Variable Speed Pump Energy Optimization via Static Head Adaptation

The patent applies dynamics by transitioning from fixed-speed to variable-speed pump operation. The pump speed is dynamically adjusted based on the current operating conditions, specifically the static head and flow rate requirements. This allows the pump to adapt its performance characteristics to match the changing system demands, thereby reducing energy consumption while maintaining adequate fluid level control.

The patent utilizes parameter changes by modifying the pump's rotational speed parameter in response to changing static head conditions. By varying the speed parameter rather than maintaining a constant fixed speed, the system can optimize energy efficiency across different operating points. The control system adjusts the speed parameter based on measured or calculated system characteristics.

The patent applies copying by creating a virtual model or representation of the system characteristics rather than directly measuring all physical parameters with sensors. Instead of installing flow sensors to directly measure flow rate, the system uses a model that calculates flow rate and energy consumption characteristics based on pump performance curves and measured parameters like power consumption and static head. This virtual copy allows optimization without the complexity of additional physical sensors.

The patent replaces the mechanical measurement system (flow sensors) with a computational approach. Instead of using physical sensors to detect flow characteristics, the system substitutes mechanical measurement with mathematical modeling and calculation based on electrical parameters (power consumption, voltage, current) and pump performance characteristics. This substitution eliminates the need for additional mechanical sensing hardware while achieving the same optimization goal.

The patent resolves this contradiction through dynamic speed adjustment. The pump operates at variable speeds matched to the actual demand rather than running continuously at full capacity. During normal operation, the pump speed is reduced to match lower flow requirements, maintaining reliability while significantly reducing energy consumption. When peak demands occur, the speed can be increased to meet the higher requirements.

The patent applies partial action by operating the pump at less than its maximum capacity during normal conditions. Rather than always running the oversized pump at full power, the system uses only the portion of the pump's capability that is currently needed. The excess capacity remains available but is not continuously utilized, thereby avoiding the unnecessary energy consumption that would result from operating an oversized pump at full power during normal operation.