A Thermodynamic Analysis of Two Competing Mid-Sized Oxyfuel Combustion Combined Cycles

Table 6

Assumptions used in cycle simulations.

Compressor polytropic efficiency	0.91
Compressor mechanical efficiency	0.99
Combustor pressure drop	4%
Turbine polytropic efficiency	0.90
Power turbine polytropic efficiency	0.89
Gas turbine mechanical efficiency	0.99
Generator electricity efficiency	0.985
Generator mechanical efficiency	0.994
Lower heating value for fuel	46885 kJ/kg
Fuel temperature	15^∘C
Fuel compressor isentropic efficiency	0.80
Ambient temperature	15^∘C
Ambient pressure	1.013 bar
Ambient humidity	60%
Condenser pressure	0.045 bar
HRSG heat exchangers , hot side	0.001 bar
HRSG heat exchangers , cold side	0.9 bar
Steam turbine isentropic efficiency	0.89
Superheater, LP,	10 K
Superheater, HP, minimum	25 K
Evaporator	10 K
HP steam pressure	140 bar
HP steam maximum temperature	560^∘C
LP steam pressure	7 bar
Pump efficiency	0.7
Pump mechanical efficiency	0.9
Deaerator operating pressure	1.21 bar
Deaerator saturation temperature	105^∘C
ASU power consumption	735
O2 purity	95%
O2 compressor polytropic efficiency	0.88
ASU delivery pressure	1.2 bar
ASU delivery temperature	30^∘C
Carbon dioxide compression power	350
Condenser efficiency, maximum	0.85
Gross power output	100 MW