Dear Sir How increased boiler pres 1

[pradeep4u]

Dear Sir
How increased boiler pressure leads to high flue gas temperature. I know it may be very easy question but i do not know the answer. Please guide me
Regards
Pradeep

 

[marty007]

I don't work in the power industry with large boilers, but I think this would go back to first principles:

Boilers operate at the saturation temperature of water. Higher pressure = higher temperature. If your boiler water is hotter, then it doesn't have as much driving force to take energy out of the flue gas. If it can't take out as much energy, then the flue gas will exit hotter.

 

[LittleInch]

What sort of increase and what sort of temperature?

However marty has it right from first principles.

If you change one parameter in a system, something else will need to change to meet it.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[pradeep4u]

Sorry for that. Thanks all for your replies.

 

[crshears]

It doesn't necessarily...if the boiler has an economizer, additional sensible heat will be extracted from the flue gases such that their exit temperature will be somewhat to well below the saturation temperature of the boiler water.

CR

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