European Marine Energy Centre
The European Marine Energy Centre (EMEC) is a UKAS accredited test and research centre focusing on wave and tidal power development based in the Orkney Islands, UK. It claims to provide developers with the opportunity to test full-scale grid-connected prototype devices in unrivalled wave and tidal conditions. The operations are spread over three sites:
- Billia Croo, Mainland (wave power)
- Fall of Warness, off the island of Eday (tidal power)
- Stromness (office and data facilities)
EMEC was established by a grouping of public sector organisations following a recommendation by the House of Commons Science and Technology Committee in 2001. The centre offers, apart from access to water with high wave and tidal energy potential, various kinds of support regarding regulatory issues, grid connection and meteorological monitoring as well as local research and engineering support.
EMEC’s wave test facility is placed on the western edge of the Orkney mainland, in an area with one of the highest wave energy potentials in Europe. The exposed North Sea location means the island group is subjected to the powerful dynamic forces of the North Atlantic Ocean. Construction of the wave test facility was completed in October 2003, and operational activities commenced shortly thereafter. The centre's facilities consist of five test berths situated along the 50m water depth contour off Billia Croo, Stromness on the Orkney mainland (some 2 km offshore) and two shallow water berths situated close to the substation.
The following have been installed or are expected to be so soon :
- Pelamis Wave Power (PWP) installed its prototype Pelamis 750 device on site for full-scale testing in August 2004. This wave energy conversion machine was the first in the world to generate electricity into a grid system from offshore wave energy. To date PWP has continued to undertake various tests as part of its ongoing development programme.
- Scottish Power and Pelamis Wave Power are working in co-operation and are testing a second-generation Pelamis P-2 devices in conjunction with a second P2 device, previously owned by E.on from 2010. but now transferred to Pelamis Wave Power in 2013.
- AW-Energy from Finland undertook stand-alone mechanical testing in 2005 in the shallower waters at the test site.
- Aquamarine Power Ltd installed its Oyster wave power device on the seabed in August 2009 and generated electricity for the first time in November of the same year. Aquamarine installed its Oyster 2 800kW wave energy converter in the summer of 2011.
- Ocean Power Technologies (OPT) was scheduled to deploy its PowerBuoy in 2009 but instead decided to conduct sea trials in the Moray Firth in 2010.
- Wello, a Finish based company, is currently testing its Penguin wave energy converter at the EMEC site throughout 2012/2013.
- Seatricity, an Antigua based company, has taken the other near shore berth. It will adopt a similar method to Aquamarine Power of using its device to pump water ashore to a standard hydro-electric power take-off system. it has already been involved in testing a number of its buoy units at the test site and is expected to deploy a full scale array in 2014.
Funding from The Scottish Government to support the installation of a new grid-connected testing berth was announced in February 2013.
Further infrastructure works continue at Billia Croo to provide a laydown area for future developers to use, similar to that already created at the tidal site. Other site works which have completed include an upgrade to the Black Craig lookout point, which includes the facilities for stationed wildlife observers. These trained observers and a high-spec camera will provide essential baseline data for the wave test site.
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The tidal power test site at the Fall of Warness, to the west of the island of Eday, was chosen for its high velocity marine currents which reach almost 4 m/s (7.8 knots) at spring tides. The facility offers five test berths at depths ranging from 25 m to 50 m in an area 2 km across and approximately 4 km in length.
From each developer berth, the subsea cables follow back along the seabed and then pass under the beach and into an external housing next to the substation. An adjacent laydown area then provides an optional area for developers to use conditioning equipment for converting from the level at which they are generate to grid compliant electricity. Underground ducts then connect the cables through to the switchboard in the substation building. The substation building has four separate areas: the HV switchroom, communications room, personnel room and the standby generator room.
The test site was officially opened by Scotland's First Minister in September 2007.
The first developer to use the site is Dublin based OpenHydro, who began the installation of their open centred turbine in 2006. Full testing is now underway, with their device becoming the first to be grid connected in Scotland and subsequently the first tidal stream generator to successfully generate electricity to the National Grid in the UK. OpenHydro are pleased with the outcome and are moving into the next phase of their testing. This has involved placing a blank turbine on the seabed adjoining their installed device, using the specially commissioned “OpenHydro Installer” in summer 2008.
Tidal Generation Ltd were on site during 2008, undertaking preparation works for deploying their device in 2009.
Hammerfest Strom UK Ltd has deployed an Acoustic Doppler Current Profiler (ADCP) and turbulence meter at the site, preparatory to their device deployment in 2010.
Other developers are planning preparation works, with deployments of further tidal turbines scheduled for 2009 and 2010.
The wildlife observations at the test site which have been underway since June 2005 are continuing to provide essential baseline environmental data. Further baseline data gathering projects are planned to commence soon.
Marine industry standards
EMEC has coordinated the development of a suite of standards on behalf of the marine renewable energy industry. Each document has been progressed by a working group with individuals representing technology developers, regulators, academia, utilities, and project developers – a true cross-section of the marine energy industry. These standards have recently been launched and are available free for download from the EMEC website: EMEC Standards.
Research and monitoring
For most developers coming to deploy at EMEC, installation at these facilities will be the first time their device has been in the open sea and grid connected. They typically will not have a track record which indicates the type and extent of interactions between the device and the receiving environment. Therefore, whilst the central purpose of EMEC is to provide an operational test facility, there is also a key role in establishing and facilitating monitoring of devices in relation to their impacts on the receiving environment. The main driver to this has been through the consenting process, which requires developers to consider environmental issues prior to testing at EMEC and to mitigate against any potential for negative impact.
The involvement within the research field has led EMEC to occupy a unique position, having links with a range of different developers and devices, as well as academic institutions and regulatory bodies. EMEC is independent of any developer or device, as EMEC aims to ensure that different devices are monitored in a consistent way, using the best available methods. Independence of EMEC also encourages the dissemination of monitoring information can be carried out throughout the industry.
Power Purchase Agreement
- "European Marine Energy Centre". Retrieved 2007-02-03.
- "E.ON announce world first for its P2 wave energy device". Retrieved 2010-12-03.
- Independent on Sunday (London) May 29, 2005, Sunday, Tim Webb, "Sandals and beards are banished in a quest to find 20,000 volts under the sea. Tim Webb travels to the Orkneys to discover a source of clean power." First Edition; BUSINESS; Pg. 15
- "Oyster wave power in operation". Retrieved 2010-12-03.
- "Aquamarine Power - How Oyster wave power works". Retrieved 27 June 2011.
- "OPT - PowerBuoy test in Scotland". Retrieved 6 October 2013.
- "Penguin's safe arrival after 10 day voyage". Retrieved 2011-06-27.
- "Press Release: Scottish Government Invests £4.1m in EMEC". Retrieved 2013-03-20.
- "OpenHydro becomes the first Tidal Energy company to generate electricity onto the UK National Grid". 2008-05-27. Retrieved 2008-08-16.[dead link]