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  • We all know energy can come from the wind and the sun, but there's a plentiful renewable

  • resource covering more than 75% of the planet that you might not have thought about: our

  • water! The movement of the ocean's waves, tides,

  • and currents carries energy that can be harnessed and converted into electricity to power our

  • homes, buildings and cities. The energy available in this moving water

  • is called kinetic energy. Scientists and engineers are learning to capture clean renewable ocean

  • power using marine and hydrokinetic technologies. Water currents occur naturally all over the

  • planet. Waves crash against coastlines. Tidal currents ebb and flow and large currents move

  • water all around our oceans. We can tap into each one of these sources

  • to generate electricity. It's estimated that along U.S. coastlines, there is enough energy

  • in waves and tides to meet a significant portion of America's power needs.

  • So, how does it work? That depends on what kind of hydrokinetic power you're trying to

  • capture, but the concept is essentially the same: extracting power from moving water.

  • For example, a buoy can harness energy from the vertical rise and fall of ocean waves,

  • as well as back-and-forth and side-to-side movements.

  • Currents and tides can also spin a turbine in various directions as water moves through

  • an ocean power device, generating electricity. The Energy Department is supporting research

  • on a range of innovative turbine technologies to capture energy from waves, river, and tidal

  • currents. Devices that operate in water have to work

  • under turbulent and harsh conditions. They must be built to withstand strong currents

  • and impacts from debris carried in the water. Of course, they also have to be designed to

  • preserve the integrity of the marine environment. One of the greatest benefits of developing

  • marine energy or, ocean power, is that many of our water resources are right where we

  • need them -- near the most populated areas. More than half of all Americans live close

  • to coastlines where the potential for ocean power is the greatest, and some cities and

  • towns can use power from tidal currents. Marine and hydrokinetic technologies are still

  • a ways off from widespread adoption. But today, dozens of organizations are already working

  • to deploy ocean power systems throughout the world.

  • Marine and hydrokinetic technology: a new wave in harnessing clean, renewable energy

  • from all sorts of water resources right here at home.

We all know energy can come from the wind and the sun, but there's a plentiful renewable


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B1 中級

エネルギー101:海洋エネルギーと水力エネルギー (Energy 101: Marine and Hydrokinetic Energy)

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    richardwang に公開 2021 年 01 月 14 日