Evaluation of Persistence of Savings from SMUD Retrocommissioning Program Page: 4 of 101
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EVALUATION OF PERSISTENCE OF SAVINGS FROM SMUD RETROCOMMISSIONING PROGRAM
FINAL REPORT
Executive Summary
Commercial building retrocommissioning activity has increased in recent years.
Retrocommissioning is a process of identifying and implementing system improvements
in existing buildings, with an emphasis on using low cost operation & maintenance tune-
ups and diagnostic testing instead of capital intensive retrofits.
This report discusses a recent study of retrocommissioning persistence, conducted by
LBNL for the Sacramento Municipal utility District (SMUD). The objective of this study
was to examine a selection of the 17 buildings (prior to 2003) that participated in
SMUD's program and estimate the persistence of energy savings and measure
implementation. The SMUD retrocommissioning program's two primary goals are to
reduce overall building energy consumption and guide the customer toward more far-
reaching improvements and energy efficiency awareness.
The complete report contains the following documents:
* Executive Summary & Final Report
* Appendix A: Data Analysis Methodology Details
* Appendix B: Site-by-Site Energy Analysis Results
* Appendix C: Interview Notes - Raw Data
* Appendix D: Data Analysis Spreadsheet
The Report is organized in five sections. The Introduction describes retrocommissioning
background, persistence of savings issues and previous related work. The Methodology
section provides an overview of the data analysis procedures. The Results and
Discussion sections highlight and interpret key findings. The Summary section provides
conclusions and recommendations.
Data Collection & Analysis
The project phases progressed as follows:
* A background review of persistence work,
* Development a of project plan and site selection,
* Data collection and analysis, and
* Development of recommendations and the final report.
The selected sites included six office buildings, one hospital and one laboratory. For
report distribution and to protect the privacy of the study sites, the locations have been
kept anonymous. Anonymity was not implemented in Appendix D because of the
difficulty of doing so in the large spreadsheet. For this reason, public distributions of this
report will not include Appendix D without SMUD's prior approval.
Retrocommissioning Participants in Year 1999
* Office (352,000 ft2) Construction year unknown
* Hospitall (267,000 ft2) Const. in 1996
* Office (150,000 ft2) Const. in 1995
* Lab1 (94,000 ft2) Const. in 1997ii
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Bourassa, Norman J.; Piette, Mary A. & Motegi, Naoya. Evaluation of Persistence of Savings from SMUD Retrocommissioning Program, report, April 1, 2003; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc785952/m1/4/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.