Power of the Pump

South Windsor, Conn.'s Veterans Memorial Pool Park, known by locals as the “Spring Pond,” includes three public pools. To save energy, more than 1 million gallons of pool water are filtered according to use rather than 24/7. Photos: Brian Robinson, FlowTech Inc.

By retrofitting its pool's three-phase pump system with electrical controls, the South Windsor (Conn.) Public Works Department saved $7,000 on energy bills in one season.

The above kilowatt readings show energy usage of South Windsor's pool filter pumps during a seven-day period after the town's public works department installed variable-frequency drives (VFDs) to control motor speed. The upper right portion, labeled “VFDs in bypass,” simulates the power consumption level prior to VFD installation. Source: Brian Robinson, FlowTech Inc.

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