Posted on 05/17/2011 9:36:31 AM PDT by dangerdoc
COLUMBIA, Mo. – Efficiency is a problem with today’s solar panels; they only collect about 20 percent of available light. Now, a University of Missouri engineer has developed a flexible solar sheet that captures more than 90 percent of available light, and he plans to make prototypes available to consumers within the next five years.
Patrick Pinhero, an associate professor in the MU Chemical Engineering Department, is developing a flexible solar sheet that captures more than 90 percent of available light. Today’s solar panels only collect 20 percent of available light. Patrick Pinhero, an associate professor in the MU Chemical Engineering Department, says energy generated using traditional photovoltaic (PV) methods of solar collection is inefficient and neglects much of the available solar electromagnetic (sunlight) spectrum. The device his team has developed – essentially a thin, moldable sheet of small antennas called nantenna – can harvest the heat from industrial processes and convert it into usable electricity. Their ambition is to extend this concept to a direct solar facing nantenna device capable of collecting solar irradiation in the near infrared and optical regions of the solar spectrum.
Working with his former team at the Idaho National Laboratory and Garrett Moddel, an electrical engineering professor at the University of Colorado, Pinhero and his team have now developed a way to extract electricity from the collected heat and sunlight using special high-speed electrical circuitry. This team also partners with Dennis Slafer of MicroContinuum, Inc., of Cambridge, Mass., to immediately port laboratory bench-scale technologies into manufacturable devices that can be inexpensively mass-produced.
“Our overall goal is to collect and utilize as much solar energy as is theoretically possible and bring it to the commercial market in an inexpensive package that is accessible to everyone,” Pinhero said. “If successful, this product will put us orders of magnitudes ahead of the current solar energy technologies we have available to us today.”
As part of a rollout plan, the team is securing funding from the U.S. Department of Energy and private investors. The second phase features an energy-harvesting device for existing industrial infrastructure, including heat-process factories and solar farms.
Within five years, the research team believes they will have a product that complements conventional PV solar panels. Because it’s a flexible film, Pinhero believes it could be incorporated into roof shingle products, or be custom-made to power vehicles.
Once the funding is secure, Pinhero envisions several commercial product spin-offs, including infrared (IR) detection. These include improved contraband-identifying products for airports and the military, optical computing, and infrared line-of-sight telecommunications.
You could fit about 4 square meters on a car which would take it about 40 miles per day without plugging it in.
And that power figure is based on the entire globe, most inhabited areas would recieve more solar energy.
I was trying to work out the numbers from an amature/rough guess-timate point of view. Thanks for the clarification of the numbers.
Now, of course, even if right, that presumes 90% efficiency and proper batteries to store energy from sunlight hours for use at other times, plus you'd want some kind of backup for prolonged overcast conditions.
Then there are places like our Northern border States, not to mention Alaska, where Winter daylight hours are short.
Perhaps it could power my flying car.
And being flexible means the potential for incorporating into sails to power the navigation equipment and otehr electrical devices for ocean voyages.
Now I just need a large sailing yacht...
Or incorporated into tents for disaster relief or military use.
In that case, I call double-BS, because the laws of thermodynamics put very strict limits on how much energy can be extracted from heat, which is a disorganized form of energy. Unless he is running at an enormously high temperature he can't get to 95% efficiency using a heat engine of any kind. And enormously high temperatures bring extreme engineering challenges that probably render such an engine impractical.
In fact, he'd be better off claiming to convert the light, since there is no theoretical limit on the conversion efficiency (up to 100% that is), because light, unlike heat, is an organized form of energy.
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