Award Winning Water Operations Optimisation Software

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Award Winning Water Operations Optimisation
Software
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Agenda

• Introduction to Beca and
• an overview
• technical
  information
• The benefits achieved in existing installations
• Delivery methodology
• Discussion

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is a Spin-off from

• The Beca Group
• NZ based international consultant
• 2,000 employees
• Offices in 14 countries
• Multi-disciplinary engineering, project
  management and planning consultants
• An employee owned private unlisted company
• One of the top 100 consultancies worldwide
• An implementer of capital works of US1.0b/yr

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The Issue

• The UK water industry uses about 200M of
  electricity to pump water consuming 4400 GWh per
  year of electricity.
• More than 90 of this is used for pumping

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Typical Power Use in Water Distribution
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Pump Life-Cycle Costs
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Ltd

• Specialist company with expertise in
• Control systems design and programming
• Industrial and environmental automation
• Simulation, operations research, logistics
• Optimisation using computer modeling
• Derceto Inc. was incorporated in September 2002
  and is headquartered in San Francisco. It has
  been set up to handle US and Canadian operations.
• Derceto UK Ltd formed in June 2006 for UK
  operations
• Supplying business improvement solutions for
  real world problems

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Where came from.
Derceto
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Introduction to

• Where does the name come from?
• What does do?
• What are the benefits?
• Some examples of installations
• Technical information

was the Babylonian Goddess of water
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What does AQUADAPTsoftware do?

• Delivers water to customers as first priority
• Schedules pumps and valves for next 48 hours to
  achieve lowest cost
• Runs in real time, solves in minutes
• Interfaces to your SCADA
• Minimises energy costs
• Maximises energy efficiency of pumps
• Improves water quality
• Recalculates a new solution every 30 minutes,
  adapting to changing conditions

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Benefits of AQUADAPT software
installed
AQUADAPT takes maximum advantage of off peak rates
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Optimization Benefits
AQUADAPT has achieved 12 to 25 savings
Plus these additional benefits

• Makes operations more repeatable and predictable
• Improved turn-over of water
• Smoothed outflows from plants
• Improves pump efficiency and optimal discharge
  pressure
• Reduced greenhouse gas footprint

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Benefits of AQUADAPT
Moving load to cheaper tariffs savings
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Benefits of AQUADAPT
Led to a 8 energy reduction to shift the same
volume of water for EBMUD
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Benefits of
which leads to substantial dollar savings
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Reference Projects New Zealand

• Wellington 150 MLD (40 MGD) from two well
  fields and a filter plant into 11 pressure zones
• Installed June 2000

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Reference Projects New Zealand
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Reference Projects New Zealand
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Reference Projects USA

• East Bay Municipal Utility District
• Services 1.3 million people
• AQUADAPT controls 1/3rd of system
• 20 pump stations, 66 pumps, 28 reservoirs
• One treatment plant, one back-up supply plus
  numerous transfers between zones
• 2.6M annual energy costs
• AQUADAPT installed June 2004
• Year 1 12 savings of 370,000
• Year 2 13 savings
• Year 3 13.6 savings

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US Clients
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Created using standard modules

• Modules
• Demand forecasting
• Storage tanks
• Pump stations
• Water treatment plants
• Power tariffs and network charges
• Scada interfaces

Maximum Efficiency Surface for multiple fixed
speed Pumps
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Demand Forecasting
Substantial variations in daily demand occur for
this Australian utility
adapts in real time to achieve high accuracy
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Demand Forecasting

• Use existing forecasting systems if they exist
• Otherwise
• Uses seasonal standard seasonal demand profiles
  for every major demand point in the system
• Derceto uses existing telemetry to read storage
  tank levels and flows to calculate actual demand
• Adapts the size and shape of the standard demand
  profile in response to actual demand
• Derceto automatically compensates for any errors
  in data and instruments using the Data Cleaner

DEMAND
SUPPLY

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The Data Cleaner
Here the data cleaner corrects missing data for
nearly 6 hours during a communications blackout
and resynchronizes when the problem clears
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Pressure Zones

• AQUADAPT can control
• Altitude valve controls
• Flow control filling (open and closed loop)
• Booster pump filling off transmission main
• Floating storage tanks (no inflow control)

AQUADAPT is very good at filling terminal
floating storage tanks, using optimised pressure
settings
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repeats the calculations for

• Flow rate into storage tank
• Energy used by pump
• Efficiency of pump ()
• Pressure in the zone
• Price per delivered volume
• Using a hydraulic model enables AQUADAPT to make
  accurate control predictions, avoiding the common
  problem of chasing ones tail where changing one
  setting disrupts all other flows and pressures.

