2013年2月6日星期三

The solar power conversion device under development

The size of the gap is critical because it creates an ultra-fast tunnel junction between the rectenna's two electrodes, allowing a maximum transfer of electricity. The nanosized gap gives energized electrons on the rectenna just enough time to tunnel to the opposite electrode before their electrical current reverses and they try to go back. The triangular tip of the rectenna makes it hard for the electrons to reverse direction, thus capturing the energy and rectifying it to a unidirectional current. Impressively, the rectennas, because of their incredibly small and fast tunnel diodes, are capable of converting solar radiation in the infrared region through the extremely fast and short wavelengths of visible light – something that has never been accomplished before. Silicon solar panels, by comparison, have a single band gap which, loosely speaking, allows the panel to convert electromagnetic radiation efficiently at only one small portion of the solar spectrum. The rectenna devices don't rely on a band gap and may be tuned to harvest light over the whole solar spectrum, creating maximum efficiency. The federal government has taken notice of Willis's work. Willis and a team of scientists from Penn State Altoona along with SciTech Associates Holdings Inc., a private research and development company based in State College, Pa.,From start to finish our team of experts will be able to take you through the entire process of LED bulb, buying and installing the best energy efficient LED Bulbs for your purposes. recently received a $650,000, three-year grant from the National Science Foundation to fabricate rectennas and search for ways to maximize their performance. "This new technology could get us over the hump and make solar energy cost-competitive with fossil fuels," says Willis. "This is brand new technology, a whole new train of thought.And then the materials are rebounded from the Quarry plant liner to the area where the hammers effects for being recrushed.The materials from large to small all to be crushed at the impact chamber repeatedly.One of the main problems with traditional filament Solar light is that they wasted a lot of their energy in producing heat rather than light, which would significantly increase the cost of lighting a building." The Penn State Altoona research team – which has been exploring the theoretical side of rectennas for more than a decade – is led by physics professor Darin Zimmerman, with fellow physics professors Gary Weisel and Brock Weiss serving as co-investigators. The collaboration also includes Penn State emeritus physics professors Paul Cutler and Nicholas Miskovsky, who are principal members of Scitech Associates.With Solar Lights you would be able to see where you are going and you can enjoy the nighttime beauty of your Solar Laptop charger. Solar Garden Lights with super bright LEDs do not generate the heat of conventional bulbs. "The solar power conversion device under development by this collaboration of two universities and an industry subcontractor has the potential to revolutionize green solar power technology by increasing efficiencies, reducing costs, and providing new economic opportunities,"Zimmerman says."Until the advent of selective atomic layer deposition (ALD),Sand washing machine it has not been possible to fabricate practical and reproducible rectenna arrays that can harness solar energy from the infrared through the visible," says Zimmerman.

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