Solar Impulse now fixed but waiting on weather

A solar-powered plane that got stuck in Japan during an attempt to fly around the world is fixed and ready to go—as soon as the weather gets better, a spokeswoman said Thursday.

Shifting winds: An early warning for reduced energy

The Rocky Mountains certainly aren't known for their mild winters. But in contrast to the upper Midwest, which seems to exist in a perpetually frozen state from November through March, the plains just east of the Rockies ...

Wind farms perform best when the sun is out

When set up in groups, wind turbines in the front rows cast a wind shadow on those behind them, lowering their performance. These effects dissipate fastest under convective conditions, say EPFL researchers in a recent publication.

Boeing 737 factory to move to clean energy

Boeing said Tuesday it plans to buy renewable energy credits to replace fossil-fuel power at the factory in Washington state where it assembles its 737 commercial airplanes.

Spanish island to be fully powered by wind, water

The smallest and least known of Spain's Canary Islands, El Hierro, is making a splash by becoming the first island in the world fully energy self-sufficient through combined water and wind power.

Wind energy: On the grid, off the checkerboard

As wind farms grow in importance across the globe as sources of clean, renewable energy, one key consideration in their construction is their physical design—spacing and orienting individual turbines to maximize their efficiency ...

page 8 from 40