EMIS ReportDesign-Prelim 2020sep11 - Flipbook - Page 24
Figure 9 show the median savings across the
buildings in each portfolio, for each year after
implementation, or EIS and FDD implementations,
respectively. In each plot, the gray line represents
a single organization’s portfolio of buildings, and
the y-axis represents percent savings relative to the
year before the EMIS installation, referred to as the
“baseline year.” The red line indicates the median
savings across all organizations. The results indicate
that savings generally increase over time for the
organizations that had EMIS installed for multiple
years. The decrease in savings for EIS in Year 3 is
likely an artifact of the small number of organizations
reporting at three years and beyond. Energy data
were analyzed as provided by the owners without
normalizing for other potential events such as changes
in building equipment or occupancy levels.
Four organizations reported savings results
determined from interval data analysis tools. Two
organizations estimated savings using engineering
calculations. The energy savings from the other
44 participants were calculated by LBNL using
annual energy use analysis.
With annual energy use data from 22 organizations5 implementing EIS, and 28 organizations
implementing FDD, the sub-cohorts were large
enough to report energy savings for each EMIS
type. The implementations with both EIS and FDD
(17 organizations) were primarily FDD solutions that
integrated some meter data analytics and were
combined with the FDD-only implementations
(11 organizations) within these results.
FIGURE 9: Percent energy savings relative to the year before EMIS installation by
organizations participating in the Smart Energy Analytics Campaign
(n = 22 in Year 1)
Individual organizations
Median values
30%
20%
17%
11%
10%
4%
3%
2%
4%
8%
4%
30%
22%
13%
10%
0%
–10%
–10%
1
2
3
4
5
6
Post-installation year (EIS)
7
8
27%
20%
0%
–20%
Individual organizations
Median values
40%
Energy Savings
Energy Savings
40%
5
(n = 28 in Year 1)
3. SMART ENERGY ANALYTICS CAMPAIGN RESULTS
Energy Savings
–20%
6%
1
9%
2
3
4
Post-installation year (FDD)
5
6
EIS energy use data were reported by 14 participants in the Campaign and 8 participants in the “2013 EIS study” (Granderson et al. 2016).
Berkeley Lab | Proving the Business Case for Building Analytics
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