Subscribe to our free daily newsletters
  Energy News  




Subscribe to our free daily newsletters



ENERGY TECH
An Answer To Green Energy Could Be In The Air

NASA aerospace engineer Mark Moore in his office. Moore is part of the first federally-funded research effort to examine airborne wind capturing platforms. He's developing methods the government can use to fairly evaluate competing ideas on how to capture and use wind energy efficiently. Credit: NASA/Sean Smith
by Jim Hodges
Hampton VA (SPX) Dec 14, 2010
In Mark Moore's world, long nanotubes reach into the clouds, serving at once to tether a turbine-vehicle flying at 2,000 feet, or 10,000 feet, or 30,000 feet (610, 3,050 and 9,150 meters); and also to conduct the power that vehicle can harvest from the wind back to Earth.

Aloft might be a funnel-shaped blimp with a turbine at its back; or a balloon with vanes that rotate; a truss-braced wing; a parachute; a kite. Any and all of them are ideas being considered by nascent renewable energy industry that is flexing its imagination.

Moore, who works as an aerospace engineer, centering his focus on advance concepts in the Systems Analysis Branch at NASA's Langley Research Center, is using a $100,000 grant from the federal government to research what it will take to judge the value of any of those ideas.

"It's the first federally funded research effort to look at airborne wind capturing platforms," Moore said. "We're trying to create a level playing field of understanding, where all of the concepts and approaches can be compared - what's similar about them? What's different about them, and how can you compare them?"

He likens the development of wind-borne energy to flight itself, adding that "this is like being back in 1903. Everybody's got a dog to show. Everybody's got a different way of doing it?"

But the Wright Brothers didn't have to deal with a crowded sky and the laws regulating it when they took off at Kitty Hawk. When they invented the airplane, they also created competition for airspace that makes creating air-borne power generation much more difficult.

"Airspace is a commodity," Moore said. "You have to be able to use airspace without disrupting it for other players. Smaller aircraft are still going to need to fly around. Larger airplanes, you can't expect them to fly around every wind turbine that has a two-mile radius as a protected flight zone."

It's another issue in considering air-borne power generation, which Moore hastens to say it not THE answer to clean energy but deserves consideration in a mix that includes solar power, ground-based wind turbines, algae and the other solutions both realistic and exotic that are being worked upon by scientists and engineers.

None have approached the cost of fossil fuel energy for thrift, but Moore argues that cost takes on a new dimension when all of its factors are considered, including the amount of land used in generating that power and its impact upon the atmosphere.

Tethers for airborne wind generation assets don't require a lot of ground space, nor are they labor intensive. And they don't pollute.

"They could stay up a year, then come down for a maintenance check and then go back up," Moore said. "Or they could be reeled in in case of a storm. Or one operator could watch over 100 of these."

Wind power is nothing new. Wind turbine farms have dotted the landscape for more than a generation. So why is this different?

"At 2,000 feet (610 m), there is two to three times the wind velocity compared to ground level," Moore said. "The power goes up with the cube of that wind velocity, so it's eight to 27 times the power production just by getting 2,000 feet (610 m) up, and the wind velocity is more consistent."

Send turbines farther aloft, into the 150 mph (240 kph) jet stream at 30,000 feet (9,150 m), and "instead of 500 watts per meter (for ground-based wind turbines), you're talking about 20,000, 40,000 watts per square meter," Moore said. "That's very high energy density and potentially lower cost wind energy because of the 50-plus fold increase in energy density."

So why isn't it being done? Or at least, why isn't it being researched more expansively?

One answer involves the vehicle to be flown. Another involves where to fly it.

"All you have right now are small companies doing the research, and all you can expect of them is to focus on one little piece," Moore said. "They have enough trouble just analyzing their concept without worrying about geography, about 'where should I mount these so that the wind is optimal?' "

The ultimate answer could be the federal government itself.

"In my mind, it's crazy that there isn't federal investment in this area, because the questions are just too great for small companies to answer," Moore said.

It's one of the reasons he has undertaken the wind-power study, which actually, he maintains, should be two studies. One involves the technology and geography. The other involves the interaction between those elements and other competitors for airspace.

