Patent ID: 6776584
Filing Date: 2004-08-17
Classification: F04D

Abstract:
A method of determining the operating point of a centrifugal pump having a given hydraulic performance characteristic comprising the steps of:measuring at least two independent variables capable of determining the operating point of the pump by, measuring the two independent variables at least at a first pump rotational speed; measuring the two independent variables at least at a second different pump rotational speed; and processing the measured independent variables as measured at each speed to provide two sets of data indicative of the operating point of said pump, wherein the given hydraulic performance characteristic is obtained at both minimum and maximum continuous flow for a given impeller diameter of the centrifugal pump, and the flow (Q), total dynamic head (TDH) and pump efficiency (n) are used to compute the Brake Horsepower (BHP) by computing: BHP=Q*TDHK1*nwhere Q is the flow in gpm, TDH is the total dynamic head in feet, n is the pump efficiency, and, K1 is a constant depending on the unit conversion.