Development of tidal stream generators

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Many tidal stream generators have been developed over the years to harness the power of tidal currents flowing around coastlines. These are also called tidal stream turbines (TST), tidal energy converters (TEC), or marine hydro-kinetic (MHK) generation. These turbines operate on a similar principle to wind turbines, but are designed to work in a fluid approximately 800 times more dense than air which is moving at a slower velocity. Note that tidal barrages or lagoons operate on a different principle, generating power by impounding the rising and falling tide.

Contents

Lots of different technology variants have been tested, and there has not been convergence on a predominant typology. Most have been horizontal-axis, like wind turbines, but with 2, 3, or more blades and either mounted on a seabed fixed foundation or on a floating platform. In addition, vertical-axis turbines and tidal kites are also being developed.

Historically, development has largely been focused around Europe, but devices have been built and tested in North America – including at the Fundy Ocean Research Centre for Energy (FORCE), Japan, and elsewhere. The European Marine Energy Centre (EMEC) was set up in Orkney in 2003, and developed a tidal test site in the Fall of Warness, to the west of the island of Eday. The site opened in 2006, and EMEC was granted a license in 2016 to test up to 10 MW of tidal stream devices, and has since hosted the testing of many of these devices. [1]

There have been various acquisitions of technology developers over the years. Many of the companies are no longer trading, or have ceased development of tidal-stream turbines. However, the first pre-commercial array demonstration projects have been operating since around 2016. Building on this, commercial arrays are expected to be operational by around 2027, at EMEC, Morlais and elsewhere.

Development timeline

Key historical milestones in the development of tidal-stream turbines are summarised below:

Key companies and turbines

Many companies have focused on the development of technology to harness tidal stream energy. A non-exhaustive list of key companies is given below.

Alstom

French manufacturer Alstom acquired Tidal Generation Ltd in 2012, but this part of the business was sold to General Electric in 2015. [10] [11]

Andritz Hydro Hammerfest

Hammerfest Strøm AS was a Norwegian developer of tidal stream turbines, based in Hammerfest. In 2010, Austrian hydropower company Andritz AG bought one third of the shares. [12] In 2012, Andritz became the majority stakeholder and rebranded the company Andritz Hydro Hammerfest. [13]

In November 2003, Hammerfest Strøm installed their HS300 turbine in Kvalsundet, Norway. [14] This 300 kW prototype was a 20 m diameter three-bladed horizontal-axis turbine. It sat on a monopile foundation in 50 m deep water. In 2003, the project was reported to have cost US$11m. [15] The HS300 turbine was connected to the grid in 2014, and operated for over 16,000 hours before it was decommissioned in 2011 and removed in 2012. [3] [16]

A more powerful 1MW device was then tested at EMEC from 2012. The HS1000 was also a 20 m diameter three-bladed horizontal-axis turbine, installed at the Fall of Warness test site in December 2011. [17] [18]

Three Andritz Hydro Hammerfest AH1000 MK1 turbines were installed as part of phase 1 of the MeyGen project in 2016. These turbines are still three-bladed, but with an 18 m diameter rotor and each rated at 1.5 MW. [19]

BigMoon Power

BigMoon Power is a Canadian company founded in 2015 developing a floating tidal stream generator. [20] The concept is designed to be simple, with an optimised waterwheel (called a Kinetic Keel) mounted between two hulls of a barge, moored by foundations build from old train cars filled with concrete. [21] [22] BigMoon plan to build and install 18 devices, each 0.5 MW, at in the Bay of Fundy at FORCE. [23] As part of the contract to test at FORCE Berth D, BigMoon has to remove before the end of 2024 the OpenHydro turbine that was abandoned there in July 2018 when that company went into administration. [24]

Flumill

Flumill AS is a Norwegian developer of an unconventional tidal stream turbine. It consists of two counter-rotating helical screws made from fiberglass, each attached to a gear-less permanent magnet generator. [25] The unit is mounted to the seabed and held up by a buoyant float/fin. [26] In 2011 Flumill was the first turbine to be tested at the EMEC Shapinsay Sound non-grid-connected test site, after tow tests in Tromøysund, Arendal, Norway. [27] [28] This device was nominally rated at 1.2 kW in the 1.5 m/s currents of Shapinsay Sound, although it could potentially generate 600 kW in faster flows. [25]

A phase 2 Flumill tidal device is currently being developed, where the screws and generators are mounted from a catamaran barge. [29]

General Electric

In 2015, GE acquired the energy assets from Alstom which included the business originally developed by Tidal Generation Ltd. [11]

In 2024, GE Vernova signed a MoU with Proteus Marine Renewables to supply electrical systems for their tidal turbines. [30]

HydroQuest

HydroQuest is a French developer of vertical-axis turbines, generating electricity from river and tidal currents, based in Grenoble. [31] The have installed several small river turbines in France and French Guiana, powering the 200 inhabitants of the Camopi village. [31] [32] [33]

A 1 MW OceanQuest tidal turbine was tested at Paimpol–Bréhat between April 2019 and December 2021. [34] [35]

In collaboration with Constructions Mécaniques de Normandie and renewable energy company Qair, Hydroquest are developing the FloWatt project. This will comprise seven Hydroquest turbine units, each rated at 2.5 MW, to be installed at Raz Blanchard, Brittany by 2027. [36] [37]

LHD New Energy Corporation

LHD New Energy Corporation have developed the Zhoushan tidal power station near Xiushan island, Daishan County, China. [38] This platform above the sea is connected to land by a bridge. In 2016, the first two turbines were installed and connected to the grid, rated at 400 kW and 600 kW. [39] In December 2018, two further turbines were added, a 300 kW horizontal-axis and a 400 kW vertical-axis, taking the total installed capacity to 1.7 MW. [40]

Magallanes Renovables

Magallanes Renovables, S.L. is a Spanish developer of floating tidal energy devices, set up in 2009. [41] They have tested a grid-connected 1.5 MW ATIR device at EMEC since 2019, [42] having previously tested a small scale device at the EMEC nursery test site in Shapinsay Sound, although this was not grid-connected. [43] Magallanes Thas been awarded Contracts for Difference (CfD) to supply subsidised electricity to the GB National Grid, at Morlais and at EMEC. [44] [45]

Marine Current Turbines

Marine Current Turbines (MCT) was a Bristol-based company that developed seabed mounted tidal-stream turbines. In June 2003, MCT installed the 300 kW Seaflow turbine in Lynmouth, Devon. [46] The larger 1.2 MW SeaGen turbine was installed in Strangford Lough in May 2008, and connected tot the Irish electricity grid in July. It was decommissioned in stages between May 2016 and July 2019, having exported 11.6 GWh of electricity. [47]

Minesto

Minesto AB is a Swedish developer of tidal kite turbines, based in Gothenburg. [48] The company tested a 500 kW Deep Green DG500 turbine in the Holyhead Deep off the coast of Anglesey, North Wales in 2018 and 2019. [49] In 2022, they installed two 100 kW Dragon 4 turbines at Vestmannasund in the Faroe Islands, [50] and are planning to install a 1.2 MW Dragon 12 turbine there in 2024. [51]

Nova Innovation

Nova Innovation Ltd is an Edinburgh-based developer of small bed-mounted tidal-stream turbines. They deployed their first 30 kW turbine in the Bluemull Sound, Shetland, [52] and have operated an array of up-to 6 of their 100 kW turbines in the Bluemull Sound since 2016. [53] [54]

Ocean Renewable Power Company

Ocean Renewable Power Company (ORPC, Inc.) is a developer of cross-flow turbines to harness river, tidal and ocean currents, based in Portland, Maine.

OpenHydro

OpenHydro Group Ltd was an Irish developer of tidal stream turbines, acquired by Naval Energies (then DCNS) in 2013, but ceased trading in 2018. OpenHydro developed a novel open-centred horizontal-axis turbine, surrounded by a ducting shroud. Various iterations of the OpenHydro turbines were tested in Scotland, France and Canada.

Orbital Marine Power

Orbital Marine Power Ltd is an Orkney-based developer of floating tidal stream turbines that have twin rotors either side of a long tubular hull. Their third-generation turbine, the 2 MW Orbital O2 has been deployed at the Fall of Warness since 2021. [55] The company was founded in 2002 as Scotrenewables Tidal Power Ltd, but rebranded in 2019. [56]

Proteus Marine Renewables

In October 2022, Proteus Marine Renewables (PMR) was formed through a management buyout of the Advanced Tidal Engineering and Services division of SIMEC Atlantis Energy, now SAE Renewables. SAE remain a minority shareholder in Proteus, and Proteus will continue to support the MeyGen tidal farm. [57] The company is based at Bath & Bristol Science Park, Bristol, England. [58]

Proteus is a majority shareholder in Normandie Hydroliennes, which is planning to deploy a 12 MW pilot tidal farm at Raz Blanchard in 2025. The NH1 project will consist of four PMR AR3000 turbines, each rated at 3 MW. [57] [59]

In August 2024, PMR started building an AR1100 turbine to be deployed in the Naru Strait to power the Gotō Islands in Japan. This is an upgrade of the AR500 turbine with added pitch and yaw mechanisms, and uprated to 1.1 MW. [60] The AR500 was previously tested in the Naru Strait from February 2021 to December 2023. [61] [62]

In November 2024, Proteus signed a MoU with SKF to supply the rotating equipment and GE Vernova to supply electrical systems for their tidal turbines. [30]

Pulse Tidal

Pulse Tidal Ltd was an English tidal stream developer, formed in 2007 after 10years of development. They developed a fully-submerged oscillating hydrofoil device, designed to work in shallow water, with horizontal blades that moved up and down in the passing current. A 100 kW, prototype was installed in 2009 at Immingham Dock, in the Humber estuary, which could generate up to 150 kW for a nearby chemicals plant. [63] [64]

The company was awarded €8m in European funding to develop the first commercial prototype, expected to be rated at 1.2 MW, and deployed at Lynmouth, Devon, where Pulse Tidal had been awarded a seabed lease from the Crown Estate. [65] The company was also developing plans for the Kylerhea Narrows between the mainland of Scotland and Skye. [66]

Pulse Tidal was liquidated in 2014. [67]

Sabella

Sabella D10 turbine Hydrolienne Sabella D10 (2).JPG
Sabella D10 turbine

Sabella SAS was a French SME based in Quimper, Brittany that has been developing tidal turbines since 2008, however the company was placed into receivership in October 2023. [68] [69] The company had developed two main variants of their technology.

The D03 was a 30 kW horizontal-axis turbine, with a six-bladed rotor 3 m in diameter, hence the name. [70] It was tested in the Odet estuary in 2008, but not grid connected. The turbine weighed 7 tonnes, and sat on a gravity base in around 25 m deep water.

The larger 1 MW D10 turbine was then developed, and tested in the Fromveur Passage, Brittany from June 2015. After hackers interrupted the communications link with the turbine, it began supplying power to the grid in Ushant on 5 November 2015. [71] [72] It was redeployed for a third test campaign in April 2022, [73] In October 2024, Inyanga Marine Energy took over the D10 turbine operation, securing permission to operate it until August 2028. [74]

SIMEC Atlantis Energy

SIMEC Atlantis Energy Ltd (now just SAE) is a renewable energy company which is developing the MeyGen tidal array in the Pentland Firth between the Scottish mainland and Orkney. Since 2017, this has operated with 4× 1.5 MW tidal turbines, making it the largest tidal-stream array worldwide. The next phases could see a further 50 MW installed by 2028. [75]

The company was founded as Atlantis Resources, and developed the 1.5 MW AR1500 turbine, a three-bladed horizontal-axis seabed mounded device, three of which are installed at MeyGen. They also built a smaller 500 kW AR500 turbine in Scotland, which was shipped to Japan and installed off Naru Island, part of the Gotō Islands. It reportedly generated 10 MWh in the first 10 days of operation in early 2021. [61]

Sustainable Marine Energy

Sustainable Marine Energy Ltd (SME) was a developer of floating tidal stream turbines, founded in 2012 but went into administration in August 2023. [76] Originally based in London, it moved to East Cowes, Isle of Wight in 2013. [77] The company then moved its operational base to Kirkwall in Orkney in 2016. [78] By 2017, the head office had been relocated to La Belle Esperance, a barge moored on The Shore, Leith, Edinburgh. [79]

Their first platform, PLAT-O, was a submerged mid-water-column device, with two 50 kW Schottel SIT turbines, mounted between three buoyant hulls. It was initially tested in The Solent, before being tested at EMEC in 2016. [80]

SME PLAT-I 6.4 horizontal, in-stream, floating tidal energy generator at Grand Passage site in Nova Scotia, Canada. 2022-07-27 PLAT-I in-stream tidal energy platform - Westport, NS CAN.jpg
SME PLAT-I 6.4 horizontal, in-stream, floating tidal energy generator at Grand Passage site in Nova Scotia, Canada.

