Page 107 - Advanced Gas Turbine Cycles

80 Advanced gas turbine cycles

tTcot=1200C
+Tcot=1400C

-A-Tcot=IeoOC
fTcot=1800C

+ Tcot = 2000 C

15 20 25 30 35 40 4s 50 55
PRESSURE RATIO
Fig. 5.6. Overall efficiency of [CBTIlcs plant with three step cooling (of first stage and second nozzle row) as a
function of pressure ratio with combustion temperature as a parameter (after Ref. [2]).

01
E
A
*
0
u
U
u.
w
v
-I
w

41

40
lo00 I200 1400 1800 1000 2000 ZOO
COMBUSTION TEMPERATURE 'C
Fig. 5.7. Overall efficiency of [CBTIIc1 plant with three step cooling (of first stage and second nozzle row) as a
function of combustion temperature with pressure ratio as a parameter.