Enhancing Our Future Outcomes Chris Ames Dean FitzGerald Agenda - - PowerPoint PPT Presentation

Enhancing Our Future Outcomes

Chris Ames Dean FitzGerald

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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

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DCWW and AMP6

DCWW Modelling resource:

• 3 Central Modellers
• 6 Network Analysts located in 6 distribution areas.

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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.

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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.

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AMP5 Tynywaun

• Modelling assessment of all mains
• Customer contact details past and present collected
• Operational network knowledge applied

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.

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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.

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.

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Optimisation Tynywaun

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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: Average output of Tynywaun WTW down 25% to 6Mld Reduced customer contacts Simplified network Reduced leakage / unaccounted for water Efficient network management through data with better control and monitoring.

0.00 50.00 100.00 150.00 200.00 250.00 300.00 350.00 400.00 450.00 500.00

AvDF m3/hr July - December 2013

Tynywaun WTW Outlet

10 Analysis and review highlights:

• Customer service - contacts down
• Compliance – bacti failures zero
• Cost – TOTEX savings up to £150,000 per annum.

Review and Outcomes

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.

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Enhancing Our Future Outcomes

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.

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.

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Questions

Questions? Distribution Zonal Studies – Enhancing our future outcomes