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Re: [ST] for Brett - fuel economy
- Subject: Re: [ST] for Brett - fuel economy
- From: Ken Nisula <knisula@xxxxxxxxx>
- Date: Tue, 18 Apr 2006 08:17:30 -0700 (PDT)
I wonder Matt, do the other PA Engineering schools
cover the theory of heat transfer in their
Thermodynamics and Fluid Mechanics classes? As a
proud Bison yourself, I'm sure you learned these
principals for Mechanical engineering!
Ken
--- Matthew Heyer <matthewheyer@xxxxxxxxx> wrote:
> There's your tuition's worth of a Lehigh University
> Chemical Engineering degree! Nice Ken....
>
> Matt Heyer
>
> ----- Original Message ----
> From: Ken Nisula <knisula@xxxxxxxxx>
> To: ST@xxxxxxxxxxxxxx
> Sent: Tuesday, April 18, 2006 10:57:49 AM
> Subject: Re: [ST] for Brett - fuel economy
>
>
> My understanding is not that an oxygen molecule is
> replaced, otherwise humid days would decrease the
> %O2
> in the air below 21%, rather the water molecule can
> absorb considerably more heat than air alone. Thus
> more energy from the internal combustion is used up
> heating the excess water vapor in the fuel/air
> mixture, rather than transferring to the overall
> efficiency of the engine. Thus the best combustion
> weather is a cool, dry day!
>
> Ken
>
> --- David Jonas <kahonas@xxxxxxxxx> wrote:
>
> > On 4/17/06, Emile Nossin <Emile@xxxxxxxxxx> wrote:
> > >
> > > ... moisture should make the air density
> higher).
> >
> >
> > I had thought that moisture in the air actually
> > decreased the density, hence
> > why aircraft don't like humid days. When a water
> > molecule replaces one of
> > oxygen, wouldn't it weigh less? Atomic weight of
> 2
> > Hydrogens and an oxygen
> > (H2O) is significantly less than that of 2 oxygens
> > (O2).
> >
> > Somebody with a better grasp on chemistry and
> > weather phenomena please
> > correct me if I'm mistaken.
> >
> > David
> > _______________________________________________
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>
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