Efficiency Assurance

Energy and Efficiency Assurance

Energy-Efficiency Assurance is a relatively new concept in commissioning. Typically, once the first three commissioning phases (noted above) are completed and a facility is accepted by an owner, the facility is left to operate poorly or efficiently over the remainder of its life, affected only by its maintenance program. Efficiency Assurance commissioning means continuing energy-use monitoring for the facility's life. Determining the laboratory's energy savings is a function of the project's value, the energy-efficiency measures (EEMs) installed, and their expected cost effectiveness. Baseline performance is first accurately defined, and the potential to generate energy savings is predicted based on life-cycle cost analyses performed during right-sizing (see Chapter 3). Verifying baseline energy use and post-occupancy conditions validates that energy-consuming systems are operated in conformity with the design-basis documents. Follow-up monitoring, as part of Efficiency Assurance commissioning, involves inspections, spot measurement tests, or continual energy-use measurements. A monitoring interval is established to account for the facility's energy-use profile and installed energy-efficiency systems. Therefore, the monitoring interval varies from project to project. [Measurement and Verification (M&V) Guidelines for Federal Energy Projects, 1996; Yoder, et al 1992]

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Baseline energy use

EMCS and efficiency assurance

Verification of EEMs

Estimating energy savings

Determining monitoring intervals


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