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SSSF Analysis of Devices Used in Power Generation - II
P M V Subbarao Professor Mechanical Engineering Department Sources of Work for Manufacturing Industry …..
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Schematic of Rankine & Brayton cycles
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Pump : Adiabatic Process
1 2 SSSF: Conservation of mass First Law : Liquids are incompressible, change in volume per unit change in Pressure is negligible.
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Pumping of Incompressible Fluids
Adiabatic pumping of a liquid is almost an Isothermal process!!
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Enthalpy Diagrams
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2 – 3 : Steam Generation : Isobaric Heating
QCV No work transfer, change in kinetic and potential energies are negligible
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Oil Fired Steam Boiler
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Enthalpy Diagrams
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The Turbine : Creator of Mechanical Torque & POwer
Stator Rotor
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U Vr1 Va1 Inlet Velocity Triangle Va1 Vr1 U Exit Velocity Triangle U Vr2 Va2 Vr2 Kinematics of Flow Past A Rotor Blade
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Axial Turbine Stator Exit/Rotor Inlet Velocity Triangle
Va1 Va1 Vw1 Vr1 a1 a1 Vw1 b1 Vf1 Vf1 Va0 Vf0
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U Va2 a2 Vr2 b2 a1 Vr1 b1 Va1 Va1: Inlet Absolute Velocity Vr1: Inlet Relative Velocity Vr2: Exit Relative Velocity Va2:Exit Absolute Velocity a1: Inlet Nozzle Angle. b1: Inlet Blade Angle. b2: Exit Blade Angle. a2: inlet Nozzle Angle (next stage).
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Turbine : Adiabatic Process
3 4 T No heat transfer. Change in kinetic and potential energies are negligible Assuming a single fluid entering and leaving…
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Diagram of Large Power Plant Turbine
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HP Turbine Rotor
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LP Turbine Rotor
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Highly compressible flow through Turbine
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Steam Power Plant: A series of CVs in SSSF
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4 – 1 : Condenser : Isobaric Cooling : p4 = p1
QCV 4 1 No work transfer, change in kinetic and potential energies are negligible Assuming a single fluid entering and leaving…
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Schematic for Power Plant with cooling Water from A River
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