Re: Interesting. Maybe it IS worth it!

#1

Hachiroku wrote:

Quote:

While the energy balance of ethanol production is controversial
and estimates vary widely, the economics are more certain. Ethanol
production from corn costs $1.10 per US gallon (290 $/m²).

How many BTU's in a gallon of corn ethanol compared to a gallon of 87
octane gasoline?

#2

Hachiroku <Trueno (AT) ae86 (DOT) gts> wrote:

Quote:

On Sun, 23 Oct 2005 23:54:17 +0000, Travis Jordan wrote:

Hachiroku wrote:
While the energy balance of ethanol production is controversial
and estimates vary widely, the economics are more certain. Ethanol
production from corn costs $1.10 per US gallon (290 $/m²).

How many BTU's in a gallon of corn ethanol compared to a gallon of 87
octane gasoline?

Here's the deal. According to the site, they have to cut ethanol with
gasoline to LOWER the octane, and E85 (85% Ethanol/15% gasoline) is 105
octane!

Sure...the higher the octane rating the lower the volatility of
the fuel...remember how a high octane rating will prevent
detonation?...that's because octane reduces volatility, IOW it's
not as flammable. People get the idea that high octane fuel is
more 'powerful' than low octane fuel whereas the opposite is
true.

The reason for this mistake is that you use high octane in
engines which have high compression therefore producing higher
power.

You 'cannot' use low octane fuel (which has more power) because
it'll detonate and ruin your engine...

I'd still like to know the BTU comparison between ethanol and 87
octane gasoline...I feel that the better buy is gasoline. (gut
feeling)
--

-Gord.
(use gordon in email)

#3

Gord Beaman wrote:

Quote:

I'd still like to know the BTU comparison between ethanol and 87
octane gasoline...I feel that the better buy is gasoline. (gut
feeling)

Since the OP didn't answer, I will:

•Btu content (LHV):
- Diesel fuel 128,450 per gallon
- Gasoline 116, 090 per gallon
- LPG 84,950 per gallon
- Natural gas 983 per cubic ft.
- Electricity 3,412 per kwh
- Coal 9,773 per pound
- Ethanol 76,330 per gallon

#4

"Travis Jordan" <no.one (AT) no (DOT) net> wrote:

Quote:

Gord Beaman wrote:
I'd still like to know the BTU comparison between ethanol and 87
octane gasoline...I feel that the better buy is gasoline. (gut
feeling)

Since the OP didn't answer, I will:

•Btu content (LHV):
- Diesel fuel 128,450 per gallon
- Gasoline 116, 090 per gallon
- LPG 84,950 per gallon
- Natural gas 983 per cubic ft.
- Electricity 3,412 per kwh
- Coal 9,773 per pound
- Ethanol 76,330 per gallon

Thanks Travis, appreciate it...
--

-Gord.
(use gordon in email)

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Re: Interesting. Maybe it IS worth it!

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