Pump system Characteristics:
In energy conservation programs for pumps, the performance characteristics of the pump must be available to pinpoint the location of the operating conditions in the curve and determine if there are alternative schemes to lower the power consumption. The standard convention for dynamic (centrifugal) pump is to draw the pump performance curves showing flow on the horizontal axis and head generated on the vertical axis. (Refer to the figure below for a typical pump curve)
When a pump is installed in a system the effect can be illustrated graphically by superimposing pump and system curves. The operating point will always be where the two curves intersect. This operating condition must be located within the region in the curve so that a slight deterioration of head will improve the pump efficiency, not worsen it.
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