Search results with tag "Variable speed pumping"
Collection Systems Technology Fact Sheet: Sewers, Lift Station
www3.epa.govVariable speed pumping is often used to optimize pump performance and minimize power use. Several types of variable-speed pumping equipment are available, including variable voltage and frequency drives, eddy current couplings, and mechanical variable-speed drives. Variable-speed pumping can reduce the size and cost of the wet-
Wastewater Technology Fact Sheet: In-Plant Pump Stations
www3.epa.govVariable-speed pumping may allow a given flow range to be achieved with fewer pumps than would a constant-speed alternative. Variable-speed stations also minimize the number of pump starts and stops, reducing mechanical wear. Although there is a significant energy saving
VARIABLE SPEED PUMPING - Energy
www1.eere.energy.govWhen a pump is installed in a system, the effect can be illustrated graphically by superimposing pump and system curves. The operating point will always be where the two curves intersect. Flow Rate Head SYSTEM CURVE PUMP CURVE OPERATING POINT Flow Rate Head PUMP CURVE OPERATING POINT SYSTEM CURVE 3 Many pumping systems require a variable …
VARIABLE SPEED PUMPING - Department of Energy
www.energy.govExecutive Summary Introduction Pumping systems account for nearly 20% of the world’s energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial