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Optimizing Combined Cycle Power Generation for Enhanced Efficiency: The Concept of Super Regeneration

Explore the concept of super regeneration in combined cycle power generation for improved energy efficiency. Learn about the components, energy transfer diagram, and thermal analysis involved in maximizing power output. Understand the impact of pressure ratio, temperature, and pressure on system performance. Enhance your knowledge of Brayton and Rankine cycles and the benefits of proper operating variable selection. Sensitivity analysis and objective functions for maximizing specific power output are discussed.

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Optimizing Combined Cycle Power Generation for Enhanced Efficiency: The Concept of Super Regeneration

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  1. More Mechanical Power From Fuel Power P M V SUBBARAO PROFESSOR MECHANICAL ENGINEERING DEPAREMENT IIT DELHI Enhance Regeneration by All Means……..

  2. The Concept of Super Regeneration

  3. The Super Regenerative Cycle

  4. The Field Cycle

  5. COMPONENTS OF COMBINED CYCLE

  6. ENERGY TRANSFER DIAGRAM

  7. Energy Balance in Combined Cycle Fuel Power Waste Heat Final Waste heat

  8. Thermal Analysis of Combined Cycle Net Power Output of Brayton Cycle: Rate of Heat Rejected in Brayton Cycle: Rate of Heat input to Rankine Cycle: Net Power Output of Rankine Cycle:

  9. Net Power Output of Sandwich: Overall Efficiency of Sandwich:

  10. Sensitivity Analysis Increasing the gas turbine efficiency improves the overall efficiency only if:

  11. The rate of change of efficiency of Rankine cycle with respect to Brayton cycle is always negative. A care should be taken while improving the efficiency of Brayton cycle, so that it will not adversely affect the performance of Rankine cycle. A proper selection of operating variables of Brayton cycle and Rankine cycle is essential in getting maximum benefits due to Combination.

  12. Free Parameters of the System • Pressure ratio in gas turbine. • Maximum temperature of steam. • Maximum pressure of steam. • Reheat pressure. • Reheat temperature. Objective Functions Maximize overall specific power output.

  13. hR=0.3 hR=0.35 hR=0.4

  14. EFFECT OF PRESSURE RATIO

  15. EFFECT OF PRESSURE RATIO

  16. EFFECT OF PRESSURE RATIO : Reheat Brayton

  17. EFFECT OF PRESSURE RATIO : Reheat Brayton

  18. Single Pressure Cycle

  19. COMPONENTS OF COMBINED CYCLE

  20. ENERGY TRANSFER DIAGRAM

  21. Energy Balance in Combined Cycle Fuel Power R B Waste Heat HRSG Final Waste heat

  22. Thermal Analysis of Combined Cycle Net Power Output of Brayton Cycle: Rate of Heat Rejected in Brayton Cycle: Rate of Heat input to Rankine Cycle: Net Power Output of Rankine Cycle:

  23. Net Power Output of Sandwich: Overall Efficiency of Sandwich:

  24. Sensitivity Analysis Increasing the gas turbine efficiency improves the overall efficiency only if:

  25. The rate of change of efficiency of Rankine cycle with respect to Brayton cycle is always negative. A care should be taken while improving the efficiency of Brayton cycle, so that it will not adversely affect the performance of Rankine cycle. A proper selection of operating variables of Brayton cycle and Rankine cycle is essential in getting maximum benefits due to Combination.

  26. Free Parameters of the System • Pressure ratio in gas turbine. • Maximum temperature of steam. • Maximum pressure of steam. • Reheat pressure. • Reheat temperature. Objective Functions Maximize overall specific power output.

  27. hB hR=0.3 hR=0.35 hR=0.4

  28. Single Pressure Cycle

  29. EFFECT OF PRESSURE RATIO

  30. EFFECT OF PRESSURE RATIO

  31. EFFECT OF PRESSURE RATIO : Reheat Brayton

  32. EFFECT OF PRESSURE RATIO : Reheat Brayton

  33. Energy Transfer Diagram

  34. Energy Balance Diagram

  35. Energy Flow Diagram Effectiveness of HRSG

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