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The Strategic Energy Management program’s purpose is to improve efficiency, lower cost, and reduce environmental impact. The program has achieved its goal of reducing electricity and natural gas use by 5% per year for four years. These reductions were made possible through process changes and minor capital project expenses.

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Model

In cooperation with Energy Trust of Oregon, Energy350, and the City of Albany started in 2014 by developing a model to accurately benchmark progress:

energy model wwtp(click to enlarge graph)

Projects

energy equip

Staff identified potential projects and processesand started tracking their progress in accordance with the model:

  • HVAC systems/temperature adjustments
  • Lighting fixtures in/on buildings
  • Hot water heaters
  • W3 pressure adjustments
  • Shutting down redundant Variable Frequency Drives (VFD)
  • Pumping scheme adjustments
  • Adjusting aeration in VLRs
  • Adjusting chlorination, mixing

Council also approved $475,000 for 3 energy projects in the Capital Improvement Program to occur between 2018-2019:

ProjectCostIncentives ReceivedPayback PeriodCompleted
Repair leaking blower line $295,000 $119,000 3.5 years April 2018
Install “banana” mixers in aeration basins $200,000 $100,000 3 years October 2018
Install a VFD on 1 blower (250 hp) $60,000 $30,000 (anticipated)    

Results

The Albany Millersburg Water Reclamation Facility is saving 3,500 kWh per day on average.

This may continue to improve with the VFD project still in progress. That's equivalent to:

energy icon houses
Power for 117
U.S. homes

energy icon meter 1,280,000 kWh per year

energy icon money $96,000
per year

Actual Water Reclamation Facility Energy Performance

energy actual wwtp(click to enlarge graph)

Overall Power Cost

energy power cost(click to enlarge graph)

Overall Savings & Incentives at the Albany-Millersburg Water Reclamation Facility

ItemkWhIncentive/SavingsCost
SEM Program   $22,500  
Energy Saved to date 2.75 million $199,000  
LED Lighting   $14,000 $33,400
TWG Actuator   $4,500 $9,000
Blower Line Repair   $119,000 $295,000
Banana Mixer Installation   $100,000 $200,000
Blower VFD Installation   $30,000 $60,000
Total   $489,000* $597,400

*Will continue to save approximately $96,000 annually in power costs.