sustaining together making your bas system work for you
DESCRIPTION
Sustaining Together Making Your BAS System Work for You. Talking Points. Background. Scheduling. Timeline. Alarm Management. Equipment Warnings. Northrup Auditorium – Built 1928. Background. 220 Buildings. 24 million square feet . $50 million annual utility budget. - PowerPoint PPT PresentationTRANSCRIPT
Sustaining Together
Making Your BAS System Work for You
FM – Energy Management
Talking Points Scheduling Alarm Management Equipment Warnings
Background Timeline
Northrup Auditorium – Built 1928
FM – Energy Management
Background
Nils Hasselmo Hall – Built 1996
220 Buildings
$50 million annual utility budget
BAS Systems
Johnson Controls Honeywell
Siemens Tridium Trane
Automated Logic
24 million square feet
900+ BACnet/IP controllers 25,000+ field controllers
Nils HasselmoPresident from 1988-1997 Known for commitment to undergraduate education.
FM – Energy Management
Timeline
Jones Hall – Built 1901
Pre-2003 – Proprietary DDC & Legacy electro-pneumatic systems
Frederick Jones1889, First Professor of PhysicsDean of College of Engineering
FM – Energy Management
Timeline Pre-2003 – Proprietary DDC &
Legacy electro-pneumatic systems
2003 – 2005 – Emergence of native BACnet DDC systems
Phillips Wangensteen – Built 1974
Owen WangensteenChief of Surgery 1930-1967 at UofM Med School – Pioneered open heart surgery. Credited with saving over 1,000,000 lives!
FM – Energy Management
Change to BACnet
2004
FM – Energy Management
Change to BACnet
FM – Energy Management
Timeline Pre-2003 – Proprietary DDC &
Legacy electro-pneumatic systems
2003 – 2005 – Emergence of native BACnet DDC systems
2006 – 2011 – System Upgrades
Pilsbury Hall Built in 1889
John S. Pilsbury8th Governor of Minnesotafrom 1876-1882.
FM – Energy Management
TCF Bank Stadium - 2009 Science Teaching & Student Services - 2010
Medical BioSci Bldg - 2009 Translational Research -
2007
System Upgrades
FM – Energy Management
JCI N2
Honeywell C-bus
Siemens P1
TraneLegacy
System Upgrades
FM – Energy Management
Timeline
Jones Hall – Built 1901
Pre-2003 – Proprietary DDC & Legacy electro-pneumatic systems
2003 – 2005 – Emergence of native BACnet DDC systems
2006– 2011 – System Upgrades
2012 – Present – Optimization
FM – Energy Management
Optimization
Weisman Art Museum – Built 1992
2012 – 2013 – Optimization
Scheduling Alarm Management Equipment Warnings
Frederick Weisman Philanthropist & art collector. He donated $3 million dollars to the UofM to establish this art museum.
FM – Energy Management
Scheduling
Eddy Hall – Built 1881
Over 1700 pieces of HVAC equipment running on time schedule.
Weekly, we track scheduled hours and compare them to actual runtime. If there’s a delta, we investigate.
If you can’t shut the fans off, consider reducing the static pressure or slowing down the fan by 10-15% over night.
Henry Eddy – Math professor, Civil Engineer and dean of college of engineering. Eddy Hall is the oldest Building on campus.
FM – Energy Management
Scheduling
~8%
~70%
Looks for fans not running the amount of hours they are scheduled.
VFD Speed
HP
Schedule Variance Report
FM – Energy Management
Scheduling Over 1700 pieces of HVAC
equipment running on time schedule.
Weekly, we track scheduled hours and compare them to actual runtime. If there’s a delta, we investigate.
If you can’t shut the fans off, consider reducing the static pressure or slowing down the fan by 10-15% over night.
FM – Energy Management
SchedulingSt
atic
Pre
ssur
e Se
tpoi
nt
Static Pressure Reset Schedule
Fan Speed Reduction Schedules
Should see bell W curves every day.
