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How do you find the operating point of a pump?
What is the operating point? By plotting the pump and system curves on the same graph (Figure 2b), the intersection of the lines identifies the flow rate you can expect from the pump in this configuration. This intersection is called the operating point.
What is system curve for pump?
A system curve, as shown in Figure 2, is a graphical representation of the pump head that is required to move fluid through a piping system at various flow rates. The system curve helps quantify the resistance in a system due to friction and elevation change over the range of flows.
How is the operating point of a pump and piping system determined?
The point at which a pump operates in a given piping system depends on the flow rate and head loss of that system. For example, in Figure 10, the operating point for the centrifugal pump in the original system is designated by the intersection of the pump curve and the system curve (hLo).
How do you specify a pump?
Pump types Before you purchase a pump, you must specify the type of pump and make sure it is capable of delivering a given flowrate at a given pressure. There are two main pump types: rotodynamic and positive-displacement. In a rotodynamic pump, a rotating impeller imparts energy to the fluid.
What is the best operating point of a pump?
Like the terms Shut-off (SO) or Run-out (RO), the Best Efficiency Point identifies an operating region or point along the pump performance curve. The Best Efficiency Point is defined as the flow at which the pump operates at the highest or optimum efficiency for a given impeller diameter.
How do you use a pump performance curve?
To read the curve, find a point on the bottom horizontal axis, which represents GPM (Gallons per Minute). Draw an imaginary line from the 1GPM dash straight up to where the 1GPM line hits the pump curve.
What does the best operating point represent?
Where is the operating point of a pump?
The proper pump can be selected by combining the System Curve and the Pump Curve: The operating point is where the system curve and the actual pump curve intersects.
How is the system curve of a pump calculated?
At each flow rate, the pump head that is required to overcome the system resistance and elevation change at that flow rate is calculated. After the model is run several times over a range of flow rates, it is the resulting pump head requirements at each given flow rate that will be plotted in order to generate the system curve.
What is meant by a ” system curve “?
What is meant by a “system curve” that is used to determine the operating point of a pump. I know what a “pump curve” is, but I often hear about a “system curve” being generated so that the pump operating point can be determined by where the pump curve and system curve intersect.
How can I find out where my pump is operating?
To determine where your pump is really operating, you will need to calculate the pump performance curve in the field “as is.” First, obtain a copy of your pump performance curve as published or purchased.