The floating PLAT-I4.63 was developed for community-scale deployments in inshore waters. It had four 6.3 m diameter turbines mounted on a floating boat-like structure. It was first tested at the Falls of Lora, western Scotland in November 2017, [81] before being shipped to Canada and tested at Grand Passage, Nova Scotia in 2018. [82]

An upgraded PLAT-I6.4, with six 4 m diameter rotors, totaling 420 kW, was built by A.F. Theriault & Son Ltd. in Meteghan, Nova Scotia in 2021. [82] The turbine was tested at FORCE in the Grand Passage, delivering the first floating tidal power to the Canadian grid in April 2022. [83]

SME developed the Pempa’q project at FORCE which was to comprise an array of the PLAT-I turbines, with up to 9 MW installed. [84] The project received C$28.5million in funding from the Government of Canada, [82] however it was cancelled in 2023, citing federal red tape. [85] SME placed the turbines into storage and removed all of the equipment from the seabed. [86] However, one of the turbines broke its moorings and washed ashore in November 2023. [87]

In October 2022, the company split out its anchoring solutions as Swift Anchors, with the aim to focus on different technologies including Floating offshore wind. [88]

Tidal Energy Ltd

Tidal Energy Ltd - DeltaStream device installation in Ramsey Sound, Pembrokeshire in 2015 (c)Tidal Energy Ltd..jpeg
Tidal Energy Ltd - DeltaStream device installation in Ramsey Sound, Pembrokeshire in 2015

Tidal Energy Ltd (TEL) was a tidal stream developer based in Cardiff, Wales. They developed a three-bladed horizontal-axis turbine mounted on a 16 m long triangular gravity base. To increase reliability, a simple fixed-pitch blade design was used. [89]

A 400 kW prototype was installed in Ramsey Sound, Wales in December 2015 after sitting on the quayside at Pembroke Dock for over a year. [90] [91] In March 2016, the turbine developed "an intermittent fault with an active sonar" followed by a mechanical defect which prevented it generating. [92] After the company went into administration in October, [93] the Welsh Government sought a buyer for the turbine in December 2016. [92]

There were plans to remove the turbine as part of the Anglo-French Tidal Stream Industry Energiser Project (TIGER) project, and examine the reasons for the failures. The Ramsey Sound site was also to be redeveloped by Cambrian Offshore South West, with a new turbine of up to 1 MW installed. [94]

The triangular base frame was designed to support three turbines, although only a single turbine was tested. [91] Eco2 in conjunction with TEL had planned to install an array of nine devices St David's Head, to the north of Ramsey Sound. [90]

The 500 kW TGL DeepGen III tidal stream turbine at Hatston Pier, Orkney TGL DeepGen III at Hatston Pier.jpg
The 500 kW TGL DeepGen III tidal stream turbine at Hatston Pier, Orkney
The 1 MW TGL DeepGen IV tidal stream turbine at Hatston Pier, Orkney TGL DeepGen IV at Hatston Pier.jpg
The 1 MW TGL DeepGen IV tidal stream turbine at Hatston Pier, Orkney

Tidal Generation Ltd

Tidal Generation Ltd (TGL) was a Bristol-based developer of tidal stream turbines, founded in 2005. [95] It was acquired by Rolls-Royce, before being sold to Alstom in 2012. [95] [10] Then in 2015, General Electric acquired Alstom's energy division, including TGL. [11] In 2021 French tidal developer Sabella acquired General Electric's tidal energy assets, including those developed by TGL, Rolls-Royce and Alstom. [96]

TGL tested a 500 kW turbine at EMEC from September 2010 as part of the Deep-Gen III project. [95] This was the first turbine installed at EMEC that was eligible for Renewables Obligation Certificates. [97] By September 2012, it had generated over 250 MWh of electricity which was supplied to the local grid.

An upgraded 1 MW Deep-Gen IV turbine was developed while part of Rolls-Royce within the Reliable Data Acquisition Platform for Tidal (ReDAPT) project, partly funded by the Energy Technologies Institute. [97] The turbine rotor was 18 m in diameter, mounted on a 22 m long nacelle, with a mass of under 150 t. [98] It had cut-in, rated, and maximum flow speeds of 1 m/s, 2.7 m/s, and 5 m/s respectively.

