REFLECTOR: Exhaust systems

[Brian Michalk]

Oh, I understand.  I know that delta temps of zero degrees are impossible,
due solely to the laws of thermodynamics.

I was trying to illustrate that as exhaust temperature approaches intake
temperature, efficiency goes to 100% -- thermodynamics notwithstanding.

I also know that ther is no engine today anywhere close to this.  I had no
idea fuel cells were anywhere this good.

> -----Original Message-----
> From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]On
> Behalf Of John Dibble
> Sent: Wednesday, July 16, 2003 7:57 AM
> To: reflector@tvbf.org
> Subject: Re: REFLECTOR: Exhaust systems
>
>
> Brian,
> I agree with your comments about compression ratio, power, and
> EGT.  However, you
> can't get the EGT at the intake temp because the laws of
> thermodynamics limit the
> maximum energy extraction for an internal combustion engine at
> around 30%.  Fuel cells
> can extract around 90% of the energy, but we're a long way from a
> practical fuel cell
> that will work on a practical fuel like gasoline.
>
> Brian Michalk wrote:
>
> > The most efficient engine would have an EGT that is the same as
> the intake
> > temperature.  That would mean 100% energy extraction from the
> fuel.  Where
> > can I get one of those?
> >
>
>
>
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