Navy Public Works Center San Diego Utilities Metering Program

1. Navy Public Works Center San DiegoUtilities Metering Program A Case Study for the FEMP/Alliance to Save Energy Seminar on Metering for Federal Officials 18 July 2002 John Thomas Navy Public Works Center San Diego Utilities Business Support Division Director

2. Topics NAVY PUBLIC WORKS CENTER SAN DIEGO • PWCSD background • Genesis of PWCSD metering program • Early efforts • Meter reading • Electrical Demand Avoidance Program • Demand-Interval (D/I) metering • Effective use of metering data • D/I Metering at Over-the-Horizon bases • Metering Lessons Learned/Conclusions

3. Synopsis NAVY PUBLIC WORKS CENTER SAN DIEGO • PWCSD has approx. 11,000 meters • - 5,879 electric (2,211 are D/I) • - 3,966 water • - 903 gas • - Some steam and compressed air • Annual utility costs ~ $150M to $200M • Most meters read manually • Meter data provided via web • Value of metering clearly demonstrated

4. PWCSD Background NAVY PUBLIC WORKS CENTER SAN DIEGO • Mission: Provide public works support and services to meet client needs • - Utilities • - Facilities maintenance and engineering • - Transportation • - Environmental • One of nine PWCs worldwide • Navy Working Capital Fund activity

5. Genesis of PWCSD Metering Program NAVY PUBLIC WORKS CENTER SAN DIEGO • Client satisfaction with utility provider • - Are services reliable? • - Are rates low? • - Are bills accurate? • Old policy • Meter some tenant facilities • “Engineered Estimates” for others • To PWCSD all facilities are tenant facilities • Disputes regarding estimates for unmetered facilities

6. Genesis of Metering Program (cont.) NAVY PUBLIC WORKS CENTER SAN DIEGO • Options • - Pay the bill at the main gate, don’t worry about who’s using what/where • - A definite upside – least first cost and easy • - Pursue metering of facilities • - Include costs of metering in PWCSD utility rates • - Start with the biggest users • - Recognize it will take time…

7. Genesis of Metering Program (cont.) NAVY PUBLIC WORKS CENTER SAN DIEGO • PWCSD Metering Policy: • - Meter facilities for electricity, water, and natural gas at the point of connection to the PWCSD distribution system. Evaluate metering of steam and compressed air on a case-by-case basis. • - Consistent with OPNAVINST 4100.5D

8. Early Efforts NAVY PUBLIC WORKS CENTER SAN DIEGO • “Throw it over the fence” • - Give entire task to contractors • - Didn’t work… • Not a core competency of most contractors • Is the meter properly installed? • Meters usually set by local utility

10. Early Efforts (cont.) NAVY PUBLIC WORKS CENTER SAN DIEGO • Need for specialized metering expertise was apparent • - PWCSD size/structure enabled metering expertise to be developed in-house • - Develop metering standards • - Install meters on existing facilities • - Ensure all repair projects or new construction require meters IAW developed standards • Inspect (and correct) installations

11. Early Efforts (cont.) NAVY PUBLIC WORKS CENTER SAN DIEGO • Meter shop • - Focused on electric meters first • Most costly commodity • - Then gas, then water • - Leverage resources by using in-house expertise in conjunction with contractors • - Work with staff to investigate/correct metering • - Connect to Supervisory Control and Data Acquisition (SCADA) system where feasible

21. Meter Reading NAVY PUBLIC WORKS CENTER SAN DIEGO • Accurate reading of meters a problem • - Attempted to emulate San Diego Gas & Electric company (SDG&E) meter reading program • - Purchased hand-held data collection devices • - Developed “Utilities Consumption Monitor” position • Trained, trained, and trained • - Didn’t work • - Ended up out-tasking the effort to SDG&E • Has been tremendously successful

24. Electrical Demand Avoidance Program NAVY PUBLIC WORKS CENTER SAN DIEGO • SDG&E had significant demand and time-of-use surcharges • - Non-coincident and coincident or peak demand • - Peak, semi-peak, and off-peak usage surcharges • - PWCSD electricity rates mirror SDG&E rates • Send the right price signals to users • “Money talks” -- users decide if shifting load or reducing demand is worth it • - Requires demand-interval metering for accurate allocation of costs

26. Demand-Interval Metering NAVY PUBLIC WORKS CENTER SAN DIEGO • Goal to encourage minimization of demand charges and time-of-use surcharges • Initially planned to obtain data real-time via SCADA system • Delays in implementing SCADA and high costs of SCADA limited this effort • Installation of demand-interval meters for larger facilities was pursued • Tremendous side-benefit -- load profiles • Early software had limited usability and accessibility

27. Demand-Interval Metering (cont.) NAVY PUBLIC WORKS CENTER SAN DIEGO • Initially standardized on induction-disk demand-interval meters with mechanical display • No longer available -- industry moved to all electronic meters • Required PWCSD to change to a multi-vendor meter reading handheld device • Also wanted load profile data to be readily available • Itron’s MVRS ™, MV-90 ™, and MVWeb™ chosen

28. Effective Use of the Data NAVY PUBLIC WORKS CENTER SAN DIEGO • Metering data is vital for an effective energy management program • - Data must be provided to those who can use it to manage energy/water consumption and costs • - Today’s technology makes it much easier to provide the data in useful formats • Must ensure the information that is provided is correct

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