Abstract
The article presents the results of thermodynamic analysis of the
supercritical coal-fired power plant with gross electrical output of 900
MW and a pulverized coal boiler. This unit is integrated with the
absorption-based CO2separation installation. The heat required for
carrying out the desorption process, is supplied by the system with the
gas turbine. Analyses were performed for two variants of the system. In
the first case, in addition to the gas turbine there is an evaporator
powered by exhaust gases from the gas turbine expander. The second
expanded variant assumes the application of gas turbine combined cycle
with heat recovery steam generator and backpressure steam turbine. The way
of determining the efficiency of electricity generation and other defined
indicators to assess the energy performance of the test block was showed.
The size of the gas turbine system was chosen because of the need for heat
for the desorption unit, taking the value of the heat demand 4 MJ/kg CO2.
The analysis results obtained for the both variants of the installation
with integrated CO2separation plant were compared with the results of the
analysis of the block where the separation is not conducted.
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