Supercritical plants are being adopted foe improved efficiency, low
CO2 emission and reduced NOx, Sox, and particulate emission. In a supercritical plant, at critical pressure water
transforms to steam spontaneously. The critical pressure and temperature is 22.1 bars and 374.15 deg C. Effect of
steam parameters on turbine heat rate is such that for every 1 bar improvement of main steam pressure turbine heat
rate could be reduced by approx. 0.015 %. For every 100C improvement of main steam temperature turbine heat rate
could be reduced by 0.25 % to 0.30 %. For every 10 deg C improvement of reheat steam temperature, turbine heat
rate could be reduced by 0.15 % to 0.20 %. Drivers for higher rated supercritical plants are demand for power, lower
cost of generation, environmentally clean technology and lower requirement for fuel, land and water.