur Bert van Dijk pleit voor nieuw onderzoek naar de haalbaarheid van twee grote energiedammen aan de kust.

Grote problemen vragen om grootse oplossingen. Een stijgende zeespiegel, klimaatverandering en ruimtegebrek op de Noordzee. Nederland worstelt met de energietransitie, maar heeft mogelijk een onconventionele oplossing binnen handbereik: Dynamic Tidal Power (DTP).

DTP werkt door gebruik van tot voor kort onbekend gedrag van getijgolven. Een dam die tientallen kilometers in zee steekt, eindigt met een kilometerslange dwarsdam en vormt zo een grote letter T. Aan weerszijden ontstaat onder invloed van eb en vloed een waterstandsverschil, dat duizenden turbines in het bouwwerk aandrijft.

‘In vergelijking met wind- en zonne-energie zou deze elektriciteitsproductie een vrijwel constant vermogen bieden’
• Kees Hulsbergen

Constant vermogen

Kees Hulsbergen, oprichter van onderzoeksbureau Hulsbergen Hydraulic innovation & Design H2iD, kwam dit principe in 1996 op het spoor. Hij stelt voor om twee dammen te bouwen van 50 kilometer lang, elk met een maximumvermogen van 15 gigawatt. In tegenstelling tot het natuurlijk wispelturig gedrag van energie uit wind en zon, zal een combinatie van twee dammen een nagenoeg constant vermogen uit het getij kunnen halen. Dat komt doordat hun productiecurven onderling een faseverschil hebben dankzij het langs de kust trekken van de getijgolf.

€80 mrd

Hulsbergen schat dat zijn tweelingdammen samen goed zullen zijn voor 60 terrawattuur per jaar met volmaakt voorspelbaar en gelijkmatig gedrag. Dat is ruim de helft van het huidige elektriciteitsverbruik in Nederland.

Uit voorlopige berekeningen blijkt dat de aanleg van twee 50 kilometer lange T-dammen met turbines ongeveer €80 mrd zou gaan kosten, voor een kostprijs van nog geen 7 cent per kilowattuur. '€80 mrd klinkt veel, maar 30 gigawatt opgesteld windvermogen inclusief netaansluiting en backupvermogen gaat ook die richting op', zegt Hulsbergen.

Golfluwe lagune

Bovendien biedt een dam veel andere voordelen. Zo is het ruimtebeslag twintig keer kleiner dan wat nodig is om dezelfde elektriciteit met windmolens op de Noordzee op te wekken. Daarnaast creëren de dammen 'vanzelf' een golfluwe lagune zo groot als Noord-Holland, Zuid-Holland en Utrecht samen. Alles wat Nederland daar zou willen aanleggen, zoals ‘Schiphol-West’, Maasvlakte III, steden, vakantieoorden en natuur, wordt daardoor volgens Hulsbergen aanzienlijk goedkoper.

Nadelen heeft Hulsbergens plan ook. Het is onbewezen, want nergens in de wereld ligt zo'n grote energiedam. Beter en meer onderzoek kan daarom helpen het initiatief naar een volgende fase te helpen.

fd.nl/economie-politiek/1309629/bouw-...
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