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Originally Posted by Interpreter  Dead easy this one. Ratcliffe-on-Soar Power Station. The turbines are cooled by hydrogen gas. Hydrogen has the highest latent heat capacity of any of the gases. Before working on the turbines, the hydrogen is purged by carbon dioxide. It is interesting to see the pipes freezing up as the carbon dioxide travels through them. The CO2 is then purged with air to make it safe for the APOs and engineers to work on them.
What I think you are talking about is the cooling of the water before being returned to the river from whence it came. Water is used to cool this as it passes through the cooling towers. This is a completely different part of the system and water has absolutely nothing to do with the cooling of the generators, if my memory serves me correctly. It is a long time since I was there.
I believe that Germany has superheated boilers. We do not. |
I did wonder if you meant the cooling of the stator windings and casing etc.
Hydrogen cooling is the norm for cooling within the casing as it is around 7% the density of air and has ten times the thermal capacity of air, thus passing hydrogen rather than air reduces significantly the 'windage losses' and provides greater heat removal.
However the stator windings which are tubular are water cooled.
Must say we are getting away from the original thread!
John D