Page 187 - Advanced Gas Turbine Cycles

Chapter 8. Novel gas turbine cycles 153

I I OXYGEN
HYDROGEN

C T

WORKING
FLUID 7,
STEAM
HRSG TURBINE
CYCLE
COOLER
4 FOR WATER v
REMOVAL COMBUSTION
PRODUCED WATER
Fig. 8.16. Cycle C2. Hydrogen fuelled CCGT plant with closed upper cycle (after Bannister et al. [IO]).

efficiency from that of a reference engine with the same pressure ratio and maximum
temperature and burning natural gas. For the second case, with a substantial extra nitrogen
flow through the turbine-giving extra turbine work-the question of whether the fuel is
supplied at combustion chamber pressure becomes critical, i.e. whether the cycle has to be
debited with the nitrogen compression work.

HYDROGEN I I OXYGEN
H SUPERHEATED

STEAM 7,
HRSG

1L
WATER WET STEAM