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To: Mind-numbed Robot
As steam it can hold extremely high temperatures. It is called super heated steam.

"Latent Heat of Vaporization", look it up and scratch your head a little.

Heat added to Saturated steam (at a given pressure)does nothing to raise the temp of the steam. It merely transfers more steam to a superheated (Dry Steam/No Water Vapor)) state. Only then can heat be added to increase temp.

As an example this would take place in a power plant. Superheated steam would be sent through the High Pressure stage of the turbine where Temp. and pressure is (Used)reduced.

The Superheated steam would then be sent back to the Boiler to a Reheat section. Exhaust/Flue Gases would be used to raise the Temp. of the steam but not the pressure. There would actually be a pressure drop due to piping. Then back to the Turbine through a Intermediate pressure section and then a Low pressure section.

The Temp. increase that takes place in the reheat section contributes to the Enthalpy equation.

Already paid for (Obtained from Flue Gas) these temps. are essential to efficient operations. They really do mean the top end for the plant.

17 posted on 02/21/2006 7:23:12 AM PST by vikzilla
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To: vikzilla
Thanks for the further clarification. I may have known all that at one time as I learned the little I know from selling water clarification systems, and later cogeneration systems, to power plants and others (Petrochem plants, refineries, paper mills, etc.) using large quantities of water in their processes.

It was always nice to find an application that could use the waste heat rather than the continuing cycle of heat, reheat, then cool, etc.

24 posted on 02/21/2006 12:46:36 PM PST by Mind-numbed Robot (Not all that needs to be done, needs to be done by the government.)
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