Ambitious plans for ocean energy plants have rarely run smoothly—China installed dozens of tidal plants in the 1960s and 1970s, most of which are defunct now. More recently, the “Pelamis wave energy machine,” named after a species of sea snake, dates back to 1998, though the first prototype didn’t appear until 2004. Three Pelamis machines were deployed off of Portugal in September of 2008, but the project was iced two months later, because of mechanical problems and after the project’s owner, investment bank Babcock & Brown, went into liquidation.

Now the Pelamis is testing a “second generation” machine for energy giant E.ON off the coast of Scotland.

A tidal project in Eastport, Maine, which has advocates dating back to US president Franklin D. Roosevelt, finally became a reality in August 2012, when a turbine “eggbeater turned sideways” was lowered into the water.

Image for article titled China pursues the holy grail of ocean energy, in a massive way
Image: Ocean Renewable Power Co.

While surging water loosened bolts and caused other mechanical problems and delays, the turbine did generate enough energy to power 25 homes and an additional turbine will be added this year.

Despite the delays and setbacks, the money keeps flowing in to ocean energy research, and not just from China. Private investment in European ocean and wave technology energy ventures was about $825 million over the past seven years, the Wall Street Journal reported. In August of last year, the US Department of Energy said it would invest about $16 million in projects on US coasts and waterways.

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