Wind

Strong, light blades a boost for wind energy?

Publication: msnbc.com   Date: August, 30, 2011   View Article

Bigger is better … when it’s also lighter and stronger, goes the thinking of engineers and materials scientists designing the next generation of blades to wring energy from the wind.

Bigger blades can get more energy from the wind, but this advantage is lost if the blade is also heavier, since more wind is needed to turn the rotor. In addition, the more the blade flexes in the wind, the more potential energy is lost.

Eight hurdles on the track to a green energy future

Publication: MSNBC.com   Date: September 21, 2010   View Article

The green energy future envisions a technological road that leads to an infinite supply of power, independence from potentially hostile nations and an atmosphere cleared of the excess heat-trapping gases that are blamed for warming the planet. The track to this future, however, is full of technological and policy hurdles. Learn how eight of the biggest hurdles might be cleared.

Ten hot green-energy trends to watch

Publication: MSNBC.com   Date: September 14, 2010   View Article

From the rollout of sexy new electric vehicles to technologies that convert turkey poop to electricity, green energy is the source of constant hype and buzz. What do green-energy experts have on their radar screen?

To find out, we checked in with Dan Kammen, director of the Renewable and Appropriate Energy Laboratory at the University of California at Berkeley; and Ron Pernick, co-founder and managing director of Clean Edge, a research firm with offices in Oregon and California.

7 ways to generate and save energy at home

Publication: MSNBC.com   Date: November 17, 2009   View Article

Prepare for battle if you’re ready to pull away from the electricity grid and generate at least some of your energy at home.

“The first thing you do is make war on consumption,” said Richard Perez, the publisher of Home Power Magazine, which guides people through the transition to a life built around renewable energy. “In other words, analyze where you are using electricity and see where you can make it more efficient.”

Seven green energy hot spots

Publication: MSNBC.com   Date: September 15, 2009   View Article

Some experts believe innovation in green energy is poised to lift the global economy to new heights – and save the planet from a human-made climate catastrophe. If so, where does one head to get in on the action? Learn about seven hot spots with a lot of buzz.

The list is neither comprehensive nor ranked. As San Francisco-based GreenTech Media senior analyst Eric Wesoff put it, the green energy economy is going to require “a quilt of different technologies” developed across the country. No one region or energy supply will necessarily rule supreme.

Crazy green-energy ideas that just might work

Publication: MSNBC.com   Date: August 26, 2009   View Article

Fields of windmills spinning in the breeze and deserts covered with solar panels are familiar options for renewable energy. But they are far from the only technologies under consideration. Check out six other green energy ideas that are so wacky they just might work.

10 technologies on the ‘green’ frontier

Publication: MSNBC.com   Date: April 21, 2009   View Article

Technology helped humans blast off from Earth and circle the moon in the 1968, giving astronauts the chance to make an iconic image of planet Earth. Scientists and environmentalists are now hoping technology will help humans grounded on terra firma find harmony at home. Check out 10 technologies on the green frontier.

© 2008-2010 Collected Writings By John Roach