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Operation of Centrifugal Pumps

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Centrifugal Pumps

Abstract

Reliable pump performance can be achieved only if the pump is well integrated into the system. This implies the implementation of adequate controls which ensure that the pump operates in the range between the allowable minimum and maximum flow – in particular if pumps are operated in parallel. Proper procedures must be implemented for start and stop. Transient operation and unsteady phenomena which need attention include: dynamic instabilities caused by an unstable Q-H-curve, water hammer and air-drawing vortices in wet pump installations. Suction pressure transients and distorted approach flow to the pump harbor also potential for trouble. Operation in various brake and turbine modes is discussed in chap. 12. The effects of high viscosity, free gas or large amounts of solids on the performance curves are the topic of chap. 13.

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Notes

  1. 1.

    For a discussion of extremely fast starting transients as encountered in rocket pump applications, refer to [1].

  2. 2.

    The actual figures quoted in the following originate from tests reported in [12, 13, 20]. This information serves for illustration only and is scarcely generic.

  3. 3.

    The correlations in Table 11.3 originate from measurements in specific test stands. Information on the relevance of these correlations in practice is not is available.

  4. 4.

    At extremely high flow rates in excess of Q=16.7 m3/s=60’000 m3/h the limit of the recommended velocity cT=1.7 m/s is exceeded.

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  1. Villeneuve, Switzerland

    Dr. Ing. Johann Friedrich Gülich

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  1. Dr. Ing. Johann Friedrich Gülich
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Correspondence to Johann Friedrich Gülich .

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Gülich, J. (2014). Operation of Centrifugal Pumps. In: Centrifugal Pumps. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40114-5_11

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  • DOI: https://doi.org/10.1007/978-3-642-40114-5_11

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