Steam Turbine

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Steam Turbine
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Basic Configuration
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Nozzle
Convergent nozzle
Convergent-divergent nozzle
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Nozzle
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Impulse Stage
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Pressure-compounded Stage
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Velocity-compounded Stage
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Pressure-velocity Compounded Turbine
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Reaction Turbine
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Velocity Diagram
F
T
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Optimum Velocity
Impulse Stage
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Optimum Velocity
Velocity-compounded Stage
where n is the number of stages
If n 2, P(1) P(2) 31.
If n 3, P(1) P(2) P(3) 531.
Therefore, n gt 2 is not economically justified.
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Optimum Velocity
Reaction Stage
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Maximum Efficiency
Impulse Stage
Reaction Stage
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Comparison of Stages
Impulse Stage
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Comparison of Stages
Two-stage velocity-compounded Impulse Stage
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Comparison of Stages
Reaction Stage
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Turbine Types
process
condenser
Straight-flow condensing
Back-pressure
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Turbine Types
One section
Two sections
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Types of Turbine
Reheat turbine
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Types of Turbine
Extraction turbine
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Types of Turbine
Triple-flow
Four-flow
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Types of Turbine
Cross-compound
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Steam Turbine Control
Change power by changing steam flow rate (m) or
steam inlet enthalpy (hin).
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Governor