CEIE 230 Turbines Handout

CEIE 230 Turbines Handout - Water Turbine Classifications...

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1 Turbines Water Turbine Classifications Impulse Pelton Wheel Mixed Cross-flow Reaction Kaplan Francis Impulse Turbines Pelton Turbine F x t = Δ momentum F x t = m x Δ V blade Impulse from the nozzle (jet) Change in momentum of the blade • High nozzle KE (V)required • High head required • Relatively low flow Δ P across blade = 0 Δ V r across blade = 0 • Turbine wheel not enclosed Multi-Stage Impulse Turbine Reaction Turbines
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2 Reaction Turbine Reaction Turbine • Extracts energy by conversion: FE (through fixed blade) KE (fluid) KE (fluid) KE (moving blade) [Newton’s 3rd Law] Δ momentum (fluid) = Δ momentum (blade) • Relatively low head required (h T ) • High Flow Rates (Q) Turbine Selection Turbine Power Force F x = ρ Q(-V r )(1+cos β ) Work W = F x x c where: c= circumference of the turbine Power P
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This note was uploaded on 11/11/2009 for the course CEIE 230 taught by Professor Binnning during the Spring '09 term at George Mason.

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CEIE 230 Turbines Handout - Water Turbine Classifications...

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