FM – Energy Management
SchedulingSt
atic
Pre
ssur
e Se
tpoi
nt
Static Pressure Reset Schedule
Fan Speed Reduction Schedules
No bell W curve. Flat-line.
FM – Energy Management
Scheduling
Eddy Hall – Built 1881
~80%
~70%
Savings will vary based on the fan size, but there will be savings.
VFD Speed
Static Pressure Schedule
Fan Speed Reduction Schedules
FM – Energy Management
Alarming Smart Alarming
CRITICAL ALARMS
-Alarms that require immediate alert & action.
HVAC ALARMS
-Alarms that can be prioritized & backlogged.
WARNING ALARMS
-Alarms that indicate maximum analog effort.
FM – Energy Management
Alarming
Donhowe Building – Built 1924
Smart Alarming
CRITICAL ALARMS
-Alarms that require immediate alert & action.
Safety trips, command/status mismatches, critical temperature limits, etc.
FM – Energy Management
Alarming
Folwell Hall – Built 1906 Cost to build: $416,000 2012 cost to remodel: $34,500,000
Smart Alarming
Unreliable points, setpoint drift, all room temps deemed ‘non-critical’ spaces, other points that do not require immediate dispatch.
HVAC ALARMS
-Alarms that can be prioritized & backlogged.
FM – Energy Management
Alarming
SE Steam Plant Built in 1902 Provides steam to all of Minneapolis campus buildings.
Smart Alarming
Discharge Air Temp-Setpoint = 55˚
HVAC ALARMS
-Alarms that can be prioritized & backlogged.
High Alarm Limit = 65˚
Low Alarm Limit = 45˚
10˚ bracket
Discharge Air Temp-Setpoint = 60˚
High Alarm Limit = 70˚
Low Alarm Limit = 50˚
10˚ bracket
10-10 Rule!
10 minute Alarm Delay
FM – Energy Management
Alarming
Washington Ave. Bridge Pedestrian bridge will have light rail trains running across it in 2014.
Smart Alarming
Static Pressure Setpoint = 1.0 in wc
HVAC ALARMS
-Alarms that can be prioritized & backlogged.
High Alarm Limit = 1.3 in wc
Low Alarm Limit = 0.7 in wc
0.3” bracket
FM – Energy Management
Alarming
Mariucci Arena Built in 1993 – Home of Gopher Hockey
Smart Alarming
VFDs, VAV dampers, heating & cooling valves that are at 100% command.
WARNING ALARMS
-Alarms that indicate maximum analog output effort.
Reheat Valves not working properly
Unattainable airflow settings
FM – Energy ManagementSmart AlarmingVFDs, VAV dampers, heating & cooling valves that are at 100% command.
VFD at 100%
No Static Pressure
Static Pressure Alarm Limits
FM – Energy Management
Smart AlarmingVFDs, VAV dampers, heating & cooling valves that are at 100% command.
VAV Damper is at 100%
~1000 cfm short of setpoint.
FM – Energy Management
Smart AlarmingVFDs, VAV dampers, heating & cooling valves that are at 100% command.
Just Data!
FM – Energy Management
AlarmingFocus Lists
Using database queries on the alarm database, alarm statistics can be pulled to provide a targeted list of unhealthy behaviors.
Heating valves should not fully open 700-800 times per week during July.
FM – Energy Management
Review
Moos Tower Built in 1970 Costs nearly $500K per month to operate!
ProprietaryPneumatics
Open ProtocolDDC Controls Integ
rateOptimize
2003 2011
Consulting Firms
FM – Energy Management
Continuous Commissioning Keep fans running at or below scheduled hours.
Only get alerted for really important critical alarms.
Reduce fan speeds &/or widen setpoints for a few hours every night.
Run reports to collect high frequency non-critical alarms & plan to address a couple items per week.
Keep track of analog outputs that are often at 100% effort.
FM – Energy Management
QUESTIONS ?