Re: (erielack) Inaccuracies in models....

["Schuyler G Larrabee" <sgl2_@_ix.netcom.com>]

oops!  You are completely correct.  Superheaters >>super heat<< the steam,
raising the temperature higher, making the steam "dry" as opposed to 212
degree steam which was "saturated."   Now the steam in the boiler was higher
in temp than 212 because it was under pressure, but I don't know the
temperature it was operated at.

By contrast "feedwater heaters" do what I said, the heat the water to be fed
into the boiler.

Superheaters do not equal feedwater heaters.

Sorry.

SGL
- ----- Original Message -----
From: <Hhaines_@_aol.com>
To: <sgl2_@_ix.netcom.com>
Sent: Tuesday, May 01, 2001 10:53 PM
Subject: Re: (erielack) Inaccuracies in models....


> Dear Mr. Larrabee,
>
> Thanks for confirming what I wrote him, but I thought that the
superheaters
> were in the smokebox area to heat the steam to higher
temperatures/pressures
> to get more work out of the steam.  If I read your note correctly the
> feedwater heater used spent steam off the cylinders?  I can read the
diagrams
> but they are fuzzy as to which way the flow was going.
>
> Either way, it was more energy efficient and economical.  And they didn't
> have those Elesco's until the late 1920s.
>
> H Haines

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