DBK [RE-wrenches]

[Matt Tritt]

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So, having said that, does the advertising sound like "truth", or un-truth?

To me it still sounds like a bunch of carefully worded crap-ola.

Matt T

Peter Parrish wrote:

>Let's be careful here. 
>
>I am a physicist and I have to tell you that light exhibits both a
>corpuscular nature (the photon) and a wave nature. This is one of the
>fundamental consequences of quantum mechanics.
>
>Having said that, the radiation from the Sun that reaches the earth's
>surface can be characterized as a "spectrum" (roughly speaking a curve of
>flux over wavelength). 
>
>I am not sure what the total flux (watts per square meter) is over all
>wavelengths, but the sun's spectrum peaks in the visible (and less
>consequently in the ultraviolet and less in the infrared.
>
>Single crystal or polycrystalline silicon solar cells have their peak
>efficiency in the infrared at 1.1 microns, so much of the sun's spectrum is
>not utilized. Multiple junction solar cells are tuned to work at different
>wavelengths to address this problem.
>
>What we are talking about here is factors of five or ten (20% efficiency or
>10% efficiency) not factors of 100.  
>
>As far as electrons are concerned, the ones that can produce net (i.e.
>useful external) current are created by photons that get into the
>semiconductor junction. That is, they are "born in the junction". Whether or
>not, once born, they make it to the external terminals of the solar sell and
>become useful current, it another matter and part of the efficiency
>equation.
>
>I hope this helps to clarify some of the issues.
>
>- Peter Parrish
>
>-----Original Message-----
>From: Marco Mangelsdorf [mailto:marco at pvthawaii.com] 
>Sent: Saturday, June 10, 2006 10:18 AM
>To: RE-wrenches at topica.com
>Subject: DBK [RE-wrenches]
>
>
>
>Check this out from the DBK website:
>
> 
>
>ABOUT THE JIL-3000
>
> The current pictures reflect the prototype version of the new model
>JIL-3000. In the manufactured version all cells will be recessed and the
>surface will be smooth. 
>
> Question: How do you get so much power from a solar panel?
>
> Answer: We have overcome three major obstacles of typical solar panel on
>the market: 1) photons which have too short a wavelength bounce off and are
>not absorbed; 2) those with too long a wavelength go thru the panel and end
>up as heat; 3) and lastly electrons that sit on the skin and fail to go thru
>the junction. 
>
> 
>
>Now, I'm not a physicist, but I didn't know that photons possessed
>wavelength.Has the nature of light changed that much since I was in college?
>
> 
>
> 
>
>Marco Mangelsdorf
>
>ProVision Technologies, Inc.
>
>Electrical Contractor C-26351
>
>69 Railroad Avenue, A-7
>
>Hilo, Hawai'i 96720
>
>(808) 969-3281
>
>(808) 934-7462 fax
>
> <http://www.provisiontechnologies.com> www.provisiontechnologies.com
>
> 
>
>
>[Non-text portions of this message have been removed]
>
>
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>
>  
>


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