Energy Charting and Metrics (ECAM) Tool
Introduction
February 14, 2012
Bill Koran, P.E.
Director of Energy Analytics
NorthWrite, Inc.
Intellectual Property
NorthWrite is a web-based technology
company focused on supporting a global
network of strategic partners.
Data/Application Management
- Building information modeling (BIM)
- Application Integration Framework
- Enterprise Management Platform
- OEM Platform/Portal
Analytics
- Modeling
- Prediction
- Benchmarking
Network Operations Center
- High volume, scalable hosting infrastructure
- Wireless communications/hardware
- Remote system data collection
- Remote building control (Demand Response)
Green Systems
- Automated Energy Star Rating
- Lobby kiosk/portal view
• Business formed in 2001
• Over 2,000 meters being monitored, growing by
50% in next 2 months
• Management team ex-Honeywell
• Offices: Minneapolis, Portland OR.
• Software as a Service
o Robust database back end
o User-friendly web interface
• Focus: Energy
• Markets: Commercial; Multi-location enterprise
• Channel: Direct, national partner network, OEM’s
Reporting
Utility Bill Analysis
- Bill capture, dissection, aggregation
Energy Program Management
- Project and task tracking
- Metrics and program measurement
Collaboration
- B2B Content Subscriptions
- Partners, Providers, Customers
NorthWrite Energy Information Management System Architecture
Browser
FTP
SMS
HT
TP
/
Users
H
Data Warehouse
TT
P
Field Operations
BMS/SCADA Data
Other Building Systems
User Id:
Password:
Login
Internet
TCP/IP
(Fire, Security, etc.)
/F
TP
Weather Data
Logger Data
User/Activity Data
Application Data
Authentication / Security
H
TT
P
Portal Home Page
Submit
Accessed via
Configuration
NOC Server(s)
EIMS
Ethernet/Web
Wireless
Email
Cellular Provider NOC
Web Services
blish
Business Logic
Transactional DB
Bus. Intelligence
Import/Export
Messaging
Reporting
Universal Applications
SMS
Ema
il
Subscribe / Pu
Charting
Event Mgmt
User Setup
….
Web Applications
Subscribe / Publish
Email Push
RTU Diag
AHU
Customer / BMS Integration
Market Segment Applications
Users
ECAM—My View
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•
•
•
•
Desktop Energy Information System
Energy Data Organizer
Energy Data Summarizer/Aggregator
Energy Data Analysis Tool
Now becoming an M&V Platform
Over 8,000 lines of code
Over 200 I/O controls
ECAM Background
• Initial building blocks and core code based on
automation I developed for my personal use:
– Disaggregation of Timestamps
– Naming of fields
– Automated chart creation and formatting
•
•
•
•
Time-series charts
Scatter charts
Calendar charts
3d charts
– Conversion of utility meter data tables to list format
– A notable feature is the provision of scatter charts based on PivotTables
ECAM Background
• Formal development funded by NBI, NEEA and
California (CEC, PIER, CCxC)
• FREE Excel based tool
• Currently Version 2.0
• Excel 2003/2007/2010
• Many more metrics, charts, and features
• Supports PNNL “Re-Tuning” process
• M&V enhancements in development,
funded by NEEA.
ECAM Incorporates Prior Research
• Chart Types based on the PIER report, Webbased Energy Information Systems for
Energy Management and Demand Response
in Commercial Buildings (2003)
http://www.energy.ca.gov/2003publications/CEC-500-2003-097/CEC-500-2003-097F-A13.PDF
• Point Naming convention from A
Specifications Guide for Performance
Monitoring Systems
http://cbs.lbl.gov/performancemonitoring/specifications/pdf/PM%20Spec%20Guide%20Version%201_2007-03-23.pdf
May 2002 LBNL/CEC
Web-Based Energy Information Systems
LBNL EIS Survey June 2009
Data Visualizations
calendar
Load profile
daily
summary
day
Overlay
3D graphics
x-y plots
DR status
DR reduction
point
is it possible to display an entire month of
consumption profiles (time series)?
is it possible to display daily time series
in hour-long intervals or less?
is it possible to display aggregated
usage? - daily, weekly, …
is it possible to overlay multiple days'
trends on a single plot?
is it possible to overlay multiple time
series data points on a single plot?
is it possible to generate threedimensional surface plots?
can the user plot one trended data point
vs. another?
is it possible to display whether a DR
event is occuring and
event/communication details?
is it possible to graphically display DR
load sheds (vs. load-shape baseline)?
LBNL EIS Survey June 2009
Data Visualizations
• X-y scatter plotting was not a common or
standard visualization capability in 2003, and
while it has grown some it remains an undersupported feature in today’s EIS solutions.
• Given their power in facilitating diagnostic
troubleshooting it is discouraging that only
half the tools surveyed include x-y plotting.
ECAM Charting Features, partial list
• Time series
• X-Y (scatter charts from PivotTable!)
• Daily load profile
• 3D and Surface
• Calendar load profiles
• Box Plot Load Profiles
• Schedule Input Confirmation
ECAM Metrics
• Daytype and Occupancy Metrics
• Occupancy and Month-Year combination
• Daytype and Month-Year combination
• Frequency Distributions and Histogram
• Data Summaries
•
Ratio of typical low to typical high demand
•
Percentiles: Max, 95, 90, 75, median, 25, 10, 5, minimum
•
Std. Deviations: Average, ±1, ±2, ±3
ECAM Features
• Automatic data pre-processing
•
Normalization
•
•
•
•
W/SF
cfm/SF
kW/ton
gpm/ton
• Equipment status inferred from current or kW
• Easy aggregation to totals/averages
•
•
•
•
Hourly
Daily
Monthly
Annual
ECAM M&V, In Development
• Scatter charts for daily totals/averages
• Scatter charts for hourly totals/averages
• Load Profile by Weekday
(like RTU calculator, but with user choice of data point)
• Daily scatter charts for each day of week
so users can easily see which days are similar
•
Easy ad-hoc definition of daytypes like RTU calculator
•
‘Hourtypes’ based on input schedule
ECAM M&V, In Development
• Linear regression.
