Adjustable Speed Pumping for Irrigation Networks

by John R. Roth, US Bureau of Reclamation, Engineering, & Research Cent, Denver, CO, USA,

Document Type: Proceeding Paper

Part of: Water for Resource Development


Adjustable speed technology can be an economically viable method of accommodating the significant fluctuations in flow and pressure produced by certain irrigation networks. Combinations of adjustable and fixed speed units can be selected for maximum coverage of the system's operating hydraulic conditions. Pump control is based directly on individual delivery pressure and total system pressure trends. Operating and contol strategies provide protection of pumping units while meeting system requirements or transitioning between steady states. Development of system probable pressure allows estimation of annual pumping costs for economic comparisons.

Subject Headings: Pumps | Irrigation | Economic factors | Hydraulic design | Irrigation systems | Pressurized flow | Hydraulics | Steady states

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