Solar panel efficency
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From: Dirk Bruere at NeoPax on 12 Jun 2010 23:05 On 13/06/2010 03:27, Bill Bowden wrote: > On Jun 12, 1:03 pm, "k...(a)att.bizzzzzzzzzzzz" > <k...(a)att.bizzzzzzzzzzzz> wrote: >> On Sat, 12 Jun 2010 20:44:09 +0100, Dirk Bruere at NeoPax >> >> >> >> <dirk.bru...(a)gmail.com> wrote: >>> On 12/06/2010 20:41, Archimedes' Lever wrote: >>>> On Sat, 12 Jun 2010 20:30:34 +0100, Dirk Bruere at NeoPax >>>> <dirk.bru...(a)gmail.com> wrote: >> >>>>>> Cadmium! Can they sell these in Europe, ROHS and all? >> >>>>> They probably have a "do not lick" label for litigious US tourists. >> >>>> Uh... RoHs is a euro thing. >> >>>> The US banned Cadmium in the industry years ago. More proof that the >>>> whole rohs thing was a huge waste of money for the entire world. A hit >>>> this industry did not need. >> >>>> And there are exemptions, even for Cadmium, Mercury, and Lead. They >>>> are just not anywhere where contact is an imminent worry. >> >>> Well, I do not mourn NiCd batteries. >> >> NiCd has its place. NiMH certainly hasn't held up its promise. >> >>> I'll be happy when lead acid goes the same way. >> >> Lead-Acid (and SLA) has its place too. No one has come up with a replacement >> for either one. > > How about Li-ion? is that bad or just too expensive? They don't seem > to have much self discharge, and absorb almost all the energy used to > charge them. > > -Bill Li-ion, or Li Polymer, are rather expensive. I suspect that they will become even more expensive if they are widely adopted in electric cars since sources of cheap Li are very finite. That's one reason I'de like to see some progress with (say) Aluminium-Air batteries. http://en.wikipedia.org/wiki/Aluminium_battery or recharchables -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: krw on 12 Jun 2010 23:50 On Sat, 12 Jun 2010 19:27:19 -0700 (PDT), Bill Bowden <wrongaddress(a)att.net> wrote: >On Jun 12, 1:03�pm, "k...(a)att.bizzzzzzzzzzzz" ><k...(a)att.bizzzzzzzzzzzz> wrote: >> On Sat, 12 Jun 2010 20:44:09 +0100, Dirk Bruere at NeoPax >> >> >> >> <dirk.bru...(a)gmail.com> wrote: >> >On 12/06/2010 20:41, Archimedes' Lever wrote: >> >> On Sat, 12 Jun 2010 20:30:34 +0100, Dirk Bruere at NeoPax >> >> <dirk.bru...(a)gmail.com> �wrote: >> >> >>>> Cadmium! Can they sell these in Europe, ROHS and all? >> >> >>> They probably have a "do not lick" label for litigious US tourists. >> >> >> � �Uh... RoHs is a euro thing. >> >> >> � �The US banned Cadmium in the industry years ago. �More proof that the >> >> whole rohs thing was a huge waste of money for the entire world. �A hit >> >> this industry did not need. >> >> >> � �And there are exemptions, even for Cadmium, Mercury, and Lead. �They >> >> are just not anywhere where contact is an imminent worry. >> >> >Well, I do not mourn NiCd batteries. >> >> NiCd has its place. �NiMH certainly hasn't held up its promise. � >> >> >I'll be happy when lead acid goes the same way. >> >> Lead-Acid (and SLA) has its place too. �No one has come up with a replacement >> for either one. > >How about Li-ion? is that bad or just too expensive? They don't seem >to have much self discharge, and absorb almost all the energy used to >charge them. Too expensive and fragile for a lot of applications. They require constant monitoring just to keep them from catching fire. Sometimes it even works. All battery technologies have their weak points. Overlap is needed so it's unlikely that any are going away, barring government intervention.
From: Paul Keinanen on 13 Jun 2010 01:41 On Sat, 12 Jun 2010 20:44:09 +0100, Dirk Bruere at NeoPax <dirk.bruere(a)gmail.com> wrote: >Well, I do not mourn NiCd batteries. It is hard to find other types with as low internal resistance. This is critical in applications using high peak current during short periods at a time, without too much voltage drop. An accumulator with several times the nominal capacity compared to the NiCd is useless, if it can not supply an output voltage higher than the drop out voltage of the device during peak demand.
From: JosephKK on 13 Jun 2010 13:09 On Sun, 13 Jun 2010 01:13:24 +0100, Dirk Bruere at NeoPax <dirk.bruere(a)gmail.com> wrote: >On 12/06/2010 23:43, Archimedes' Lever wrote: >> On Sat, 12 Jun 2010 15:20:49 -0700, John Larkin >> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >> >>> On Sat, 12 Jun 2010 14:44:13 -0700, Archimedes' Lever >>> <OneBigLever(a)InfiniteSeries.Org> wrote: >>> >>>> On Sat, 12 Jun 2010 14:22:39 -0700, John Larkin >>>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>>> >>>>> There was/is concern over whether LEDs and microwave fets are allowed, >>>>> what with the arsenic in GaAs. >>>> >>>> >>>> That is just silly. It is a crystal and is tightly bound. >>> >>> If you read the wording of the ROHS rules, that doesn't matter. It >>> also doesn't matter how little GaAs is in a product. >>> >>> John >> >> >> So, in other words, they are *all* 'arseholes'. >> >> If that is the case, they need to all ban themselves. >> >> I should do stand up. > >Don't worry - the use of all these exotic metals are only a stopgap >until we can do it right with quantum dots etc using carbon, silicon etc We may not get there if there is no end of the anti-technology shilly-shallying.
From: Dirk Bruere at NeoPax on 13 Jun 2010 13:35
On 13/06/2010 18:09, JosephKK wrote: > On Sun, 13 Jun 2010 01:13:24 +0100, Dirk Bruere at NeoPax > <dirk.bruere(a)gmail.com> wrote: > >> On 12/06/2010 23:43, Archimedes' Lever wrote: >>> On Sat, 12 Jun 2010 15:20:49 -0700, John Larkin >>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>> >>>> On Sat, 12 Jun 2010 14:44:13 -0700, Archimedes' Lever >>>> <OneBigLever(a)InfiniteSeries.Org> wrote: >>>> >>>>> On Sat, 12 Jun 2010 14:22:39 -0700, John Larkin >>>>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>>>> >>>>>> There was/is concern over whether LEDs and microwave fets are allowed, >>>>>> what with the arsenic in GaAs. >>>>> >>>>> >>>>> That is just silly. It is a crystal and is tightly bound. >>>> >>>> If you read the wording of the ROHS rules, that doesn't matter. It >>>> also doesn't matter how little GaAs is in a product. >>>> >>>> John >>> >>> >>> So, in other words, they are *all* 'arseholes'. >>> >>> If that is the case, they need to all ban themselves. >>> >>> I should do stand up. >> >> Don't worry - the use of all these exotic metals are only a stopgap >> until we can do it right with quantum dots etc using carbon, silicon etc > > We may not get there if there is no end of the anti-technology > shilly-shallying. That just means it will be done by China, India etc. Same way that the next people on the moon, and probably Mars, will be Chinese not Americans. -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.blogtalkradio.com/onetribe - Occult Talk Show |