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Future Policy on Embedment of Reheat and Regeneration in Rankine Cycles. P M V Subbarao Professor Mechanical Engineering Department. Be Frank on Reconciliation or Breakup ……. Macro Differences in Cycle due to Reheat Vs Regeneration. Regeneration in Reheat Cycle.
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Future Policy on Embedment of Reheat and Regeneration in Rankine Cycles P M V Subbarao Professor Mechanical Engineering Department Be Frank on Reconciliation or Breakup ……
Power Plant with an Auxiliary Turbine • A substantial rise in the temperature of steam, especially reheated steam (to 720C), aggravates the problem of the difference between the bleed steam and the heated water temperatures in FWH. • This is more serious issue with heaters fed with bleeds from the intermediate pressure turbine, which are situated right after the steam reheater. • Passing the bleeds from the intermediate pressure part of the main turbine to a separate extraction backpressure turbine fed from the turbine high pressure turbine outlet before the first reheat will decrease overall irreversibility • By keeping pressures in the bleeds at the same level, the temperature differences in the heaters fed from the auxiliary turbine are much lower.
900 MW Advanced ultra-supercriticalpower unit with single reheat 7.5MPa &720C 35MPa &700C 330C 0.005 MPa
900 MW Advanced ultra-supercriticalpower unit with single reheat with AT
900 MW Advanced ultra-supercriticalpower unit with Double reheat 13MPa &720C 3MPa &720C 37.5MPa &700C 332C 0.005 MPa
900 MW Advanced ultra-supercriticalpower unit with Double reheat & AT -1
900 MW Advanced ultra-supercriticalpower unit with Double reheat & AT-2
Basic indices of the 900 MW power unit in various configurations
Efficiency of Danish Coal-Fired Power Plants Continuous development resulted around the mid 80's in an average efficiency of 38% for all power stations, and best values of 43%. In the second half of the 1990’s, a Danish power plant set a world record at 47%.
Average efficiency, specific coal usage, CO2 emissions h Indian Coal Plants: Efficiency of modern coal power plant = 34-36% Efficiency of old power plant = 20-30%
Life Cycle of Nuclear Fuel Safe Disposal
Comparison of Life-Cycle Emissions Tons of Carbon Dioxide Equivalent per Gigawatt-Hour
Types of Reactors • Pressurised water reactors (PWR, VVER) • Boiling water reactors (BWR) • Pressurised heavy water reactor (PHWR) • Gas-cooled reactors (Magnox, AGR, UNGG)