Wave Power All At Sea In The UK  

The Times has a report on the slow pace of development of wave power in the UK - Wave power all at sea until tide turns.

Jim Mather, the energy minister, has described marine power as “the heart of our ambitions to develop a vibrant renewables sector”. John Griffiths, a non-executive director of the Orkney centre, is clear where blame lies. “In 1999 everybody was saying that come 2005 we should be moving towards a range of commercial tidal and wave devices. That time has gone and among the things that have held up progress has been a huge emphasis on wind. Some of the inertia has been evident from Westminster compared to the Scottish government. There is a dearth of funding in wave and tidal power.” ...

Orkney is to test a number of projects, such as Ocean Power Technology’s PowerBuoy system. Another, OpenHydro’s tidal turbine, was connected to the national grid last May, generating electricity to power up to 100 homes. But progress is slow when financial support is muted.

“The sea is a harsh environment,” says Peter Fraenkel, technical director of Marine Current Turbines, which installed a device in Northern Ireland’s Strangford Lough. Looking like an upside down windmill, the structure has the potential to generate electricity to power 1,140 homes. “The sheer force of fast moving water is horrendous,” says Fraenkel. “It takes modern engineering capabilities to come up with solutions. Marine power subsidies are not as generous as they should be.”

Some say Britain is making the same mistakes as in the early years of wind power. “We don’t have a wind industry because in the early days of wind turbine development it wasn’t taken seriously by government,” says Fraenkel. We did not invest in the technology, allowing Danish and German firms to develop it. Now they are making money across the globe.

Tide and wave power will need government help to become commercially viable. Otherwise they too could be developed abroad, and we will miss the chance of a lucrative industry offering highly skilled engineering and manufacturing jobs.

A man particularly aware of Britain’s neglect of renewables is Professor Stephen Salter, generally regarded as the pioneer of wave power. He invented a device in the 1970s called Salter’s Edinburgh Duck, which could extract 90% of energy from waves. But the UK government withdrew funding from wave power in 1982, many believe because of the influence of the nuclear industry. ...

Salter wrote an energy review document for the SNP two years ago that suggested previous calculations of the energy potential of the Pentland Firth, the deep body of water that separates the Orkney Islands from Caithness and is renowned for the strength of its tides, were underestimated.

He believes that if turbines can be designed to work on the bottom of the sea bed, 70m down, and be placed close together, up to 20GW of energy could be extracted from the firth.

Yet having spent 35 years in the field, he, too, is dismayed by the lack of drive from Westminster. “Marine power should be getting a different flavour of subsidies because the wind people are now building in such quantity they are getting their price reduction,” he says. “If we just go on the way we are, nobody will do anything except wind. I think there are still people around who don’t want it to work and who want to go to nuclear.”

Britain boasts almost half of Europe’s tidal stream sites — where the underwater currents can be used to drive turbines — and 47% of Europe’s wave resource. ...

"Wave and tidal power ... could be key for sustainable UK electricity generation in the long term, and provide huge commercial opportunities. We want to lead the way, and that’s why we are undertaking a feasibility study on whether to support a barrage or another project to exploit the tidal power of the Severn estuary,” [Des Browne] said.

Griffiths is less convinced. “The government put into research and development for nuclear something like half a billion a year, for about 17 years,” he says. “If they had put 10% of that [into wave and tidal power] every year since 1999, the marine power situation would look different.”