In 2014, a 1.4 MW turbine was proposed, again with an 18 m diameter rotor. It was marketed as the Oceade™ 18 – 1.4 MW, but was never built. [99]

The TGL turbines were a three-bladed horizontal-axis design which could yaw to face the incoming tide, driven by a thruster on the rear of the nacelle. They nacelle of the turbine was buoyant, which allowed it to towed to site then installed onto the subsea tripod foundation using a winch system operated from small workboats. [100]

Tocardo

Tocardo BV is a Dutch tidal stream turbine developer, jointly owned by QED Naval and Hydrowing as of January 2020. [101] The company began developing their technology in 1999. The Tocardo turbines are two-bladed horizontal-axis with direct-drive generators.

A prototype T1 turbine was tested in the sluice of the Afsluitdijk (Closure Dyke) in the Netherlands in 2008. This was 2.8 m in diameter and rated at 45 kW. [102] In early 2015, a further three Tocardo T1 turbines were installed, each rated at 100 kW. [103]

In 2015, five Tocardo T2 turbines were installed on the Oosterscheldekering (Eastern Scheldt storm surge barrier) also in the Netherlands. These started generating electricity to the Dutch grid in 2016. [104] They were mounted on a frame supported by the road bridge which could rotate to lift all of the turbines out the water simultaneously. Each turbine was 5.26 m in diameter (87 m2 swept area) and rated at 250 kW for a total power of 1.25 MW. [105] The project was decommissioned after eight years of operation in 2023. [106]

In the BlueTec project a floating platform was moored near the Dutch island of Texel, with a Tocardo turbine mounted beneath it. It was initially installed in summer 2015 with a 100 kW T1 turbine, then reinstalled in early 2016 with a T2 turbine, and provided power to the local electricity grid. [107] The turbine was launched from Den Helder, and there were plans to also test a 50 kW Schottle turbine on the platform. [108]

Three Tocardo T1 turbines were integrated onto the 240 kW QED Naval Subhub community demonstrator platform in late 2021, with a plan to test the turbine in The Solent near Yarmouth, Isle of Wight, UK. [109]

The next generation of Tocardo T3 turbines are planned to be used on the tidal projects by Hydrowing and Môr Energy at Morlais, Wales. [110]

Verdant Power

Verdant Power, Inc is a developer of tidal stream turbines, based in New York, USA. They have tested turbines in the East River since 2006. An array of six 35 kW turbines supplied power to two local businesses from May 2007 to October 2008. [6] An upgraded platform with three turbines was installed in October 2020. [111]

Voith Hydro

The 1MW Voith HyTide tidal stream generator sitting on Hatston Pier, Orkney Voith HyTide 1MW at Hatston Pier.jpg
The 1MW Voith HyTide tidal stream generator sitting on Hatston Pier, Orkney

Voith Hydro Ocean Current Technologies GmbH was a joint venture between Voith Hydro and RWE Innogy that developed tidal stream turbines, however Innogy sold their stake in November 2013. [112] [113]

The 110 kW HyTide 110–5.3 turbine was tested in southern South Korea, near Jindo island in 2010, a 1/3rd scale prototype. This had a 5.33 m diameter rotor, 22 m2 swept area. The turbine was designed to be simple, with a direct-drive generator (without gearbox) and no yaw or blade pitch adjustment. It also had no dynamic seals, thus the generator was cooled by seawater. The turbine was prototype certified by Germanischer Lloyd. [114]

A full-scale 1 MW horizontal-axis turbine was then tested at EMEC between 2013 and 2015. [115] The HyTide 1000 had a 13 m diameter rotor (133 m2 swept area), and weighed around 200 tonnes. It was installed by SLA Offshore in September 2013, from the DP II vessel MV Lone. [116]

Voith also acquired the 250 kW Islay LIMPET wave power station in 2005. [117]

Zhejiang University

Zhejiang University has installed three tidal stream turbines to the north of Zhairuoshan Island ( 29°57′27.03″N122°4′57.31″E / 29.9575083°N 122.0825861°E / 29.9575083; 122.0825861 ), in the Zhoushan archipelago. [118] A 60 kW turbine was installed in 2014, a 120 kW turbine deployed in 2015, and a 600 kW turbine in 2018. [40]

List of grid-connected tidal stream generators

Over the years, many different tidal stream turbines have been deployed and tested at sea, and have delivered power to the local electricity grid. A non-exhaustive list is given in the table below, along with other notable devices. As most of these were development and test versions, they were removed for periods of time for maintenance or upgrades.

