Combine Cycle Power Plant (CCPP):

Combine cycle power plant is modernly emerged power plant which uses the heat from flue gas exhausted by gas turbine to produce steam to operate the steam turbine as well. In another way CCPP may be defined as a combine cycle power plant including both GT and ST.

There are actually two separate units under CCPP.

1.      GT-1 (Combine cycle mode)

2.      GT-2 (Open cycle mode)

                              Figure: Gas Turbine Unit.

Gas Turbine Unit:

In gas turbine unit both GT-1 and GT-2 is same except that the flue gas of GT-1 is used to produce steam in combine cycle. The flow diagram of gas turbine units is shown in below.