Effect of Reheating and Feed Water Heating on Steam Generation P M V Subbarao Professor Mechanical Engineering Department Good to Turbine and Cycle…..

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Presentation transcript:

Effect of Reheating and Feed Water Heating on Steam Generation P M V Subbarao Professor Mechanical Engineering Department Good to Turbine and Cycle….. What about Steam Generator ???

Effect of Reheat Pressure  p rh /p max ~0.3

Selection of Optimal Reheat Point

Reheat Supercritical Rankine Cycle 1 2 2s

Reheating : A Means to implement High Live Steam Pressure Improvement in Efficiency, % 593/621 0 C 593/593 0 C 565/593 0 C 565/565 0 C 538/565 0 C 538/538 0 C Supercritical

Single-Reheat Ultrasupercritical Product Line GE Power

Super Critical Cycle ~ 1990

Double Reheat Ultra Super Critical Cycle 8

Reheater Pressure Optimization for Double Reheat Units

Improvement in Efficiency, %

Scope for Double Reheat in Ultra CriticalCycles C C C P,bar

Super Critical Cycle of Year 2005

Double Reheat Super Critical Plants Net efficiency on natural gas is expected to reach 49%. Net efficiency on coal is expected to reach 47%.

Super Critical Cycle of year 2010 > 50 %

Double-Reheat Ultrasupercritical Product Line GE Power

Ultra Supercritical Installations of The World

  C   C   C   C Reassessment Thru Carnot Model

 s        Non-Isentropic Expansion !!! A Macro Carnot Cycle !!!!

Ideal Regenerative Cycle      

Regenerative Turbine Regenerative heat transfer. Change in kinetic and potential energies are negligible 3 4 T  ssuming a single fluid entering and leaving…

Analysis of Regeneration Cycle  s       