Manufacturer & TurbineTurbine Power

(MW)

CountryLocationCoordinatesCommDecomRef
MCT, SeaFlow

[not grid connected]

0.3Flag of the United Kingdom.svg  UK, Flag of England.svg EnglandLynmouth, Devon 51°15′22″N3°47′14″W / 51.25611°N 3.78722°W / 51.25611; -3.78722 2003–062006-01 [46]
Hammerfest Strøm, HS3000.3Flag of Norway.svg  Norway Kvalsundet 70°30′40.32″N23°56′38.4″E / 70.5112000°N 23.944000°E / 70.5112000; 23.944000 2004-012011-01 [3] [14] [16]
OpenHydro0.25Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

EMEC, Fall of Warness 59°9′27″N2°49′32.74″W / 59.15750°N 2.8257611°W / 59.15750; -2.8257611 2006yes [5]
Verdant Power ×60.035Flag of the United States.svg  USA,

Flag of New York.svg New York

 East River 40°45′24.66″N73°57′4.36″W / 40.7568500°N 73.9512111°W / 40.7568500; -73.9512111 2007-052008–10 [6]
Tocardo, T1 prototype0.045Flag of the Netherlands.svg  Netherlands Afsluitdijk sluice 52°56′06″N5°02′38″E / 52.935°N 5.044°E / 52.935; 5.044 2008 [119]
MCT, SeaGen 1.2Flag of the United Kingdom.svg  UK, Ulster Banner.svg Northern Ireland Strangford Narrows 54°22′7.2″N5°32′45.8″W / 54.368667°N 5.546056°W / 54.368667; -5.546056 2008–122018-08 [47]
Orbital, SR2500.25Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

EMEC 59°8′39.48″N2°48′55.68″W / 59.1443000°N 2.8154667°W / 59.1443000; -2.8154667 2011-012013-08
Hammerfest Strøm, HS10001EMEC2012-022015-01 [3] [17]
Sabella D101Flag of France.svg  France Fromveur Passage, Brittany 48°26′54″N5°1′48″W / 48.44833°N 5.03000°W / 48.44833; -5.03000 2015-04Operational
Nova Innovation, Nova 300.03Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

 Bluemull Sound, Shetland 60°41′59.6″N0°58′58.1″W / 60.699889°N 0.982806°W / 60.699889; -0.982806 2014-042016 [52]
Tocardo, T1 ×30.045Flag of the Netherlands.svg  Netherlands Afsluitdijk sluice 52°56′10″N5°02′42″E / 52.936°N 5.045°E / 52.936; 5.045 2015-02 [119]
Tocardo, T1 then T20.1 Texel, Wadden Sea 53°00′N4°48′E / 53.00°N 4.80°E / 53.00; 4.80 2015 [107]
OpenHydro ×2

[never grid connected]

0.5Flag of France.svg  France Paimpol–Bréhat, Brittany 48°50′N3°01′W / 48.833°N 3.017°W / 48.833; -3.017 20162017 [120] [121] [122]
Zhoushan tidal power station0.4Flag of the People's Republic of China.svg  China Zhoushan, Zhejiang 30°8′15.48″N122°10′1.25″E / 30.1376333°N 122.1670139°E / 30.1376333; 122.1670139 2016Operational [39]
0.6
Nova Innovation, M1000.1Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

Bluemull Sound, Shetland 60°41′59.6″N0°58′58.1″W / 60.699889°N 0.982806°W / 60.699889; -0.982806 2016-032023-06 [7] [54]
Nova Innovation, M1000.1Bluemull Sound, Shetland 60°41′59.6″N0°58′58.1″W / 60.699889°N 0.982806°W / 60.699889; -0.982806 2016-072023-06 [7] [54]
Orbital, SR20002EMEC 59°8′39.48″N2°48′55.68″W / 59.1443000°N 2.8154667°W / 59.1443000; -2.8154667 2016-102018-08 [55]
OpenHydro2Flag of Canada (Pantone).svg  Canada Grand Passage, Bay of Fundy 2016-112017-06 [123]
Andritz Hydro Hammerfest, HS1000 Mk1 ×31.5Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