That means dealing with current Federal Aviation Administration regulations and with those that might be necessary to accommodate an airspace that includes manned aircraft, the unmanned aircraft in the future, plus wind-borne energy turbines.

But first things first.

"It's important to understand the concept without regulatory constraints because it lets decision-makers and investors understand the topology of the solution space," Moore said. "We don't want to just look at the problem with regulatory blinders on, but we don't just look at it with no blinders on, either. We have to look at it both ways."

He offers another option that can help the FAA in its decision-making.

"Offshore deployment of these airborne systems probably makes the most sense in terms of both airspace and land use, because there is little to no demand for low altitude flight over oceans 12 miles (19 to 20 km) offshore," Moore said.

"Also, unlike ground-based turbines, there is almost no additional cost for airborne systems offshore because huge platforms are not required to support the structure or resist large tower bending moments.

"NASA Wallops could have an important role as an airborne wind testing center with access to offshore wind profiles in controlled airspace."

What all this has to do with NASA goes beyond the agency's commitment to help the nation with clean energy solutions. It also involves some of the core capabilities of the agency in aeronautics, composite materials and air space management.

"We've shown in the past that NASA's expertise can help broker and bring an understanding to the FAA as to how these technologies can map into constructive purposes," said Moore, who has met with wind power energy industry leaders, as well as officials from the National Renewable Energy Laboratory and Department of Energy in undergoing this project.

"They welcome this study because they've never dealt with flying systems and NASA has," Moore said. "You can't come up with advanced concepts until you understand the requirements well, and frankly, I don't think anybody understands the requirements well."

It's why he's undertaking the project: to bring a sense of what's going to be necessary to harvest power from the wind.



Share This Article With Planet Earth
del.icio.usdel.icio.us DiggDigg RedditReddit
YahooMyWebYahooMyWeb GoogleGoogle FacebookFacebook



Related Links
Langley Research Center
Powering The World in the 21st Century at Energy-Daily.com



Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News


ENERGY TECH
Earthshaking Possibilities May Limit Underground Storage Of CO2
Stanford CA (SPX) Dec 14, 2010
Storing massive amounts of carbon dioxide underground in an effort to combat global warming may not be easy to do because of the potential for triggering small- to moderate-sized earthquakes, according to Stanford geophysicist Mark Zoback. While those earthquakes are unlikely to be big enough to hurt people or property, they could still cause serious problems for the reservoirs containing ... read more







ENERGY TECH
Who Uses The Most Electricity In Germany

Less Than They Are Worth

How Can Urban Areas Efficiently Save Energy

Protest halts Dutch power station project

ENERGY TECH
Hundreds clash over Taiwan petrochemical project

China looks to Argentina for oil

An Answer To Green Energy Could Be In The Air

Assessing The Environmental Effects Of Tidal Turbines

ENERGY TECH
Massive offshore wind proposed for R.I.

Repair And Inspection Services For The Expanding Wind Power Industry

Vestas Selects Broadwind Towers For Glacier Hills Wind Project

Optimizing Large Wind Farms

ENERGY TECH
Analysts Predict PV Installations To Double In 2011

NRG Energy Expands Into New Mexico With Roadrunner Solar Project

Cupertino Electric Completes Port Of Los Angeles PV System

GSLO Signs LOI With Xiamen Solar Electronics For Volt Technology

ENERGY TECH
Russia, Mongolia set terms for uranium mining venture

Mitsubishi to produce nuclear fuel in US with AREVA

Areva head opposes new capital increase

Kuwait boosts stake in French nuclear giant Areva

ENERGY TECH
Review Highlights Knowledge Gaps Surrounding Biofuels And Land Use Change

Greenbelt Resources Conducts First Beverage Waste-to-Ethanol Conversion Study

Volvo Group Contributes To Carbon-Neutral Airports

Opcon Improves Energy Efficiency In Bioenergy Plant For Leading Imtech

ENERGY TECH
China Builds Theme Park In Spaceport

Tiangong Space Station Plans Progessing

China-Made Satellite Keeps Remote Areas In Venezuela Connected

Optis Software To Optimize Chinese Satellite Design

ENERGY TECH
US southwest could see 60-year drought: study

In Cancun climate talks, India enjoys place in sun

Nations set up global climate fund

Climate talks agree to pay to protect forests


The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement