A Clean Water Agency

1
Energy Program Update
Presented to the Environment CommitteeJanuary
27, 2009
Jason Willett, Chair, MCES Energy Team
A Clean Water Agency
2
Background 2006

• Energy team created by MCES General Manager Bill
  Moore
• Goal 15 percent energy reduction of purchased
  fossil fuel (2010 compared to 2006)

3
Status of Initiatives

• Energy Conservation
• Renewable Energy
• Energy and Carbon Measurement
• Energy Cost Savings and Financial Issues
• Energy Collaborations

4
1. Energy Conservation

• The cheapest energy is the energy you dont use.

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Energy Conservation and Efficiency

• Overview
• Process efficiency, lighting redesign, and
  facility re-commissioning
• Completed 26 energy-related studies identifying
• 40 energy saving opportunities totaling 46
  million kWh (3 million/year) of those, MCES
  implemented 16 measures to date 23 million kWh
  (1.4 million/year)
• 24 more studies planned in 2009

6
Energy Conservation and Efficiency

• Completed work
• Metro Aeration study
• Annual kWh savings 6,700,000
• Metro Enhanced maintenance in aeration process
• Annual kWh savings 4,000,000

7
Energy Conservation and Efficiency

• Completed work
• Metro Odor control energy improvement
• Annual kWh savings 688,000
• Metro Instrument air compressor modifications
• Annual kWh savings 340,000

8
Energy Conservation and Efficiency

• Completed work
• Blue Lake Refurbished secondary aeration system
• Annual kWh savings 3,000,000
• Seneca Refurbished secondary aeration system
• kWh savings 899,000
• Facility re-commissioning on eight facilities
• Annual kWh savings 250,000

9
Energy Conservation and Efficiency

• In process work
• Metro Tunnel lighting redesign
• 2008 design 2009 construction

10
Energy Conservation and Efficiency

• In process work
• Metro Liquids Business Unit Operating Changes
• 50 percent reduction sludge pump run hours
• 8,000 annual hour reduction in grit collector
  drives
• Less double pumping of sludge
• Annual kWh savings 3,000,000
• Metro Steam Trap Program
• 15 completed in 2008 remainder scheduled for
  2009

11
Energy Conservation and Efficiency

• In process work
• Rosemount Decommissioning
• Annual kWh savings 1,500,000 (net)

Rosemount Plant, 2008
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Energy Conservation and Efficiency

• In process work
• Energy design standards for capital projects
• Employee energy campaign
• 1,800 computers reconfigured to go into low
  energy state after inactivity
• Printer default is two-sided copies
• Employees to shut down computers and electronics
  when not in use

13
Energy Conservation and Efficiency

• Identified additional energy efficient
  improvements
• Seneca New energy efficient HVAC system
• Blue Lake New energy efficient HVAC system
• Lift Station L-35 Energy efficient lighting
• Lift Stations L-74, L-75 Efficient motors

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2. Renewable Energy

• Renewable energy can make us energy-independent
  and energy-secure.

15
RD and Renewable Energy

• Completed RE
• Fluidized Bed Incinerators/ cogeneration of heat
  and electricity

16
RD and Renewable Energy

• Completed RE
• Eagles Point Thermal energy recovery from
  effluent

17
RD and Renewable Energy

• In process RE
• Empire Micro-turbine demo project

18
RD and Renewable Energy

• In process RE
• Blue Lake Design of liquids process change to
  anerobic digestion and substitution of produced
  biogas for purchased natural gas
• Metro Heat Pump
• 2008 Study on energy savings opportunities from
  heat pump and heat recovery technologies
• 2009 Initiating installation of non-condensing
  turbine/generator
• Seneca New scrubber heat exchanger

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RD and Renewable Energy

• Identified RE possibilities
• Algae RD
• Bio-diesel from brown grease

20
RD and Renewable Energy

• Identified RE possibilities
• Metropolitan CountiesEnergy Coalition(MCEC)
  Wind Initiative
• Xcel Energy and MCES Renewable Collaboration,
  possible solar farm at Blue Lake

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3. Energy and Carbon Measurement

• You cant manage what you cant measure.

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Energy and Carbon Management

• In process work
• Energy database
• EPA and Energy Star Program
• GHG Emissions Research
• The Climate Registry (TCR) reporting

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4. Energy Cost Savings and Financial Issues

• MCES spent 17 million on energy in 2008.

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Energy Cost Savings and Financial Issues

• Completed work
• Carbon costing for alternatives analysis
• Solar facilities economic analysis
• Rebates earned in 2008 225,000
• Peak Control Agreement savings in 2008 350,000

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Energy Cost Savings and Financial Issues

• In process work
• Lift station tariff analysis and charges
• Xcel Energy rate case
• Monetization of emission reduction projects
• FBI turbine accreditation and penalties
• Peak Control Agreementsreview

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5. Energy Collaborations
27
Energy Collaborations

• University of Minnesota (Institute for Renewable
  Energy Environment)
• Xcel Energy (Process Efficiency Program RE)
• Metro Energy Policy Coalition (Counties)
• Inter-agency Energy Environment Team
• Chamber of Commerce

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Summary

• Conservation
• 66 of goal complete
• Over 100 of opportunities identified
• More studies underway
• Renewable energy
• Additional possibilities being investigated
• Financial impact

1.4 million/year conserved .3 rebates
received (2008) .3 peak control savings
(2008) 2.0 million