EMIS ReportDesign-Prelim 2020sep11 - Flipbook - Page 8
Energy Information Systems
(EIS)
EMIS Category
Fault Detection and Diagnostics
(FDD)
Used by
Energy managers
Facility operations teams, energy managers,
and service providers
Used for
Portfolio management
Portfolio key performance indicators (KPIs) /
prioritization of properties for improvements
Energy use tracking and opportunity
identification (mainly heat maps and load
profiles)
Emerging tool for public/occupant
communications and measurement and
verification (M&V)
Detailed system analysis
Reducing preventative maintenance program
costs
Improving comfort with zone-level diagnostics
Finding hidden waste and maintaining
savings (participants shared that existing
building commissioning [EBCx]) savings did
not persist without MBCx)
Whole building energy meters by fuel for large
buildings in a portfolio, either with utilityprovided interval data or an owner-installed
meter. Submetering is less prevalent.
Installation focuses on fault detection and
diagnostics (FDD) for problem HVAC areas
(central plant, air handling units [AHUs]), or
variable air volume (VAV) terminal boxes.
Typical installation
Common analytics
n = 104 organizations
Floor area:
567 million sq ft
6,500 buildings
Energy use intensity (kBtu/sq ft)
Heat map
Load profile, filtered by day type
Predictive models for energy use
Top measures
implemented through
the MBCx process
n = 78 organizations
Floor area:
461 million sq ft
Improve HVAC scheduling
Share energy information with occupants
Adjust space temperature setpoints
Energy Savings*
n = 50 organizations
2,648 buildings
Floor area:
240 million sq ft
Cost*
n = 72 organizations
Floor area:
471 million sq ft
Cost-effectiveness
n = 24 organizations
Floor area:
206 million sq ft
EXECUTIVE SUMMARY
TABLE ES-1: Summary of EMIS Use by Smart Energy Analytics Campaign
Participants, through July 2020
Chiller plant operations and setpoint
optimization
Air handlers (simultaneous heating and
cooling, economizers, valve leak-by)
Terminal unit operation
Detecting failed sensors
Improve HVAC scheduling
Improve economizer operation
Reduce overventilation
Reduce simultaneous heating and cooling
Adjustment of space temp setpoints
Reset supply air temp and duct static
pressure
Tune control loops to avoid hunting
Median energy savings (whole building, all fuels) after two years of EMIS installation:
EIS: 3%, ($0.03/sq ft); range: -15% to 22%
FDD: 9%, ($0.24/sq ft); range: -1% to 28%
*Savings are not specifically attributed to operational measures. Savings may include changes
to the buildings that are not related to analytics.
Median base cost (software + installation): EIS $0.01/sq ft; FDD $0.06/sq ft
Median annual recurring cost: EIS $0.01/sq ft per year; FDD $0.02/sq ft
Median in-house labor hours/month per building: EIS one hour; FDD eight hours
*Base and recurring cost data have been provided in $ and normalized by floor area.
Median simple payback period:
EIS: 2 years (n = 7); 36 million sq ft
FDD: 2 years (n = 17); 170 million sq ft
Berkeley Lab | Proving the Business Case for Building Analytics
6
