Posted by Tony Conner on October 21, 2001 at 09:58:59:
In Reply to: Steam turbine efficiency development posted by Thomas Behr on October 21, 2001 at 09:36:01:
Could be fouling of the condenser tubes, non-condensibles collecting on the steam side, or a pocket of air trapped on the cooling water side.
Has the inlet cooling water temperature drifted up in that time? Have the inlet steam conditions for the turbine remained constant? (Same flow, pressure and temperature?) Are you pulling more extraction steam off the turbine?