Page 179 - Advanced Gas Turbine Cycles

Chapter 8. Novel gas turbine cycles 145

FUEL (METHANE)

f AIR 7,
[JTzg: -0
HRSG

COZ CHEMICAL 7, . CYCLE
4 ABSORPTION, -1 COOLER WAER
STRIPPING CONDENSATE ’

Fig. 8.6. Cycle AI. Direct removal of (2% from an existing plant (after Chiesa and Consonni [l]).

with some 56% efficiency, through addition of the absorption equipment. They also
performed a detailed estimate of the extra capital cost, and found that the cost of electricity
increased by some 40%, from 3.6 ckWh for the basic plant to 5 c/kWh, due to the
combined effect of lower efficiency and higher capital cost.

FUEL (METHANE)
AIR
I

t

HRSG r $-zE-~ CYCLE
. , I

COOLER
L A . WATER LPSTW I
ABSORPTION,
LIQUEFACTION LIQUID C02

Fig. 8.7. Cycle A2. Semi-closed plant plus COz removal (after Chiesa and Consonni [ 11).