Solar should NOT be confused with the so-called hydrogen economy.
On 6/21/05, David Brodbeck <[EMAIL PROTECTED]> wrote:
> [EMAIL PROTECTED] wrote:
> > The problem with sunlight is that the power density at the surface of
> > the earth is simply too low for most modern energy uses. I don't
> > remember the figures now, but read about studies that looked at the
> > power density in watts per square meter at optimum conditions, and
> > then figured the area required to produce the same amount of watts as
> > found in other sources (i.e. gasoline, nuclear, coal, whatever) and
> > even assuming 100% efficiency for the photovoltaic cell, an enormous
> > amount of area is required to produce the same amount of power, say
> > in 15 gallons of gas.
>
> 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.
>
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