• 4 minutes US-backed coup in Venezuela not so smooth
  • 7 minutes Why Trump will win the wall fight
  • 11 minutes Oil imports by countries
  • 13 minutes Maduro Asks OPEC For Help Against U.S. Sanctions
  • 1 hour Climate Change: A Summer of Storms and Smog Is Coming
  • 35 mins Itt looks like natural gas may be at its lowest price ever.
  • 2 hours Venezuela: Nicolas Maduro closes border with Brazil
  • 5 hours Teens For Climate: Swedish Student Leader Wins EU Pledge To Spend Billions On Climate
  • 25 mins Tension On The Edge: Pakistan Urges U.N. To Intervene Over Kashmir Tension With India
  • 3 hours Amazon’s Exit Could Scare Off Tech Companies From New York
  • 17 hours students walk out of school in protest of climate change
  • 23 hours North Korea's Kim To Travel To Vietnam By Train, Summit At Government Guesthouse
  • 2 days Washington Eyes Crackdown On OPEC
  • 1 day Europe Adds Saudi Arabia to Dirty-Money Blacklist
  • 1 day Some Good News on Climate Change Maybe
  • 1 day America’s Shale Boom Keeps Rolling Even as Wildcatters Save Cash
An Underestimated Niche In Oil & Gas

An Underestimated Niche In Oil & Gas

Decommissioning obligations in the global…

Oil Prices Nearing Breakout Levels

Oil Prices Nearing Breakout Levels

The recent rally in oil…

DOE To Explore Offshore Heights With Onshore Construction Techniques

The U.S. Department of Energy (DOE) is investing $2 million to explore ways to build taller wind turbines that can access stronger and more consistent high-altitude winds.

What’s known as the Taller Hub Heights opportunity for federal funding will help wind farms in Iowa and Massachusetts get access to the stronger winds and, using longer rotor blades, reap more wind energy than they can today.

The two projects will help reduce the cost of harnessing wind energy and expand the number of regions where turbines can be successfully situated at relatively low cost, David Danielson, the assistant U.S. secretary for energy efficiency and renewable energy, said Sept. 18 in announcing the funding.

Related: Wind Power Finally Takes Hold In United States

Currently, the height of wind towers is limited by the constraints of logistics and transportation in moving the turbines’ components to their installation sites. As a result, onshore turbines installed in 2013 averaged 260 feet in height.

But the newer turbines to be installed for the grant recipients, Iowa State University and Keystone Towers of Massachusetts, will reach heights of nearly 400 feet. That’s the “hub height” of the turbine, measured from the ground to point at which the rotor blades are attached. If the blades describe a circle 100 meters (328 feet) in diameter, the tip of each rotor will reach 558 feet above ground.

The taller the turbines and the bigger the rotors, the more wind they can catch – as much as 7.5 megawatts or even up to 10 megawatts, far outpacing U.S. onshore turbines built in 2013, which  capture less than 2 megawatts at best.

These taller turbines already have been used in offshore wind farms and can capture between seven and 10 megawatts of wind energy. But their construction, while suitable for offshore applications, doesn’t translate to onshore construction. Besides, building towers strong enough to support heavy turbines can be expensive.

Related: U.S. Warms To Clean Energy

But the two projects being funded by the DOE are exploring novel ways to make construction and shipping more efficient and less expensive. Massachusetts’ Keystone Towers, for example, is considering applying a spiral welding technique that could lead to on-site construction of tubular steel towers that are 40 percent lighter than the current design. That would save on shipping and materials cost.

Meanwhile, Iowa State is focusing on a modular design made of hexagonal concrete and steel that would allow the taller towers to be shipped in pieces and assembled on-site.

“Through innovative construction processes that will cost-effectively manufacture taller wind turbine towers, these projects in Iowa and Massachusetts will help reduce the cost of wind energy and expand the geographic areas where wind turbines can successfully be deployed in the U.S.,” the DOE said in a news statement.

By Andy Tully of Oilprice.com

More Top Reads From Oilprice.com:



Join the discussion | Back to homepage

Leave a comment

Leave a comment

Oilprice - The No. 1 Source for Oil & Energy News