Fuel from only water and sunlight? Talk about an endless supply. That's what researchers at the U.S. Department of Energy's National Renewable Energy Laboratory are counting on. Senior Scientist Dr. John Turner and postdoctoral fellow Dr. Oscar Khaselev developed an all-in-one device using an advanced semiconductor material. The instrument splits water into hydrogen and oxygen, converting up to 12% of available sunlight into hydrogen. Current systems link photovoltaic cells that generate electricity with an electrolyser. Because they lose efficiency by transferring electricity to the electrolyser, they only convert about 4 to 5% of the available sunlight into hydrogen. The potential of hydrogen is enormous, says Turner. Internal combustion engines can run with pure hydrogen or hydrogen blended with natural gas, producing fewer emissions. Hydrogen fuel cells, with no emissions, also can power vehicles and provide heat and electricity. When hydrogen is used as an energy resource, it generates no emissions other than water, which can be used to make more hydrogen. The Department of Energy's Hydrogen Program hopes to replace 2 to 4 quads of conventional energy with hydrogen by 2010 and 10 quads a year by 2030. A quad equals the amount of energy consumed by 1 million households in the U.S. E-mail: firstname.lastname@example.org.
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
These are the toys that inspired budding engineers to try out sublime designs, create miniature structures, and experiment with bizarre contraptions using sets that could be torn down and reconstructed over and over.
PowerStream is deploying the microgrid at its headquarters to demonstrate how people can generate and distribute their own energy and make their homes and businesses more sustainable through renewables.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.