Meygen 58°39′30″N3°7′30″W / 58.65833°N 3.12500°W / 58.65833; -3.12500 2016-12Operational [124]
SIMEC Atlantis, AR15001.5Meygen 58°39′30″N3°7′30″W / 58.65833°N 3.12500°W / 58.65833; -3.12500 2017-02Operational [9]
Nova Innovation, M1000.1Bluemull Sound, Shetland 60°41′59.6″N0°58′58.1″W / 60.699889°N 0.982806°W / 60.699889; -0.982806 2017-072023-06
OpenHydro2Flag of Canada (Pantone).svg  Canada Grand Passage, Bay of Fundy 2018-072018-09 [123]
Zhoushan tidal power station0.3Flag of the People's Republic of China.svg  China Zhoushan, Zhejiang 30°8′15.48″N122°10′1.25″E / 30.1376333°N 122.1670139°E / 30.1376333; 122.1670139 2018-12Operational [40]
0.4
Magallanes Renovables, ATIR1.5Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

EMEC 59°8′29.08″N2°49′6.5″W / 59.1414111°N 2.818472°W / 59.1414111; -2.818472 2019-02Operational

[note 1]

[125] [126]
HydroQuest, OceanQuest1.0Flag of France.svg  France Paimpol–Bréhat, Brittany 48°50′N3°01′W / 48.833°N 3.017°W / 48.833; -3.017 2019-042020-12 [127] [34]
Verdant Power, Gen5 ×30.07Flag of the United States.svg  USA,

Flag of New York.svg New York

 East River 40°45′24.66″N73°57′4.36″W / 40.7568500°N 73.9512111°W / 40.7568500; -73.9512111 2020-10Operational [111]
Nova Innovation, M100-D0.1Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

Bluemull Sound, Shetland 60°41′59.6″N0°58′58.1″W / 60.699889°N 0.982806°W / 60.699889; -0.982806 2020-10Operational [128]
SIMEC Atlantis, AR5000.5Flag of Japan.svg  Japan Naru Island 32°50′N128°54′E / 32.833°N 128.900°E / 32.833; 128.900 2021-022023-12 [note 2] [61] [62]
Orbital, O2 2Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

EMEC 59°8′39.48″N2°48′55.68″W / 59.1443000°N 2.8154667°W / 59.1443000; -2.8154667 2021-10Operational [55]
Sustainable Marine Energy, PLAT-I 6.40.42Flag of Canada (Pantone).svg  Canada Grand Passage, Bay of Fundy 45°20′36″N64°23′34″W / 45.34333°N 64.39278°W / 45.34333; -64.39278 (Pempa’q In-Stream Tidal Energy Project) 2022-042023-05 [83] [85]
Nova Innovation, M100-D ×20.1Flag of the United Kingdom.svg  UK

Flag of Scotland.svg Scotland

Bluemull Sound, Shetland 60°41′59.6″N0°58′58.1″W / 60.699889°N 0.982806°W / 60.699889; -0.982806 2023-01Operational [53]

Notes

  1. ↑ Off-site from 2020 to 2001 to 2021–04
  2. ↑ Turbine to be upgraded and redeployed in 2025

Related Research Articles

<span class="mw-page-title-main">Tidal power</span> Technology to convert the energy from tides into useful forms of power

Tidal power or tidal energy is harnessed by converting energy from tides into useful forms of power, mainly electricity using various methods.

<span class="mw-page-title-main">European Marine Energy Centre</span>

The European Marine Energy Centre (EMEC) Ltd. is a UKAS accredited test and research centre focused on wave and tidal power development, based in the Orkney Islands, UK. The centre provides developers with the opportunity to test full-scale grid-connected prototype devices in wave and tidal conditions, at pre-consented test sites. EMEC also has sites for testing smaller-scale prototypes in more sheltered conditions.

The Oyster was a hydro-electric wave energy device that used the motion of ocean waves to generate electricity. It was made up of a Power Connector Frame (PCF), which is bolted to the seabed, and a Power Capture Unit (PCU). The PCU is a hinged buoyant flap that moves back and forth with movement of the waves. The movement of the flap drives two hydraulic pistons that feed high-pressured water to an onshore hydro-electric turbine, which drives a generator to make electricity. Oyster was stationed at the European Marine Energy Centre (EMEC) at its Billia Croo site in Orkney, Scotland until the company ceased trading in 2015.

<span class="mw-page-title-main">Tidal stream generator</span> Type of tidal power generation technology

A tidal stream generator, often referred to as a tidal energy converter (TEC), is a machine that extracts energy from moving masses of water, in particular tides, although the term is often used in reference to machines designed to extract energy from the run of a river or tidal estuarine sites. Certain types of these machines function very much like underwater wind turbines and are thus often referred to as tidal turbines. They were first conceived in the 1970s during the oil crisis.