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Water treatment plants
AQUADAPT handles

• multiple parallel plants
• Surface water plants, raw water intakes
• Well field water plants
• Run-of-River plants
• Minimum and maximum production flows
• Flow ramp up / down limits
• Chemical and power costs
• Aquifer recharge times

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Water treatment plants

• AQUADAPT takes maximum advantage of each source
  of water within their constraints
• Well fields have capacity limits but are fast to
  start up and stop
• Lake or reservoir supplied plants may prefer
  reasonably constant flows
• River plants can be limited
• long term e.g. due to drought,
• short term e.g. due to turbidity

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The clear water tank levels are kept within
desired limits
Aquadapt shows the operator the flow set-point
for the next 24 hours
AQUADAPT schedules plant
production
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Pumps

• AQUADAPT has modules to handle
• Fixed speed pumps
• Variable speed drives
• Manual scheduling of pumps (on or off)
• Multiple pumps into a common line
• Pump priority
• Limiting starts per hour
• Gas/Diesel pumps

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Pumps
AQUADAPT controls a storage tank with a dedicated
pump or flow control valve easily
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Pumps

• AQUADAPT handles a pump station shared between
  two storage tanks

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Pumps
AQUADAPT handles cascade storage tanks with pump
stations between pressure zones (unlimited levels)
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AQUADAPT targets the pump Best Efficiency Point
(BEP)
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AQUADAPT chooses the best pump combinations
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Pumps variable speed drives
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Pumps
When many variable speed pumps operate in
parallel even more calculations are needed
Multiple pumps in parallel need special rules to
achieve energy efficiency
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Other Constraints

• maintains minimum
  storage requirements and can change these
  seasonally or by fire risk
• maintains pump
  station minimum and maximum flows
• can also be
  programmed to maintain or limit system pressures
  at any number of audit points, even without
  instruments
• can be programmed
  to keep within flow limits for individual pipes
  in the transmission network

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Energy Tariffs

• Every point of supply can have its own unique
  electricity and demand tariff structure
• Half hour resolution on kWh and kW price
• AQUADAPT handles any combination of energy
  supplier with any network (lines) provider
• Complex electricity sell-back or
  standby-generation schemes can be incorporated
• AQUADAPT handles mixed mode pump stations e.g.
  gas engine and electric motor driven pumps

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Energy tariffs

• Real Time pricing can be used (with live
  updating)

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Washington Suburban, Maryland

• Serves 1.6 M people
• 57 Storage Tanks
• 15 Pressure Zones
• 18 Pump Stations
• 112 Pumps (max 81 running)
• 25 Remote Controlled Flow Valves
• Uses Real Time Energy Market

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AQUADAPT forecasts energy consumption
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..so hedging contracts can be set up
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Real time markets can be best
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HOW EACH APPLICATION INTERACTS
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A pressure zone on the Operator Panel
Actual demand profile from telemetry
Yellow bar Indicates current time
Light green is Projected demand profile
Actual and predicted level
Green lights indicate pump scheduled to run
Electricity tariff band summary, Orange peak,
green off-peak
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AQAUADAPT Dashboard provides a management view
into the optimiser
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The Outcome

• AQUADAPT takes into account all of the costs,
  constraints, efficiencies, water turn-over
  requirements and manual settings
• AQUADAPT calculates the mass balance first
  delivery of water to meet demand is No. 1
• AQUADAPT calculates which source of water to use
  to minimize costs
• AQUADAPT calculates pump schedules to minimise
  energy costs and maximise efficiency
• AQUADAPT uses the most efficient combination of
  pumps in parallel pump sets

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Safety considerations
AQUADAPT provides three safety levels

• AQUADAPT confirms that decisions are safe using a
  hydraulic model
• The control system uses over-ride controls
  slightly above and below AQUADAPT levels
• The field controls have limits which prevent
  over-filling of storage tanks, and start filling
  automatically on low level

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Implementation plan

• Two studies are carried out
• Phase 1 Simple overview study to confirm if
  AQUADAPT is suitable for the distribution system,
  preliminary cost/benefits calculated (8 weeks)
• Phase 2 Detailed study, we will present the
  results including the price and indicative cost
  savings that can be achieved (12 weeks)
• Leading to
• Phase 3 Implementation (6 9 months)
• Payback periods typically less than 2 years,
  sometimes less than 1 year!

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AQUADAPT is in operation at

• East Bay MUD, Oakland CA, (1.2M customers)
• Washington Suburban Sanitary Commission, MD, the
  5th largest US utility and operating under the
  real-time electricity market (1.7M customers)
• WaterOne of Kansas City (450,000 customers)
• Eastern Municipal Utility District (670,000)
• Maroochy Water in Queensland, Australia
• Wellington, New Zealand (the Capital City)

They welcome phone calls and visitors
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Summary of this presentation

• AQUADAPT pays for itself rapidly
• AQUADAPT is an online real-time solver, it copes
  with imperfect real-world requirements
• AQUADAPT has been developed by one of the worlds
  top 100 engineering consultants
• AQUADAPT is available right now, allowing rapid
  implementation for faster pay-back

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Available now