On Tue, 21 Jun 2005 16:33:36 -0400 Mitch Haley <[EMAIL PROTECTED]> wrote:
> David Brodbeck wrote: > > Yup, and if I remember right, the overall efficiency of sunlight -> PV > > panel -> electrolysis -> compressed hydrogen is only about 30%. The > > whole "hydrogen economy" idea is so easy to poke holes in I'm amazed > > anyone falls for it. > > Q: We've got PV panels over 30%? > > A: I just checked, there are designs with theoretical limits around 60%, > so I guess 30% isn't out of the question any more. Wow. > http://www.nrel.gov/ncpv_prm/adv_concepts.html ... using semiconductor quantum dots to slow the cooling of hot electrons could produce solar cells with enhanced conversion efficiencies having thermodynamics limits as high as 66%. Note the word "could". That's a mighty big qualifier. Craig
