from the Forum department...
sliding pressure operation
Power generation equipment control. topic
Posted by saravanakumar on 16 April, 2012 - 1:31 pm
can anyone tell me about sliding pressure operation of boilers....?

and also is it useful for countries like india where power demand is greater than supply and so mostly every plant runs at mcr condition....?

if anyone can explain this please send some relevant information.....
my email id is


1 out of 1 members thought this post was helpful...
Posted by krush on 18 April, 2012 - 6:02 pm
Constant pressure keeps the same working pressure in the boiler and controls power output by using control valves on the turbine and adjusting firing rate.

Sliding pressure essentially keeps the control valves on the steam turbine wide open and adjusts output with pressure/firing rate.

I kept it very simple and there are more details and constraints, but that's the idea.

Here's an article for super critical boilers, even though I bet you are asking about combined cycle: -new-supercritical-plants_491_p3.html

Here's a topic:

and here:

Posted by saravanakumar on 20 April, 2012 - 12:44 am
thanks for your reply sir...

but my question is that is there any possibility for plants in countries where there is no plants are forced to run in part load conditions because of greater demand always.....

and also how it differs from turbine follow mode...

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