Abstract
A positive displacement pump delivers at a fixed speed a nearly constant flow rate independently of the back pressure. In contrast, the flow rate of a centrifugal pump depends on the pressure difference Δp =ρ×g×HA imposed by the system on the pump. The pressure rise Δp generally depends on the flow rate because of hydraulic losses. Thus the system characteristic HA = f(Q) is understood as the difference in total pressure which must be supplied by the pump to maintain a specific flow rate through the system, Eq. (T 2.2.6). The operation point of a centrifugal pump is given by the intersection of the characteristics of system and pump, Fig. 11.1.
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(2008). Operation of centrifugal pumps. In: Centrifugal Pumps. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73695-0_11
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