Enhancing Our Future Outcomes Chris Ames Dean FitzGerald
Agenda • DCWW and AMP6 • AMP 5 – Lessons learnt and solutions • Example Case Study – Tynywaun System • Review – future outcomes • Enhancing our future outcomes for AMP 6 • Questions 2
DCWW and AMP6 DCWW Modelling resource: • 3 Central Modellers • 6 Network Analysts located in 6 distribution areas. 3
AMP 5 AMP5 Modelling Framework partners: Modelling targets for AMP5 were trunk mains coverage and identified distribution areas: Known issues and optimisation potential Network configuration and expansion potential. And generally: Expert knowledge and understanding of our network to face the challenges of AMP 6. 4
Example Case Study - Tynywaun System Tynywaun is fed from Llyn Fawr reservoir: • 3 parallel trunk mains • 3 Service reservoirs • 5 Pumping stations • Supplies 13,000 properties • 81km of distribution mains. • mixture of cast iron and MDPE Rhondda Fawr facts: • 1578 Rhys Meyrick • 1851 coal discovered • 1909 Llyn Fawr excavated. 5
AMP5 Tynywaun Dealing with past AMP legacy • Post section 19 work between 2008-2010 left behind performance issues • Shut/buried/missing valves • Missing cross connections • Sections of mains not refurbished. • Water quality issues on 15” cast iron main and through network • Non sustainable network configuration • Stretched raw water resource with no expansion option available. • Modelling assessment of all mains • Customer contact details past and present collected • Operational network knowledge applied 6
Modelling Tynywaun Modelling report recommendations and conclusions: • Network restrictions • GIS anomalies • Metering issues • Leakage • Unnecessary assets. First example of DCWW being able to take a whole network model and working with operations addressing the wider issues of the network. 7
Optimisation Tynywaun This resulted in a model of the Tynywaun system that: • Created high and low pressure systems • Allocated demand more evenly across the three trunk mains • Reduced demand on 15” cast iron main to control discolouration events • Increased pressure management to 92% of the whole network • Enabled 2 service reservoirs to be removed • 1 water pumping station removed • Interconnection of two networks • The ability to feed further down network. 8
Actions and Results Through the installation of: 1x10” sluice valve, 7 PRV’s, 3 FH’s and 2 cross connections This enabled Operations to achieve all of the theoretical optimisations applied to the model. Results: Tynywaun WTW Outlet Average output of Tynywaun WTW 500.00 450.00 down 25% to 6Mld 400.00 Reduced customer contacts 350.00 AvDF m 3 /hr 300.00 Simplified network 250.00 200.00 Reduced leakage / unaccounted for 150.00 water 100.00 50.00 Efficient network management 0.00 through data with better control and July - December 2013 monitoring. 9
Review and Outcomes Analysis and review highlights: • Customer service - contacts down • Compliance – bacti failures zero • Cost – TOTEX savings up to £150,000 per annum. Next steps for future enhancement of Tynywaun system: • Recalibration of model • 15” main action plan – mains conditioning or abandonment • Utilising burst information with modelling to better understand impact of burst events on customer minutes lost. 10
Enhancing Our Future Outcomes This holistic approach is enabling the enhancement of our AMP6 Asset Strategy programme through Distribution Zonal Studies: • Water Quality Zone level • Analysis of all relevant data to that zone • Network understanding through modelling is key component • Ability to address our 3 C’s through modelling network reconfigurations • Risk assessment also key component of modelling. Enabling DCWW: • Prioritising poor performing areas • Targeted best value future Capital investment through a management strategy • Improved network performance and optimisation • Increased data cleansing and better network understanding of future risks • Improve network monitoring and accurate customer minutes lost reporting. 11
Questions Distribution Zonal Studies – Enhancing our future outcomes Questions? 12
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