Scott Petit, C.E.M., CxA, LEED AP O+M
Kevin Spates, C.E.M., CxA
The University of Massachusetts Medical School (UMMS) retained the services of WSP to perform retro-commissioning and energy analysis at the UMMS Albert Sherman Center (ASC) located at 55 Lake Avenue North, in Worcester, Massachusetts. The comprehensive study involved: ■ Evaluating energy performance to create an accurate building baseline. ■ Investigating and documenting known operation issues. ■ Building system trend analysis of operational/control issues. ■ Retro-commissioning building systems to original design intent. ■ Developing a comprehensive corrective action log and master list of findings. ■ Returning building operation to basis of design while accounting for any building use changes. ■ Identifying potential energy conservation measures (ECMs) / optimization strategies. ■ Establishing a target energy use and energy cost reduction. ■ Implementing ECMs and optimizing system operation and design. ■ Trending analysis and functional testing to verify successful implementation of ECMs / optimization strategies. ■ Confirming system performance and targets through measurement and verification (M&V) over a (12) month period. The ASC is a 512,000 square-foot, 11-story, educational research laboratory facility. The facility supports approximately 700 scientists, graduate students, and staff. The retro-commissioning and energy analysis effort was executed in three (3) major phases: Phase I – Investigate & Identify: The primary tasks were to investigate building systems operation, establish a baseline for energy use, identify operational issues, return the building to the original design intent, and develop a list of optimization measures for further investigation and implementation in Phase II. Phase II – Implementation and Optimization: In this phase, the optimization measures identified in Phase I were further explored and implemented. Trending analysis and functional testing were performed to confirm the successful implementation and operational performance of the optimization measures. Upon implementation of the optimization measures, utility incentive applications were submitted to Eversource. UMMS received a $52,000 utility incentive from Eversource. Phase III – Measurement and Verification (M&V): The M&V phase consisted of memorandums outlining monthly energy and energy cost savings during the performance period (1 year post-implementation period) with respect to the baseline period (1 year pre-implementation period). Per the M&V analysis, the energy use index (EUI) decreased by 29.2 kBtu/SF. The project team identified and resolved (70) operational issues and identified and implemented (8) optimization measures resulting in annual energy savings of 287,732 kWh, 26,235 ton-days (chilled water), and 4,011 klbs (steam). This equates to approximately $144,440 in annual energy cost savings with an ROI of 249%.
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