Environmental Engineering Reference
In-Depth Information
The change in CO 2 emission is usually result of the inefficient combustion
process. In this evaluation we will take into a consideration only adverse
changes of the CO 2 meaning the increase of concentration of CO 2 in exhaust
gases. The measurement of CO 2 will be obtained from the respective
instrumentation at the outlet of exhaust gases and will be expressed in gr/kWh.
The maximum value of the potential change of the CO 2 emission indicator is
150 gr/kWh.
Power plant efficiency will be determined
TT
HHV G
max
exit
.
tot
(4)
where
T max - Maximum temperature
T exit - Exit temperature
HHV - High heating value
G - Gas consumption
Temperature measurement will be obtained by the respective
instrumentation. It is assumed that T max and HHV value are constants. The
maximum change of T exit is assumed to be ΔT exit = 50 º C.
Gas price will be obtained by the reading the respective gas market price.
It will be defined in Eurocent/ 1000 m 3 with maximum gas price .
Maintenance indicator will be the percentage of the total energy cost and
will be defined in the time scale based on the data on gas market.. It will be
expressed in Eurocents/kWh. Determination of the maintenance cost will be
based on the percentage of the total electricity energy cost . Natural gas fired
power plant electricity cost is assumed to be , and maximum maintenance cost
is Eurocent/kWh
All indicators will be defined with 25, 50, 75 , 100 % change and
resilience index will be determined for different options.
3.5.5.1. Options
The options of gas power plant resilience taken into consideration are
designed with the sustainability index changes reflecting respective indicator
change. In the option design special attention is will be devoted to priority
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