Long-term availability modelling of water treatment plants
Roland Smith (Student TU Delft, Waternet)
Jasper van de Loo (Student TU Delft, Waternet)
M. van den Boomen (TU Delft - Civil Engineering & Geosciences)
N. Khakzad (TU Delft - Technology, Policy and Management)
Geert Jan van Heck (Student TU Delft, Waternet)
A.R.M. Wolfert (TU Delft - Civil Engineering & Geosciences)
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Abstract
Water treatment plants (WTPs) are characterised as complex configurations of repairable and deteriorating components. Previous studies have mainly focused on the average or steady-state availability of such systems while ignoring inherent characteristics like degradation. The current research proposes a two-level hierarchical model for long-term availability analysis of WTPs. To do so, at the component level, a condition-based technique (semi-Markov) or a failure-based technique (non-homogeneous Poisson process) is proposed based on the type and amount of available data while at the system level a reliability block diagram can be used to combine the component-level availabilities. The application of the methodology has been demonstrated on a real case study in the Netherlands.
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