Performance of the upgraded system.

You are an energy engineer required to assess the performance of a combined cycle gas turbine (CCGT)
system, shown on Figure 1 below, and offer recommendations on how the system can be upgraded and
improved.
CCGT Parameters
The topping cycle is a simple gas turbine with compression ratio of Q.
Efficiency of the compressor is 8W %.
Max temperature across the gas cycle is 1400 K.
Efficiency of the gas turbine is 8Y %.
Exhaust from the gas turbine is directed to the heat recovery steam generator (HRSG) where it is used to heat
the water to the superheated steam state.
Mass flow rate of water is R0 kg/s and the pinch point is 1E K.
The calorific value of the fuel is 50 MJ/kg.
The bottoming cycle is a simple Rankine cycle with the condenser pressure of 0.1 bar.
Steam enters the high-pressure turbine at 7T bar and 4W0 °C.
Efficiency of the steam turbine is 8R %.
Efficiency of the water pump is 9E %.
The system is expected to deliver 1W0 MW of power.
a) Evaluate the performance of the system.
Find the mass flow rate of fuel needed.
Clearly state the power output from gas and steam turbines, and power required for the water pump
and air compressor.
b) Based on the analysis in part (a), offer recommendations how the cycle performance can be
improved by adjusting the cycle parameters. Evaluate the performance of the improved system.
c) Consider changes in cycle design which could lead to further enhancement in performance. Design
changes may include upgrades and introduction of new components and processes in both topping
and bottoming cycle. Suggest operational parameters of new components and evaluate the
performance of the upgraded system.