Patent ID: 9568921
Date: 2017-02-14
CPC Classifications: F04D,G05D

Claim:
1. A method for approximating a static head of a fluid transfer system having a fluid transfer device, the method comprising: determining a rotational speed and a power consumption of the fluid transfer device; determining a first set of data points, wherein a data point of the first set represents a power consumption at a rotational speed; calculating a second set of data points based on the first set of data points, wherein a data point of the second set represents a rate of change of the power consumption at the rotational speed of the data point of the first set, wherein the rate of change of the power consumption is a function of the rotational speed; determining a selected rotational speed producing flow through the fluid transfer device based on the second set of data points; and approximating a static head based on the selected rotational speed, wherein determining the selected rotational speed comprises: for each data point in the second set: