Measuring And Verifying Whole-Building Commercial Retrofit Performance
Utilities looking for deeper energy savings from complex, whole-building energy conservation projects want empirical evidence of real savings – measurement and verification that covers HVAC, lighting, plug loads, data centers, and more. Smart grid technology can help.
In this video, Joan Effinger, technical manager with PECI, describes a research paper looking at three interdependent questions:
How much energy savings is required to enable accurate verification?
How much uncertainty (or what confidence level) is acceptable?
How long should the monitoring period be?
Her presentation summarizes the results of case studies in three office and five grocery buildings. Among the findings:
Three to six months of monitoring can suffice, although higher savings rates require shorter monitoring periods, and vice versa.
Data is more reliable if the monitoring period includes a “swing season” (spring or fall).
The research paper also explores the need for an approved programmatic framework to help give whole-building M&V traction for verifying savings in commercial buildings. That framework should include pre-screening criteria for choosing the M&V method, setting the acceptable level of uncertainty, and choosing the methods for claiming savings.