Very cheap solar power
in [Physics]
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From: Transition Zone on 18 Feb 2010 12:27 On Feb 18, 12:12 pm, j...(a)specsol.spam.sux.com wrote: > In sci.physics hab...(a)anony.net wrote: > > What happens when you put iron chains in water in sunlight? > > They rust away. But as a result, what substance(s) are created?
From: jimp on 18 Feb 2010 12:39 In sci.physics Transition Zone <mogulah(a)hotmail.com> wrote: > On Feb 18, 12:12 pm, j...(a)specsol.spam.sux.com wrote: >> In sci.physics hab...(a)anony.net wrote: >> > What happens when you put iron chains in water in sunlight? >> >> They rust away. > > But as a result, what substance(s) are created? Depending on how good your pool filter is, either a pool filled with rusty water or a pool filter clogged with rust. Also likely a bit of blood from foot injuries because of the rusty chains. -- Jim Pennino Remove .spam.sux to reply.
From: habshi on 19 Feb 2010 18:38 Why are pool walls white and not black then?
From: jimp on 19 Feb 2010 19:05 In sci.physics habshi(a)anony.net wrote: > Why are pool walls white and not black then? Around here almost all of them are blue. The people that own pools are for the most part not anal-retentive idiots getting their science out of comic books like you do. The esthetics of a pool are important to most people. A black pool would be butt ugly. Further, whether or not you would want the Sun to warm the pool, or even warm the pool at all, depends a lot on where the pool is located. You are still an idiot. -- Jim Pennino Remove .spam.sux to reply.
From: habshi on 19 Feb 2010 19:29
excerpt http://www1.voanews.com/english/news/science-technology/New-Way-of-Making-Solar-Cells-Promises-Cheaper-Power--84775367.html So what that means is, in terms of cost, is you can use 100 times less silicon. And that's potentially very significant." But the silicon is what converts light into electricity, so you might think using so much less silicon would reduce the electrical output, but Atwater says that's not the case. "The light comes in and is both directly absorbed by the wires, and some of the light bounces around in between the wires. And that bouncing around or multiple scattering in between the wires results in dramatically enhanced absorption," Atwater explained. "In fact, the absorption enhancement that we see is in the range of 20 to 50 times the single-pass absorbance." Atwater and his colleagues have made prototypes of the design in the lab, and the product doesn't look like the typical solar panels you might see on top of a building. "What we do with our wire arrays is grow them on a supporting substrate, and we peel them off inside a plastic sheet, so that the material has exactly the optical and electrical properties of a silicon wafer, but instead it basically has the mechanical properties of a flexible plastic sheet." That flexibility opens the door to potential new applications, such as what Atwater calls "integrated photovoltaics." For example, the solar cell could be built into roofing material, saving money on installation. Other ideas for new uses come from the physical form of Atwater's novel design. "Well, one of the things that's interesting about these flexible sheets is that they can be curved, so you could imagine putting them in unconventional forms, like on the surface of a vehicle or something like that, where you don't have a flat surface." The Caltech professor says he's optimistic about commercializing his new solar cell design because the manufacturing process should not require development of any new technologies. And he stresses that it should reduce the cost of generating power from the sun. |