Re: What Future Now For The Railways?
- From: azb@xxxxxxxxxx (Andrew Robert Breen)
- Date: 2 Feb 2006 17:44:20 -0000
In article <drt4im$1j3j$1@xxxxxxxxxxxxxxxxx>,
Charlie Hulme <info@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
Brimstone wrote:
So steam is not a gas?
Yes it is, but a 'steam turbine' is not a 'gas turbine'. A gas turbine,
in its normal meaning, uses combustion products directly to drive the
turbine.
Stick with this distinction or you will confuse everyone.
"Gas turbine" is the colloquial term used for a Joule- or Brayton-cycle
engine.
"Steam turbine" is the colloquial term used for a rotary machine
expanding a continuous flow of steam (though the gas phases of other
liquids can be used) via a Rankine cycle.
In the "steam turbine" the combustion process is separate from the
engine, in the "gas turbine" they're combined.
HTH :)
--
Andy Breen ~ Not speaking on behalf of the University of Wales, Aberystwyth
Feng Shui: an ancient oriental art for extracting
money from the gullible (Martin Sinclair)
.
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