Solar cell
in [Design]
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From: Jan Panteltje on 17 Apr 2010 12:41 On a sunny day (Sat, 17 Apr 2010 08:57:14 -0700) it happened Don Lancaster <don(a)tinaja.com> wrote in <82u42oFov7U2(a)mid.individual.net>: >On 4/17/2010 1:34 AM, eryer wrote: >> Hi, >> I want to realize (for hobby) a battery charger using solar cell. I've >> found this sensor >> http://www.clare.com/Products/SolarCell.htm >> Its output voltage is high and can be used without step-up transformer >> (like any typical solar cell). So, i can use >> * a typical solar cell (with millivolt output voltage) and a step-up >> transformer >> * this sensor >> For you, what is the best (performance) solution? > > >There is NO best solution. > >All of photovoltaics is an outright scam to steal state and federal funds. > >Not one net watthour of pv energy has EVER been produced! Bad day?
From: Phil Hobbs on 17 Apr 2010 13:20 On 4/17/2010 11:57 AM, Don Lancaster wrote: > On 4/17/2010 1:34 AM, eryer wrote: >> Hi, >> I want to realize (for hobby) a battery charger using solar cell. I've >> found this sensor >> http://www.clare.com/Products/SolarCell.htm >> Its output voltage is high and can be used without step-up transformer >> (like any typical solar cell). So, i can use >> * a typical solar cell (with millivolt output voltage) and a step-up >> transformer >> * this sensor >> For you, what is the best (performance) solution? > > > There is NO best solution. > > All of photovoltaics is an outright scam to steal state and federal funds. > > Not one net watthour of pv energy has EVER been produced! > > See <http://www.tinaja.com/glib/pvlect2.pdf> for a detailed analysis. > > > > Don, you're out of date: a pal of mine at IBM is doing a 30 kW peak system for the Saudis, using very low cost tracking technology and a new type of Fresnel lens concentrators that run at above 2000 suns. (The trick is cooling them, but he's also the guy that invented the liquid metal thermal interface that Apple has used on their higher end machines.) The silicon cost is trivial due to the high concentration, and the other costs appear quite manageable. He's getting 250W peak from a 4x7 foot collector on the first try, and expects to get 325W once the new Fresnel lenses come in. The cost is mostly in the fabrication, not the energy required to make the apparatus. Flat plate silicon collectors are a crock, I agree. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal ElectroOptical Innovations 55 Orchard Rd Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net
From: hamilton on 17 Apr 2010 13:25 On 4/17/2010 10:41 AM, Jan Panteltje wrote: > On a sunny day (Sat, 17 Apr 2010 08:57:14 -0700) it happened Don Lancaster > <don(a)tinaja.com> wrote in<82u42oFov7U2(a)mid.individual.net>: >> There is NO best solution. >> >> All of photovoltaics is an outright scam to steal state and federal funds. >> >> Not one net watthour of pv energy has EVER been produced! > > Bad day? Ok, the link now works. Dons argument is what the non-green types have been saying for years. It costs too much to develop and manufacture green technologies then to stick to the 'tried-n-true' fossil fuels. He does have a point, the cost to early adapters will never be paid back. But, I think we need to start somewhere, and PV solar needs to have money to continue to develop and innovate. As time passes and science has the money to continue, they will get there. ( maybe not in my lifetime, but they will get there ) hamilton
From: Dirk Bruere at NeoPax on 17 Apr 2010 14:23 On 17/04/2010 18:25, hamilton wrote: > On 4/17/2010 10:41 AM, Jan Panteltje wrote: >> On a sunny day (Sat, 17 Apr 2010 08:57:14 -0700) it happened Don >> Lancaster >> <don(a)tinaja.com> wrote in<82u42oFov7U2(a)mid.individual.net>: >>> There is NO best solution. >>> >>> All of photovoltaics is an outright scam to steal state and federal >>> funds. >>> >>> Not one net watthour of pv energy has EVER been produced! >> >> Bad day? > Ok, the link now works. > > Dons argument is what the non-green types have been saying for years. > > It costs too much to develop and manufacture green technologies then to > stick to the 'tried-n-true' fossil fuels. > > He does have a point, the cost to early adapters will never be paid back. > > But, I think we need to start somewhere, and PV solar needs to have > money to continue to develop and innovate. > > As time passes and science has the money to continue, they will get > there. ( maybe not in my lifetime, but they will get there ) > > > hamilton > Current energy payback times: http://www.nrel.gov/docs/fy04osti/35489.pdf Payback times currently vary between 1 and 4 years. -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: Jim Thompson on 17 Apr 2010 14:52
On Sat, 17 Apr 2010 13:20:26 -0400, Phil Hobbs <pcdhSpamMeSenseless(a)electrooptical.net> wrote: >On 4/17/2010 11:57 AM, Don Lancaster wrote: [snip] >> >> All of photovoltaics is an outright scam to steal state and federal funds. >> >> Not one net watthour of pv energy has EVER been produced! >> >> See <http://www.tinaja.com/glib/pvlect2.pdf> for a detailed analysis. >> >> >> >> >Don, you're out of date: a pal of mine at IBM is doing a 30 kW peak >system for the Saudis, using very low cost tracking technology and a new >type of Fresnel lens concentrators that run at above 2000 suns. (The >trick is cooling them, but he's also the guy that invented the liquid >metal thermal interface that Apple has used on their higher end machines.) > >The silicon cost is trivial due to the high concentration, and the other >costs appear quite manageable. He's getting 250W peak from a 4x7 foot >collector on the first try, and expects to get 325W once the new Fresnel >lenses come in. The cost is mostly in the fabrication, not the energy >required to make the apparatus. > [snip] > >Phil Hobbs Man! That's so-o-o-o efficient :-D ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | The only thing bipartisan in this country is hypocrisy |