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Hydraulic Equations 09

# Hydraulic Equations 09 - Bernoulli Equation 2 2 2 2 1 2 1 1...

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Revised August 27, 2009 U SEFUL E QUATIONS FOR H YDRAULIC A NALYSES Pump Performance F 60 H2O, . . fluid g sp where sp.g. is referenced to water = 62.37 lbm/ft 3 @ 60 °F hr m 4 . 4 s ft 449 . . 500 hr lb gpm , 3 3 m g sp m Q Flow . . psi 31 . 2 ft g sp P Head 31 . 2 . . ft psi g sp Head P 1715 psi gpm 3960 . . ft gpm P Q g sp H Q hp Hydraulic pump hp Hydraulic bhp hp Brake where pump is the pump efficiency, 0 – 1. motor hp Brake hp Purchased where motor is the motor efficiency, 0 – 1. 1 hp = 550 (ft lbf)/s = 33,000 (ft lbf)/min = 745.70 W = 0.7457 kW = 2,544.5 Btu/hr
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Unformatted text preview: Bernoulli Equation 2 2 2 2 1 2 1 1 2 2 z g g g V p z g g g V p c c c c where g c = 32.174 2 m s lbf ft lb Mechanical Energy Balance friction to due work lost P g V z g g W c c s 2 2 where = 1 for fully developed turbulent flow, and = 2 for laminar flow. W s = hydraulic work, (ft lb f )/lb m...
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