In addition, the impact of temperature and pressure of
steam entering the steam turbine on the overall system performance
was also investigated. We studied a range of temperatures
(750, 800, and 850 K) and a range of pressures (6300,
7300, and 8300 kPa). Increasing the temperature and pressure
of steam demanded more syngas fed to the duct-burner after
the gas turbine to provide more heat for steam generation. For
these conditions, the power to grid decreased as temperature
of steam entering the steam turbine was increased while the
power to grid increased by 0.2e0.5MWwhen pressure alone is
increased. Higher temperature and pressure of steam turbine
require sophisticated and costly equipment. Considering the
small increase in power to grid and added cost to the overall
system, steam entering the steam turbine kept constant at
750 K and 6300 kPa for the rest of the simulations.