Water and Energy Efficiency in Municipalities: Successful, FieldTested WATERGY Approaches

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Water and Energy Efficiency in
MunicipalitiesSuccessful, Field-Tested WATERGY
Approaches
Brian T. Castelli Executive VP COO Alliance to
Save Energy
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WHAT IS WATERGY? A Quick Snapshot

• Helping cities distribute water and treat
  wastewater efficiently,
• saving energy, water and money.
• WHY IS THIS IMPORTANT?
• ? Every liter of water that passes through a
  system has a significant
• energy cost, compounded by the money
  invested to produce it.
• ? Water supplied that is lost 1/3 to ½ in
  developing countries
• AND ITS COST EFFECTIVE
• ? Rapid Payback generally ranges from
  immediate to 2 years
• ? Huge Savings low-cost measures shave
  energy by at least 20
• much higher
  possible with larger investments
• ? One of very few options available for
  cost-effectively meeting current
• shortfalls and growing demands for
  electricity, water sanitation.
• ? Reduces the need for new infrastructure

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Water Efficiency Measures

• The most cost-effective
• Watergy interventions
• ? Pumping
• ? Leak Management
• ? Automation
• ? Metering Monitoring

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Performance Contract FinancingApplied to Water
Supply Emfuleni, South Africa
PROBLEM 80 of water flowing to homes lost
through leaking plumbing fixtures Enough to
fill 2 Olympic-size swimming pools every hour!
RESULTS Payback period lt3
months Annual Cost Savings US 3.8
million Annual Water Savings 8 million
kL gt30 reduction! Annual Energy Savings
gt14 million kWh Annual GHG Emissions avoided
12,000 tonnes Demonstrated performance
contracting applied to water
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Typical Watergy Approaches Veracruz City,
MEXICO
ISSUES ? Energy was second highest cost for
water utility (SAS) ? Sporadic service -
severe interruptions common APPROACH - Pilot in
Volcanes sector Analysis by Sectoring
Optimized pressure flow Leak
detection SCADA system Variable
frequency drive RESULTS Energy Saved 25
million kWh/year (24 ?) Cost Saved
US394,000/year Improved reliability
once frequent complaints eliminated
Substantial water savings due to pressure control
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More Households Connected with Same
WaterFortaleza, BRAZIL

• ISSUES
• System over-designed
• Inefficient pumps, OM, system management
• Many households not connected to service
• APPROACH
• Improved data collection analysis
  System automation
• Rewinding and replacing motors
  OM manual for staff
• RESULTS
• 88 million kWh saved over 4 years
• 88,000 new connections for the poor using same
  amount of water
• 2.5 M saved every year w/investment of only
  1.1 M
• Payback 7 months

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Meeting Growth with Same Water TIJUANA, MEXICO
ISSUES Water from other side of mountains
Rapid growth gt20,000 households/yr APPROACH
? SCADA telemetry, peak demand management
? Shifted water sources so much less coming over
mountains RESULTS (so far) 5.7 million kWh
saved every year Efficiency and the shift
in water source saved 1.8 million
allowing water to be provided to 38,500 new
households (over 2 yrs) with only slightly
higher water production. Water losses one
of the lowest in Mexico won natl award in 2005
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Continual Water Supply in Arid Region
MONCOLOVA, MEXICO
ISSUES Water provided only 6 hours every 3
days! 48 losses from system APPROACH ?
Managerial operational improvements ? Leak
detection ? Variable speed drives RESULTS -
For Pilot Sector Only Service in pilot area
now 24/7! 20 ? in water losses Water
Saved 10 million m3/yr Energy Saved 6.5
million kWh/yr Cost Saved (energy) 1.2
million Monclova Water Utility Now Cost Sharing
Further Improvements!
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• Watergy/Mexico Contacts
• Arturo Pedraza
• apedraza_at_ase.org
• (Puebla, Mexico)
• Alexander Filippov
• afillipov_at_ase.org
• (Washington, D.C.)
• www.watergy.org
• www.watergymex.org