Discussion on the acceptance criteria for physical model testing of intake pumping stations.

Suzanna Zwanenburg, Femke Verhaart, Anton de Fockert

Friday 3 july 2015

11:30 - 11:45h at Africa (level 0)

Themes: (T) Special session, (ST) Design of intake stations

Parallel session: 15D. Special session: Design of intake stations

The ANSI/HI 9.8-2012 (HIS) is an internationally accepted standard, which provides guidelines and acceptance criteria for the design and testing of intake pumping stations. Besides HIS, also other standards are available like TSJ-S002 (2005). Comparing the acceptance criteria of the different standards, it can be concluded that the feed flow towards the pumps is not consistently judged. For example, where HIS allows a limited pre-rotation angle for proper pump feeding, TSJ-S002 (2005) judges the influence of pre-rotation insignificant for proper pump operation. A scientific basis for the different approaches to the acceptability of the feed flow is not found in literature. Furthermore, the acceptance criteria can be interpreted in multiple ways. The experimental research of Verhaart et al (2014) and de Fockert et al (2014) showed that the acceptability of the feed flow is dependent on the interpretation of the acceptance criteria. In this presentation the drawbacks of the current acceptance criteria will be discussed and ideas to develop new guidelines will be presented. These new guidelines should be based on the relation between the measured phenomena in a model and the performance of the prototype pump.