Page 141 - Advanced Gas Turbine Cycles

Chapter I. The combined cycle gar turbine (CCGT) 113

1 “4 ,; cc
2
C

H, \ : 4
/
8 L QL
b ,,M*

T
\
a , , r wL
, CON

0 sp. P*

Fig. 7.3. Open circuit gas turbindclosed steam cycle combined plant (CCGT). No supplementary firing
(after Ref. [I]).

so that

= F - [Hps - Hw] - WH, (7.14)
where Hpo is the enthalpy of products leaving the calorimeter in a ‘calorific value’
experiment, after combustion of fuel Mf at temperature TO.
The arbitrary overall efficiency of the combined plant (Eq. (7.12)) may then be written
as

(7.12a)