Page 206 - Advanced Gas Turbine Cycles

Chapter 9. The gus turbine us u cogeneration (combined heat und power) plant 171
1'
CONVENTIONAL
POWER PLANT

1 [bl
[a1
(QNU)C
PLANT WITH
CONVENTIONAL WASTE HEAT
BOILER RECUPERATOR

@)CG ('")D
I (QNU~CG

(QNu~

MATCH ED
PLANT WITH
WASTE HEAT
BOILER

4 QNU
Fig. 9.3. (a) Reference system, (b) matched CHP plant with WHR, and (c) matched CHP plant with WHB.
and the fuel saving in using a CHP plant is therefore

(9.6)
The fuel energy savings ratio (FESR) is then defined as the ratio of the saving (AF) to the
fuel energy required in the conventional plants,
FESR=-- AF -+--- 1 -+- ) =I- ( 7)C/r)CG)
FUEF - 7)CG >/( : 1 + (AD~C/~)B)
:C
(:C
'
(9.7)