The Paimpol–Bréhat tidal farm is a tidal stream turbine demonstration site, located northeast of Île-de-Bréhat near Paimpol, Brittany, France. It was initially developed by Électricité de France (EdF), initiated in 2004 and construction work began in 2008, but the project was subsequently cancelled by EdF in 2018. This project was to use OpenHydro turbines, with two briefly installed in 2016, but they were later removed.

MeyGen is a tidal stream energy plant in the north of Scotland. The project is located in the Pentland Firth, specifically the Inner Sound between the Island of Stroma and the Scottish mainland.

<span class="mw-page-title-main">SAE Renewables</span>

SAE is a renewable energy company. It is incorporated in Singapore, but its operational headquarters are in Edinburgh, Scotland, United Kingdom. Initially, it was a developer of the tidal power turbines and projects, but after becoming a part of GFG Alliance it has expanded its business also to the waste-to-energy and hydropower.

<span class="mw-page-title-main">Orbital O2</span> Orbital O2 floating tidal stream turbine

Orbital Marine Power is a Scottish renewable energy company focused on the development and global deployment of its pioneering floating turbine technology. The O2 is Orbital's first commercial turbine and represents the culmination of more than 15 years of world leading product development in the UK. The 74 m long turbine is expected to operate in the waters off Orkney for the next 15–20 years with the capacity to meet the annual electricity demand of around 2,000 UK homes with clean, predictable power from the fast-flowing waters while offsetting approximately 2,200 tonnes of CO2 production per year. In a further ground-breaking element of the project, the O2 will provide power to the European Marine Energy Centre's onshore electrolyser to generate green hydrogen that will be used to demonstrate decarbonisation of wider energy requirements.

Morlais is a grid connected tidal stream energy project located in the Irish Sea just off the west coast of Holy Island, Anglesey, Wales. It is being developed by the social enterprise agency Menter Môn. The site has the potential for up to 240 MW of renewable energy to be harnessed from the tides, using a mixture of seabed mounted and floating tidal energy devices from different companies.

Nova Innovation Ltd is a Scottish developer of tidal stream turbines, based in Leith, Edinburgh. They deployed their first 30 kW turbine in 2014. Since then, they have developed and tested a 100 kW seabed mounded two-bladed horizontal-axis tidal stream turbine, and plan to scale this up in future. Up to six of these turbines have been deployed simultaneously in the Bluemull Sound, Shetland since 2016.

<span class="mw-page-title-main">OpenHydro</span> Defunct Irish turbine developer company

OpenHydro Group Ltd was an Irish developer of tidal stream turbines, established in 2004. It was acquired by Naval Energies in 2013, however, Naval Energies decided in July 2018 to stop developing tidal turbines and focus on floating wind turbines. The company subsequently went into liquidation with debts of about €280m.

Minesto AB is a Swedish developer of electricity producing tidal kite turbines, based in Gothenburg. They also have a manufacturing base in Holyhead, North Wales, and a test facility at Portaferry, Northern Ireland.

CorPower Ocean AB is a wave energy device developer, headquartered in Stockholm, Sweden. They also have offices in Oslo, Viana do Castelo, and Stromness. The office in Viana do Castelo is an R&D centre that also serves as the manufacturing and service centre for the wave energy converters (WEC).

<span class="mw-page-title-main">Aguçadoura test site</span> Portuguese offshore renewable energy test site

The Aguçadoura test site is an offshore location in the north of Portugal where grid connected offshore renewable energy devices have been tested, for research and project demonstration. It is about 5 km (3 miles) off the coast of Aguçadoura, Póvoa de Varzim, about 35 km NNE of central Porto.

<span class="mw-page-title-main">Wello Penguin</span> Wave power device

The Penguin is a wave energy converter (WEC) which was developed by Finnish company Wello Oy between 2008 and 2023. Two full-scale device were constructed, and tested in Scotland and Spain respectively, although both tests ended in difficulties.

Magallanes Renovables, S.L. is a Spanish developer of floating tidal stream energy devices, set up in 2009. The company's head office is in Redondela, Galicia, with a UK subsidiary Magallanes Tidal Energy Ltd. based in Kirkwall.

Sabella SAS was a French company which developed and manufactured tidal stream turbines. It was a SME, founded in 2008, and based in Quimper, Brittany.

HydroQuest SAS is a French developer of vertical-axis turbines, generating electricity from river and tidal currents.

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