Pump - & W : pump power Operating Equations (as...

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1 ME 416 Computer Assisted Design of Thermal Systems Pump Performance Characteristics Basic Definitions Discharge Coefficient: C = V N D Q 3 Pressure Coefficient: C = P N D H 2 2 Δ ρ Isentropic Efficiency: η s ideal actual = W W Specific Speed: ( ) N = NV P s 1/2 / / ρ 3 4 3 4 Δ where V : volume flow rate ρ : density of fluid D: rotor diameter N: pump speed Δ P: pump pressure boost
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Unformatted text preview: & W : pump power Operating Equations (as adapted by K.S. Shelby) Axial Flow Pump: C H = 2.9253 - 4.3748C Q + 6.548C Q 2- 5.0912C Q 3 s = (-1.9531 + 253.51C Q- 156.06C Q 2- 43.822C Q 3 )(.01) Centrifugal Pump: C H = 5.7529 + 1.6748C Q + 27.735C Q 2- 643.7C Q 3 s = 0.022009 + 17.372C Q- 95.082C Q 2 + 113.59C Q 3...
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