EXERGY ANALYSIS AND PARAMETRIC STUDY OF REHEAT REGENERATIVE ULTRA SUPERCRITICAL RANKINE CYCLE WITH FEED WATER HEATERS

Exergy analysis and parametric analysis have been carried for supercritical Rankine cycle with reheat, open and closed feed water heaters of higher power generation for modern steam power plants at supercritical, ultra supercritical and advanced ultra supercritical temperatures and pressures. The pressure range between 200 to 425 bar and the temperature range between 500°C-750°C have been studied in this cycle. The variation of reheat pressure is 0.2 to 0.4 times the initial pressure of the turbine has analyzed. The effect of terminal temperature difference between 3 to 8 has studied. The variation in condenser pressure has been studied from 0.02 to o.1 bar. The effects of the flue gas inlet and outlet temperature of the boiler has been analyzed from 80°C-300°C and 900°C-1400°C respectively. The energy and exergy efficiencies, irreversibility and fractional exergy losses of all the components of the cycle have been estimated. The energy and exergy analyses were performed for each component in the system and the results tabulated. The variations of irreversibility, efficiency and fractional exergy loss with several parameters were graphically investigated. The results show that a clearer definition of the real losses in the system is given by the exergy method of analysis. The results are tabulated and shown in the graphs.