×

Variable speed multi-pump application for providing energy saving by calculating and compensating for friction loss using speed reference

  • US 10,132,305 B2
  • Filed: 01/07/2015
  • Issued: 11/20/2018
  • Est. Priority Date: 01/07/2014
  • Status: Active Grant
First Claim
Patent Images

1. A pump system comprising:

  • a constant pressure control model having a logic, comparator or proportional integral derivative (PID) controller and a pump model having one or more running pumps, the logic, comparator or PID controller configured to respond to set point signaling and provide speed signaling, the pump model configured to respond to the speed signaling and operate the one or more running pumps operating at a substantially constant discharge pressure; and

    a pump system logic controller having a signal processor or processing module configured torespond to the speed signaling, and also to user input signaling containing information about a set point and a speed related to running the one or more pumps in the pump system, anddetermine the set point signaling containing information about an adjustment to the set point to compensate for system friction loss and maintain the substantially constant discharge pressure of the pump system for a flow variation using an interpolation based on a relationship between a minimum set point for a minimum speed and a maximum set point for a maximum speed so as to find a value of an adjusted set point for the speed in order to maintain the substantially constant discharge pressure of the pump system, in response to the speed signaling and the user input signaling received.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×