Oct 122017

via Virginia Places

There is considerable opportunity for generating wind power in the open ocean, particularly the North Atlantic, according to new research from Carnegie’s Anna Possner and Ken Caldeira.

Their work is published by Proceedings of the National Academy of Sciences.

Because wind speeds are higher on average over ocean than over land, wind turbines in the open ocean could in theory intercept more than five times as much energy as wind turbines over land. This presents an enticing opportunity for generating renewable energy through wind turbines. But it was unknown whether the faster ocean winds could actually be converted to increased amounts of electricity.

“Are the winds so fast just because there is nothing out there to slow them down? Will sticking giant wind farms out there just slow down the winds so much that it is no better than over land?” Caldeira asked.

Most of the energy captured by large wind farms originates higher up in the atmosphere and is transported down to the surface where the turbines may extract this energy. Other studies have estimated that there is a maximum rate of electricity generation for land-based wind farms, and have concluded that this maximum rate of energy extraction is limited by the rate at which energy is moved down from faster, higher up winds.

“The real question is,” Caldeira said, “can the atmosphere over the ocean move more energy downward than the atmosphere over land is able to?”

Possner and Caldeira’s sophisticated modeling tools compared the productivity of large Kansas wind farms to massive, theoretical open-ocean wind farms and found that in some areas ocean-based wind farms could generate at least three times more power than the ones on land.

In the North Atlantic, in particular, the drag introduced by wind turbines would not slow down winds as much as they would on land, Possner and Caldeira found. This is largely due to the fact that large amounts of heat pour out of the North Atlantic Ocean and into the overlying atmosphere, especially during the winter. This contrast in surface warming along the U.S. coast drives the frequent generation of cyclones, or low-pressure systems, that cross the Atlantic and are very efficient in drawing the upper atmosphere’s energy down to the height of the turbines.

“We found that giant ocean-based wind farms are able to tap into the energy of the winds throughout much of the atmosphere, whereas wind farms onshore remain constrained by the near-surface wind resources,” Possner explained.

However, this tremendous wind power is very seasonal. While in the winter, North Atlantic wind farms could provide sufficient energy to meet all of civilization’s current needs, in the summer such wind farms could merely generate enough power to cover the electricity demand of Europe, or possibly the United States alone.

Wind power production in the deep waters of the open ocean is in its infancy of commercialization. The huge wind power resources identified by the Possner and Caldeira study provide strong incentives to develop lower-cost technologies that can operate in the open-ocean environment and transmit this electricity to land where it can be used.



The Latest on: Open ocean wind farms
  • Huge energy potential in open ocean wind farms in the North Atlantic
    on October 12, 2017 at 12:39 pm

    Because wind speeds are higher on average over ocean than over land, wind turbines in the open ocean could in theory intercept more than five times as much energy as wind turbines over land. This presents an enticing opportunity for generating renewable ... […]

  • Here’s how much of the ocean would need to be covered in wind turbines to power Earth
    on October 11, 2017 at 10:00 pm

    The researchers found that up to 4 times more wind power per square meter can be extracted from open ocean farms than current land-based techniques. With this increased wind intensity, it was discovered that 3 million wind turbines, each placed in its own ... […]

  • Wind Turbines Stretched Across Oceans Would Generate Enough Power For The Whole Civilization: Study
    on October 10, 2017 at 10:54 pm

    and maintain ocean-based wind turbines at such a grand scale? Also, implementing that kind of energy system could alter the Earth's climate, the research suggests. Still, there's an overarching message in the study: Open oceans boast a huge potential for ... […]

  • Energy for the Planet: Open Ocean Wind Turbines Could Provide Enough Electricity to Power the Entire World
    on October 10, 2017 at 11:13 am

    There is so much magnificence in the ocean, including, apparently, untapped kinetic energy. It turns out that wind turbines over open ocean could generate three times as much power—that's right: three times as much—as placing them on land. This was ... […]

  • Open-Ocean Wind Farms Could Meet Current Global Energy Demand
    on October 10, 2017 at 10:59 am

    Ocean-based wind farms in the North Atlantic could generate enough power in winter to meet all of humanity’s current energy needs, a study published Monday found. The research, which explains why wind speeds are faster in the ocean, is a welcome boost to ... […]

  • Vast and efficient ocean wind farms 'could power human civilisation'
    on October 10, 2017 at 9:01 am

    Vast wind farms in the North Atlantic could tap enough power to power the entirety of human civilisation, researchers have claimed. Open ocean sites thousands of kilometres from Europe or North America could hit far higher efficiency than equivalent land ... […]

  • Wind farms in ocean could power the world: study
    on October 10, 2017 at 12:37 am

    MIAMI - Wind farms in the open ocean can generate far more renewable energy than those on land, possibly enough to power the whole world, says a US study. Researchers at the Carnegie Institution for Science found that higher wind speeds over the open seas ... […]

  • Scientists Say The Future Of Wind Energy Might Be On The Open Ocean
    on October 9, 2017 at 7:50 pm

    they argue that wind turbines over the North Atlantic could generate three times as much energy, leading to "civilization scale power." And to achieve this, all we'd need to do is create turbines that can withstand extreme open ocean conditions — and ... […]

  • Floating Wind Turbines on the High Seas Could Produce Massive Amounts of Power
    on October 9, 2017 at 12:00 pm

    What Possner and climate scientist Ken Caldeira reveal today is that the atmosphere is more generous out in the open ocean. There, they estimate, wind farms could be packed more tightly, because energy should flow down from above the boundary layer to ... […]

  • Open-ocean wind farms
    on October 9, 2017 at 1:00 am

    A study suggests that wind farms in open ocean environments may be able to sustain higher electricity generation rates than wind farms on land. Wind turbines on wind farms continuously convert kinetic energy from surface winds into electricity. By removing ... […]

via Google News and Bing News

Other Interesting Posts

Leave a Reply

%d bloggers like this: