[AT] OT: Gas story

[Rick Weaver]

Good morning!

This debate got me to try to research this question because I was under
the impression that not too far below ground (at least just a few feet)
that it stayed constantly 60 degrees or so.

Without posting the links, I saw a couple of research sites which stated
that the below ground temperature remained constant year over year at
15-20 meters.  *No site* says that worldwide the ground temperature at
that depth is the same.  It says that it approximates the annual average
temperature at that depth.  The further down you go (measured in
hundreds of feet), the warmer it gets due to heat from the core.

So take the average annual temperature in your area, and at 15 meters
(more than 45 feet) the soil temperature should match.  Shallower than
that, the daily temperature averages begin affecting the measurements.
At 1 meter, the previous day's average temperature is approximated.

I didn't expect this answer.  I always felt the cold earth wherever I
dug a hole and it reinforced the previous belief that the 60 degree
constant was true.

Rick Weaver

P.S. how this relates to gasoline in underground tanks - unless they're
buried 45 feet below ground, the daily average temperature will affect
the temperature of the gas stored there.  And even then, the temperature
will match the average annual temperature.  The 60 degree constant
isn't.
 
 
-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of George Willer
Sent: Wednesday, July 04, 2007 6:32 PM
To: 'Antique tractor email discussion group'
Subject: Re: [AT] OT: Gas story

Walt,

I guess it must be the different schools we went to.  

First, the ground temperature is NOT the same over the entire country.
It's
very close to the average year round air temperature of the area...
considerably warmer in the south.  The air temperature and sunshine (and
night time radiation) is mostly why the ground temperature is what it is
in
any given area.

Second, the pumps meter by volume, not by weight, so when the gas is
expanded by higher temperature there isn't as much energy in a measured
gallon.

Third, it's not really the temperature of the ground, it's the
temperature
of the contents of the tanker when delivering to a high volume outlet...
the
gas is warmed by a long trip through hot summer air and doesn't reach
the
temperature of the ground.  

Forth, Our division of weights and measures requires pumps to be
accurate
within 10%.  They almost never deliver more than standard.  :-(

Fifth,  Sometimes things may seem like a bunch of bull if you don't
understand them.

George Willer

> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com [mailto:at-
> bounces at lists.antique-tractor.com] On Behalf Of RonMyers at wildblue.net
> Sent: Wednesday, July 04, 2007 6:59 PM
> To: Antique tractor email discussion group
> Subject: Re: [AT] OT: Gas story
> 
> George,
> The temperature at the point where the underground tanks are stored is
on
> average 55 deg.  No matter what part of the country that you live in.
> North south east or west . this is set by the government regulations.
so
> it really doesn't matter where you get it from.
> In almost all states the meters on the pumps are tested to guarantee
their
> accuracy so this whole bunch of Bull is just that a bunch of Bull.
> You a full gallon of gas at each station or the government will come
down
> hard on the owners.
> 
> Ron
> 
> 
> > Some folks completely miss the point.  It's the temperature of the
gas
> > when
> > it's metered through the gas pump at the station that makes the
> > difference.
> > The gas that's expanded because it's warmer when it's measured and
sold
> is
> > the point.  You're paying for slightly more than you're actually
> getting.
> > I
> > doubt the difference that's claimed is as large as stated, but
there's a
> > difference anyway.
> >
> > George Willer
> >
> >> Subject: Re: [AT] OT: Gas story
> >>
> >> When you put the cold fuel in your hot tank sitting in the sun
> alongside
> >> the Mack doesn't it get warmer.
> >> I can't believe that anybody would believe that the temperature of
the
> >> fuel would make difference. If its gasoline its preheated before it
go
> >> into the Carb. If its diesel it preheated in the manifold same as
fuel
> >> injected cars.
> >>
> >> Ron
> >
> > _______________________________________________
> > AT mailing list
> > http://www.antique-tractor.com/mailman/listinfo/at
> >
> 
> 
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