New Mapping Tool Shows Tidal Power Potential

IEEE Spectrum has an article on efforts to map tidal power potential in the US - New Mapping Tool Shows Tidal Power Potential.

A group at Georgia Tech University has created a database-driven mapping tool aimed at illustrating the tidal power potential around the coastlines of the entire United States. The map was validated by the Department of Energy, and is now available to all.

There arent yet any major tidal power installations in the US, but according to the DOE, the map indicates strong potential in both the Northeast and Northwest. Some related projects do exist, like turbines under the East River in New York. Atlantis Resources Corporation, which makes a double-turbine type of tidal power device, has several projects under development around the world, including in India.

And as with any type of energy, assessing tidal powers practical generation potential is the first step. Though some reports have suggested a global capacity of 90 gigawatts, or a US potential equaling 15 percent of total electricity requirements, assessments on a more local, project-specific level will now be easy with the Georgia Tech map.

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India’s first tidal energy plant coming up in Gujarat

The Weekend Leader has an update on a proposed tidal power plant in India - India’s first tidal energy plant coming up in Gujarat.

The Gujarat government is all set to develop India’s first tidal energy plant. The state government has approved Rs 25 crore for setting up the 50 MW plant at the Gulf of Kutch. It will produce energy from the ocean tides.

The state government signed a MoU with Atlantis Resource Corporation last year to develop the plant.

According to an estimate, India has a potential of 8,000 MW of tidal energy “The proposal was approved in this year’s budget session,” says Rajkumar Raisinghani, senior executive with Gujarat Power Corporation Limited (GPCL).

Atlantis Resource Corporation is a UK-based developer of tidal current turbines. “The equipment has been imported and work will start anytime soon. We are awaiting Coastal Regulation Zone clearance from Ministry of Environment and Forests, which is expected soon,” adds Raisinghani.

According to the GPCL officials, if this 50 MW plant is successfully commissioned, its capacity will be increased to 200 MW. As per a study conducted by Atlantis Resource Corporation and the state government two years ago, the Gulf of Kutch has a total potential of 300 MW. The biggest operating tidal station in the world, La Rance in France, generates 240 MW.

According to the estimates of the Indian government, the country has a potential of 8,000 MW of tidal energy. This includes about 7,000 MW in the Gulf of Cambay in Gujarat, 1,200 MW in the Gulf of Kutch and 100 MW in the Gangetic delta in the Sunderbans region of West Bengal.

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Giant tidal device set for tests off Orkney

The BBC has a report on testing of a tidal power design in Scotland - Giant tidal device set for tests off Orkney.

A giant underwater turbine which could form the worlds first tidal power array has been deployed off Orkney. The 100ft-high 1MW (megawatt) Hammerfest Strom HS1000 device was installed by the European Marine Energy Centre (EMEC). It will now undergo tests in preparation for larger-scale production and deployment.

Scottish Power Renewables (SPR) hopes to use the design for a planned array in the Sound of Islay. The device has been developed by Hammerfest Strom, a company partly owned by SPR parent firm Iberdrola. Its substructure was constructed in the Arnish Yard, near Stornoway, in Lewis.

SPR intends to develop a 10MW tidal array in Islay after receiving planning consent from the Scottish government in March this year.

The HS1000 device, which SPR said could power the annual electricity needs of 500 homes, is expected to be fully operational in early 2012. The tests will also help to finalise the timetable for the Islay project, with machines being installed "as early as feasible" between 2013 and 2015.

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Floating tidal power plant opened in Norway

Renewable Energy Focus has an article on the launch of Hydra Tidal’s floating tidal power plant, Morild II, in Lofoten, Northern Norway - Floating tidal power plant opened in Norway.

The opening of the 1.5 MW tidal power plant marks the start of the planned two-year trial period for testing and verification of Morild II and the technology.

The tidal turbine blades are made of laminated wood with a diameter of 23 m.

“We know of no comparable floating tidal power plants in the world. There are smaller scale models that have been installed, but Morild II is a full-scale plant. The largest known turbine diameter of other power plants is 18 meters, and the largest installed power known to us is 1 MW. Thus we can imply with a fair amount of certainty that Morild II is the largest tidal power plant of its kind,” says the CEO of Hydra Tidal, Eivind Nydal.

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Scottish Government gives go ahead to world’s largest tidal power project

Energy Efficiency News has a post on a tidal power project in Scotland - Scottish Government gives go ahead to world’s largest tidal power project.

The Scottish Government has given the go ahead to what will be the world’s largest tidal stream energy array to date in the Sound of Islay.

The £40 million ScottishPower Renewables development of underwater turbines will have a capacity of 10 MW, generating enough electricity to power around 5000 homes and eight local distilleries and maltings.

“With around a quarter of Europe’s potential tidal energy resource and a tenth of the wave capacity, Scotland’s seas have unrivalled potential to generate green energy, create new, low carbon jobs, and bring billions of pounds of investment,” commented Cabinet Secretary for Finance and Sustainable Growth John Swinney in a statement yesterday.

He said that ScottishPower Renewables, which is owned by Spanish power giant Iberdrola Renovables, will work with the Islay Energy Trust to maximise local social and economic benefits.

Local Scottish businesses are also set to benefit, with £4 million in contracts to make the turbines, with a test prototype being manufactured at Burntisland Fabrication’s (BiFab) facility in Arnish.

BiFab has a £2 million contract to build turbines for the ten 1 MW HS1000 devices to be used in the Islay project, which are being developed by Hammerfest Strøm, a joint venture between Scottish Power Renewables and Norwegian energy companies.

A prototype of the HS1000 device has been generating electricity in Norwegian waters for six years and the company is currently constructing the first commercial-scale device for testing in Scottish waters off Orkney later in the year.

Scotland is one of the leaders in tidal development, with world’s first commercial wave and tidal leasing round already underway for the Pentland Firth, which could ultimately produce some 1600 MW of marine energy.

“[The] announcement moves the whole marine renewables industry forward in Scotland and the UK,” says Keith Anderson, chief executive of ScottishPower Renewables. “The understanding we develop from Islay will be essential in delivering the larger planned projects in the Pentland Firth.”

The testing of the HS1000 later this year in Orkney will determine the rollout of the devices in Islay, but ScottishPower Renewables expects to start work on the project next year and start installation between 2013 and 2015.

New Zealand is also looking to develop some large scale tidal power - Kaipara tide turbine plan gets Govt green light.

A $600 million proposal to create New Zealands first tide-driven power station in the Kaipara Harbour has been approved by Government despite concerns it could kill off fish stocks and threaten critically endangered Maui dolphin.

Conservation Minister Kate Wilkinson this morning signed off the staged installation of 200 tidal turbines near the mouth of the harbour by Crest Energy.

Local fisherman, Te Uri O Hau Settlement Trust and the Department of Conservation had opposed the plan, arguing it could reduce west coast snapper stocks, threaten the environment of the pristine harbour and impact Maui dolphin numbers.

But Ms Wilkinson backed an Environment Court ruling approving the station on the condition it started with only three turbines and conducted two years of environmental monitoring.

If fully implemented, it is estimated the development could generate enough electricity to power the area from Aucklands North Shore to Cape Reinga, she said.

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