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Navy Public Works Center San Diego Utilities 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. Topics.

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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


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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


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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


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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


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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


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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…


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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


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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


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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


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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


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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


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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


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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


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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


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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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BlahBlah

NAVY PUBLIC WORKS CENTER SAN DIEGO


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BlahBlah

NAVY PUBLIC WORKS CENTER SAN DIEGO


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D/I Metering at Over-the-Horizon Bases

NAVY PUBLIC WORKS CENTER SAN DIEGO

  • OSD provided funding to install D/I meters at other Navy Region Southwest bases

    • - Naval Base Ventura County

    • - Naval Air Station Lemoore

    • - Naval Air Facility El Centro

    • - Naval Weapons Station Seal Beach

    • - Naval Air Station Fallon

  • Naval Facilities Engineering Service Center (NFESC) providing turnkey project

    • - Navy metering expertise

    • - Assisting base with selection of facilities to be metered


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D/I Metering at OTH Bases (cont.)

NAVY PUBLIC WORKS CENTER SAN DIEGO

  • Meter interval data will be uploaded nightly and available on the web

  • Variety of communications may be used

    • - Radio

    • - Cell phones

    • - Phone lines

    • - Hardwire

    • - Fiber optic

    • - LAN/WAN

    • - Power line carrier


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Metering Lessons Learned/Conclusions

NAVY PUBLIC WORKS CENTER SAN DIEGO

  • It’s not easy

  • It’s not quick

  • It’s not cheap

  • Get help

  • Get the data to those who will use it

  • Standardize as much as possible

  • Have good specifications

  • Ensure radio spectrum issues are addressed

  • Consider connection to EMS or SCADA


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Metering Lessons Learned/Conclusions

NAVY PUBLIC WORKS CENTER SAN DIEGO

  • Getting outages is difficult

  • It’s not over once the meter is installed

  • Use multi-ratio current transformers

  • Ensure IT folks on-board

  • Meter facilities to get the most bang for the buck (start with the biggest users)

  • It’s not just about electricity

  • It’s the only way to effectively manage energy/water usage


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