US 11,668,594 B2
Methods for controlling pump flow rate based on pump flow rate estimation using pump head and performance curves and pump control systems having the same
Kalpesh Madhusudan Patel, Dhahran (SA); and Rohit Patwardhan, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Jun. 26, 2020, as Appl. No. 16/913,248.
Prior Publication US 2021/0404854 A1, Dec. 30, 2021
Int. Cl. G01F 15/075 (2006.01); G01F 25/10 (2022.01); F04D 15/00 (2006.01)
CPC G01F 15/0755 (2013.01) [F04D 15/0088 (2013.01); G01F 25/10 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A method for determining a pump flow (Q) of a pump, the method comprising:
calculating an inverse of a polynomial equation defining a DP-Q performance curve of a pump, wherein the inverse is a Q-DP polynomial equation defining the performance of the pump;
receiving a pump head (DP) value from a pump head sensor associated with the pump;
computing a pump flow based on the Q-DP polynomial equation;
comparing the computed pump flow to a preset target flow rate; and
automatically controlling a pump parameter of the pump such that the calculated flow rate becomes the preset target flow rate.