Energy Management at DMWW ISO 50001 – Better Plants - SEP Iowa Industrial Energy Group Spring Conference October 11, 2016 Thank you – It’s a pleasure to have the opportunity to update you on Energy Management. Please feel free to ask questions at any time.

DMWW History Established in 1871 – 2 mgd

Fleur Drive Water Treatment Plant – 80 mgd DMWW Facilities Fleur Drive Water Treatment Plant – 80 mgd

McMullen Water Treatment Plant – 20 mgd DMWW Facilities McMullen Water Treatment Plant – 20 mgd

Saylorville Water Treatment Plant – 10 mgd DMWW Facilities Saylorville Water Treatment Plant – 10 mgd

Aquifer Storage & Recovery DMWW Facilities Aquifer Storage & Recovery

Over 30 Additional Brick & Mortar Locations DMWW Facilities Over 30 Additional Brick & Mortar Locations 32 brick & mortar facilities

Red line in energy – left y axis Green line is pumpage – right y axis Pumpage in 2013, 2014, & 2015 was down but energy costs remained constant.

History With MidAmerican Energy 2004 - MidAmerican Energy Audit Internal pump antifriction coatings Lighting upgrades HVAC upgrades GOF OCC lighting controls Numerous premium efficient motors & VFDs DMR 1750hp VFD History: 1980s – Looking at demand rates and trying to control 1990s – Lighting and efficient motors 2000s – Slide text

History With MidAmerican Energy 2013 - MidAmerican Energy Partner 2013 - Energy Audits of FWTP, MWTP, & GOF Additional lighting upgrades Operational changes Reduced winter heat setpoints in unoccupied areas Lower compressed air pressure Consistently maintain plant pumping operations at the minimum required pressure

2000 – 2014 – Same pumpage but a 26% increase in energy cost?

2014 Des Moines Water Works joins DOE Pilot Program to implement ISO 50001 and Superior Energy Performance Water and waste water systems use 2% of all energy in the US and by EPA estimates – adds >45 million tons of greenhouse gases annually.

PROVIDES ORGANIZATIONS WITH AN INTERNATIONALLY RECOGNIZED FRAMEWORK FOR IMPLEMENTING AN ENERGY MANAGEMENT SYSTEM (EnMS).

ISO 50001 Framework Develop an energy policy Develop targets and objectives to meet the policy Use data to better understand and make decisions about energy use Measure the results Review how well the policy works Continually improve energy management

Dr. W. Edwards Deming’s PDCA

DOE Resources & Tools Technical Support Training & Workshops EnMS Development ID Energy Saving Opportunities Developing & Tracking Performance Metrics Industrial Assessment Center Technical Account Manager

DOE Resources & Tools eGuide EnPI Tool Webinars Technical Guidance Docs Peer-to-Peer Networking

Accomplishments Learned energy management system basics Secured top management commitment Established an energy team Identified the scope and boundaries Defined an Energy Policy Created organizational awareness

Accomplishments Identified legal requirements Identified energy sources and uses Collected historical energy bills and other data Analyzed energy consumption and costs Determined significant energy uses Determined performance metrics

Accomplishments Creating Energy Manual Communicating with suppliers, contractors, and employees Participating in DOE sponsored training with other pilot program members Installed >50 electric submeters and integrated with SCADA

Accomplishments Audit utility bills in EAM Developed energy charts for the EAM Start Center Developing energy monitors for each treatment plant

EAM Start Center

EAM Start Center

2000 – 2014 – Same pumpage but a 26% increase in energy cost?

In Progress Identify energy efficiency opportunities Create and execute action plans Address training needs Establish operational controls Successfully pass 3rd party audit and receive ISO 50001 certification

Ongoing Considerations Measure, monitor, and analyze performance metrics Utilize EAM & SCADA for analytical tools Respond to deviations in energy performance Utilize EAM & SCADA to flag deviations Plan & conduct internal audits Take action to correct and prevent nonconformities

Ongoing Considerations Conduct management review of performance Recognize success and communicate results Take action to continually improve

Cost to date To date, operational costs total $28,000 Labor, training, books, etc. Two capital projects Install submeters - $110,000 Control Center energy monitors - $22,000

After ISO 50001 Certification Certification Program for Energy Performance Verification Transparent & Globally Accepted Establishes a Verification Protocol To Prove Energy Performance Improvements Originally Developed With Heavy Industry In Mind Around Thirty Companies Have Achieved Certification