• Change-Point regressions
•
3-parameter
•
4-parameter
•
5-parameter
•
6-parameter
• Combine hourtype/daytype models into complete model
ECAM M&V, In Development
• Uncertainty Analysis
• Residuals Analysis Charts
• Annual extrapolation using TMY3 weather data
like RTU calculator
M&V Output Charts
Electrical Demand vs. Ambient Temp
1,400
1,200
Avg ElecMtr1_kW
1,000
800
600
400
200
0
20
30
40
60
50
70
80
90
100
Ambient Temperature
Avg ElecMtr1_kW
6p Model
Min Model
Max Model
110
M&V Output Charts
Residuals vs.
Independent Variable
Residual Lag Plot
500
400
400
Residual, kW
Residual Lag 1 hour, kW
500
300
200
100
0
-400 -300 -200 -100 0
-100
100 200 300 400 500
300
200
100
0
20
-200
-200
-300
-300
-400
-400
Residual, kW
30
40
50
60
70
80
-100
Ambient Temperature, ºF
90
100
110
Retuning Charts are Worksheet-Driven
Central Plant
ChW_TempIn
ChW_TempOut
ChW_TempDiff
Bldg_TempOa
Central Plant Central Plant
HoW_TempIn
Pmp_ChW_Sec_gpm
HoW_TempOut Bldg_TempOa
HoW_TempDiff
Bldg_TempOa
AHU
AHU
AHU
AHU_TempOa AHU_TempSa
AHU_Dmpr_OA_%op
AHU_TempRa AHU_TempSaSp AHU_OA_%
AHU_TempMa
AHU_TempSa
AHU
AHU
AHU_Dmpr_OA_%op AHU_DuctStcPres
AHU_Dmpr_RA_%op AHU_DuctStcPresSp
AHU_Dmpr_ExA_%op
Zone
Z_Tl_Dmpr_%op
Z_Tl_Rht%
Z_Occ
Z_Temp
Zone
Z_Tl_Dmpr_%op
AHU scatter
AHU scatter
AHU scatter
AHU scatter
AHU_TempSaSp AHU_Vlv_HeC_%op AHU_TempOa
AHU_TempOa
AHU_TempSa
AHU_Vlv_HeC_%op AHU_Dmpr_OA_%op AHU_TempMa
AHU_Dmpr_RA_%op
AHU_Dmpr_ExA_%op
AHU
AHU_TempOa
AHU_TempRa
AHU_Dmpr_OA_%op
AHU_Dmpr_RA_%op
AHU
AHU_Fan_S_%Spd
AHU_Fan_S_Hz
AHU_Fan_S_Status
AHU_DuctStcPres
AHU
AHU_Dmpr_OA_%op
AHU_Vlv_CC_%op
AHU_Vlv_HeC_%op
AHU
AHU_Fan_R_%Spd
AHU_Fan_R_Hz
AHU_Fan_R_Status
AHU
AHU_Fan_S_%Spd
AHU_Fan_S_Hz
AHU_Fan_S_Status
AHU_Fan_R_%Spd
AHU_Fan_R_Hz
AHU_Fan_R_Status
Load Duration Curve
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Cumulative percentage of time at different loads.
For time period and daytype selected
1,400
1,200
kW
1,000
800
600
400
200
0
0%
10%
20%
30%
40%
50%
60%
70%
Cumulative Percent of Time
80%
90%
100%
950-1000
900-950
850-900
800-850
>1200
1150-1200
1100-1150
1050-1100
1000-1050
kW
750-800
700-750
650-700
600-650
550-600
500-550
450-500
400-450
350-400
300-350
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•
250-300
Total Hours
Load Frequency/Histogram
Actual time at different loads
For time period and daytype selected
2,000
1,800
1,600
1,400
1,200
1,000
800
600
400
200
0
ECAM Links
1. ECAM Spreadsheet:
file://HQ5F01/ESB/ECAM/ECAM_v2pt0dev61.xla
2. ECAM Description:
file://HQ5F01/ESB/ECAM/CommercialBuildings_ECAM_100311.pdf
3. ECAM Users Guide
file://HQ5F01/ESB/ECAM/ECAM%20v2%20Users%20Guide%20draft.pdf
4. PNNL Retuning web site
http://www.pnl.gov/buildingretuning/index.stm
5. Building Retuning Training
http://retuningtraining.labworks.org/training/lms/
6. California Commissioning Collaborative ECAM web site
http://cacx.org/PIER/ecam/
ECAM Can Facilitate
Powerful Analyses
“Bill,
These plots are very telling… I wish I had some of
these figures earlier. I just completed a
textbook… wherein I would have liked to have
included some of these figures.”
T. Agami Reddy, Ph.D., Arizona State University
A New Resource
Applied Data Analysis and Modeling for
Energy Engineers and Scientists, by T. Agami
Reddy, Ph.D.
Springer Science+Business Media 2011.
http://www.springer.com/energy/energy+efficiency/book/978-1-4419-9612-1
Using ECAM
Sample Data
Step 1: Define Data
Step 2: Map Points (Optional)
Step 3: Create Schedule (optional)
Step 4: Input Project Dates (optional)
Step 5: Create Metrics and Charts