Irish company OpenHydro is preparing to put a new and upgraded tidal turbine through its paces at EMEC, the European Marine Energy Centre.

The Dublin-based renewables business succeeded in installing its first Open-Centre Turbine at EMEC's tidal test site almost a year ago.

Since then, the innovative technology has undergone a series of tests at the Fall of Warness, a fast flowing tidal channel off the island of Eday.

"We've learned a huge amount as a result and the turbine has performed extremely well," said OpenHydro chief executive James Ives.

The original six-metre turbine has been removed from the test site, ready for the new machine to take its place. This is due to arrive during the coming weeks.

"It's identical in appearance, however the turbine has been enhanced in a number of important areas," said Mr Ives. "Developing new technology is an evolutionary process and each time we build a new generation turbine, we'll be testing it at EMEC."

Using the experience gained in Orkney, OpenHydro is developing commercial tidal energy projects in Nova Scotia and the Channel Islands.

EMEC managing director Neil Kermode said: "I'm pleased we've been able to provide OpenHydro with the test facilities they require as they take this revolutionary technology into the commercial arena.

"We're delighted the experience has led to the commissioning of a second turbine and look forward to its arrival in the next few weeks."

EMEC was established with around £15 million of funding from the Scottish Government, the HIE network, the Carbon Trust, the Department of Trade and Industry and other public sector agencies.

It also operates a wave energy test site in Atlantic waters off Stromness.