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Unformatted text preview: 10/31/05 10 of 12 Pump and Motor Efficiencies (Plant Design and Economics for Chemical Engineers, Fourth Edition, Peters & Timmerhaus, pp 520-521, 1991) Efficiencies of Drives for Pumps and Compressors From Turton, R.; Bailie, R. C.; Whiting; W. B.; Shaeiwitz, J. A. Analysis, Synthesis, and Design of Chemical Processes, 2 nd Edition , Prentice Hall, 2003, p 214. Electric Drive ( ) ( ) [ ] 2 log 5 . 1 log 5 . 11 75 s s drive W W + = 10 < W s <10,000 kW Steam Turbine and Gas Expander ( ) ( ) [ ] 2 log 3 log 36 18 s s drive W W + = 100 < W s <10,000 kW Internal Combustion Engine and Gas Turbine ( ) ( ) [ ] 2 log log 11 10 s s drive W W + = 100 < W s <10,000 kW...
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