Operational energy-efficiency improvement of municipal water pumping in California

A. DeBenedictis*, B. Haley, Chi-Keung WOO, E. Cutter

*Corresponding author for this work

    Research output: Contribution to journalJournal articlepeer-review

    13 Citations (Scopus)


    This paper implements a normalization/regression-based approach to estimate the kWh energy and kW savings from an experimental OEEP (operational energy-efficiency program) for municipal water pumping in California. The voluminous 1-min data collected in the course of the OEEP presents a unique opportunity to analyze how VSD (variable-speed drive) technology aided by a PLC (programmable-logic-controller) may improve municipal water pumping's operational energy efficiency. Our proposed approach enables a comparison of pump operations with and without the OEEP, yielding accurate estimates for kWh energy and kW capacity savings that are useful in evaluation, monitoring, and verification of the program. Our findings lead us to conclude that (a) variability of efficacy by analyzed pump sites suggests targeted implementation of the OEEP; and (b) for a correctly-sized pump operating near its optimal kW-output value, adding a VSD and PLC can actually harm the pumping system's overall energy-efficiency.

    Original languageEnglish
    Pages (from-to)237-243
    Number of pages7
    Publication statusPublished - 1 May 2013

    Scopus Subject Areas

    • Civil and Structural Engineering
    • Building and Construction
    • Pollution
    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Electrical and Electronic Engineering

    User-Defined Keywords

    • Energy efficiency
    • Regression
    • Variable-speed drive
    • Water pumping


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