Paper presented at the 8th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Mauritius, 11-13 July, 2011.
In order to be able to analyze performance of the coal fired
thermal power plant, a detailed mathematical model of thermohydraulical
processes in the steam generator, steam turbine and
feedwater line has been developed. Attention has been focused
on the influence of the reheater package size on the thermal
efficiency of the plant. History of the plant shows that the
reheater size had been decreased due to problems with coal ash
slugging, what eventually resulted in lower power output and
thermal efficiency decrease. Simulation results showed that
change of utilised coal for the type with improved slugging
characteristics would not achieve design temperatures unless
the reheater size would be restored. In this case the plant
thermal efficiency would be increased for 0.4-0.7 % resulting in
some 140000 euro/a operational cost savings.
