Re: [EVDL] Driving on Glass? Inventor Hopes to Lay Down SolarRoads: Scientific Americ
Jeff and Thor, I agree with both of your comments. Back in 1985 I built a
two story home. I designed it, I drew the complete plans. I supervised the
foundation work, and Concrete slab floor for "Thermal mass," Carpentry,
framing, siding, plumbing, wiring, roofing, plastering, and finishing. .
The south side was only one story for 20 feet then up six feet to the roof
of the second story which was 1/3 smaller than the first story. We used
"Tin" roofing and the sun reflecting off the tin shined on that second story
wall and it was BRIGHT About two times normal... but I never could afford to
put P.V. Panels up there and I sold out in 1998.
Regards, --------And Happy Holidays-------
Dennis Miles, (Director) Electric Vehicle Technical Institute Inc.
Tampa Bay Region, Florida, USA Phone (863) 289 - 0690
[quote] Jeff Shanab <email@example.com> wrote:
> BTW, it has been shown you can get 100x out of a solar panel with
> adequate cooling and concentration. (I think 25x is where they settled
> as reasonable)
> While it shortens the life, and complicates the construction it also
> saves you nothing on roof area.
> However, if you need to warm up the pool anyway, or provide domestic hot
> water, Maybe, on a system level, costs could be reduced.
> > Ya know, the real problem with solar isn't the available area, it's
> > the cost. If I could afford (or get < 10 year payback!) on replacing my
> > roof with solar shingles or adding panels to my roof, I'd do it in a
> > heartbeat as would most businesses (and quite a few residences).
> > But in GA, without subsidies, it's a 21 year break-even point.
> > So I'm continually less-than-impressed with "higher efficiency" solar
> > cells (and there are some that are > 40% *now*) at higher costs, and
> > the "less expensive" ones haven't materialized. If I could pay $1/watt
> > and get even 10% efficient cells, I could afford to do my entire roof.
> > -Thor Johnson
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