Questions about Conbined Cycle Upgrade

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Thread Starter

Abhijit

presently OUR PROJECT (AGTP, NEEPCO) is having 4x21 MW GTGs. it is upgraded to combined cycle aiming an additional 51 MW power generation. For the four gas turbines four HRSGs have been installed. Why not two HRSGs is used instead of four HRSG?
 
It's pretty well up to the client to specify which way he wants to go. A lot of the decision is based on how you operate your plant and how you do your maintenance. With one HRSG/machine it means you can do turbine and boiler maintenance at the same time or maintain the HRSG with the turbine running (through the bypass). With only two HRSG it can make maintenance a little more complicated.
 
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