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OPTIMUM ECONOMIC PIPE DIAMETER FOR PUMPING HERSCHEL‐BULKLEY FLUIDS IN LAMINAR FLOW 1
Author(s) -
GARCIA EDGARDO J.,
STEFFE JAMES F.
Publication year - 1986
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1986.tb00105.x
Subject(s) - laminar flow , mechanics , herschel–bulkley fluid , volumetric flow rate , operating cost , flow (mathematics) , nominal pipe size , pressure drop , plug flow , materials science , physics , engineering , waste management , composite material
A method for determining optimum pipe diameter, for which total pumping system cost is minimum, has been derived for the transport of Herschel‐Bulkley (H‐B) fluids (power‐law fluids with a yield stress) in laminar flow. the method accounts for pipe system cost as a function of diameter, and pump station and operating costs as a function of power requirements. the optimum diameter can be estimated given rheological properties, fluid density, mass flow rate and economic parameters. Optimum diameter does not depend on system elevation or pressure energy difference when a linear relationship is used for pump station cost. Friction loss in fittings and valves can be ignored when the pipe length is much greater than the pipe diameter. Pump station cost has less influence than operating cost in determining the optimum diameter.