Re: useful analogy
From: Stephen Sprunk (stephen_at_sprunk.org)
Date: 09/03/04
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Date: Fri, 3 Sep 2004 16:57:55 -0500
[ comp.os.linux.advocacy dropped ]
"Jim Richardson" <warlock@eskimo.com> wrote in message
news:ficg02-e5u.ln1@grendel.myth...
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> On 31 Aug 2004 12:37:46 -0700, ziliath <ziliath@myway.com> wrote:
>> You can think it, but that won't make it true.
>> The cost to manufacture ethanol fuel is $0.50 per gallon,
>> and that comes from multiple sources.
>
> And the cost to extract and refine gasoline? It *sells* for ~$2/gal here
> in the states, but a lot of that is taxes, and some profit, not the
> cost.
Data from 24 June 04
Reported retail prices before any taxes, rebates, or subsidies
87 Unleaded nat'l avg $1.28
E100 nat'l avg $1.83/gal, range $1.25-$2.01/gal
If you exclude Milwaukee, WI, from the E100 survey then the low end of the
range rises to $1.72/gal. I'm not sure why the price at that one location
is 27% lower than the next-lowest price -- it might be a fluke, or it might
be a different process that's more efficient.
However, on average E100 needs to get about 25% cheaper per gallon to match
unleaded price levels, plus another 20% cheaper to account for the lower
energy density. Existing yeasts processing corn (which all of the US
commerical plants use today) are known to be far behind what's possible;
other discussions in this newsgroup showed three times as much ethanol per
acre can be produced with switchgrass, and a 40% yield increase can be made
with corn simply by using engineered yeast. The needed 45% improvement is
certainly possible within a few years, but current production is still
orders of magnitude off from what's needed to replace oil imports.
S
-- Stephen Sprunk "Those people who think they know everything CCIE #3723 are a great annoyance to those of us who do." K5SSS --Isaac Asimov
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