Startup taps underwater volcano as energy source in "proof point" test
Summary
A startup called Endurance Energy tested the world’s first underwater geothermal power plant near an underwater volcano about a mile deep in the Pacific Ocean. The small test showed it is possible to use heat from under the ocean floor to create electricity, but more work is needed to make this cost-effective and reliable.Key Facts
- The test happened near the Axial Seamount, an active underwater volcano in the northeast Pacific Ocean.
- The prototype power plant, weighing 3 tons, ran for less than 10 seconds of net-positive electricity.
- The test included drilling two holes about 52 feet deep in the seafloor at a depth of roughly 5,000 feet.
- The drilled holes vented very hot fluids at about 500° F (260° C), which the plant uses to create steam to power a turbine and generator.
- The initial drill hole was smaller and shallower than typical land geothermal wells, limiting fluid flow and power generation.
- The startup aims to drill deeper wells (up to 260 feet) to get more hot fluid and improve power output.
- The power plant connected to a 559-mile undersea fiber-optic and electric cable network for power and communication.
- The company plans to offer this technology to Pacific island nations and others seeking renewable energy alternatives to fossil fuels.
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