Making Your BAS System Work for You Talking Points Scheduling Alarm Management Equipment Warnings Background Timeline Northrup Auditorium Built 1928 Background Nils Hasselmo Hall Built 1996 ID: 131387
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Slide1
Sustaining Together
Making Your BAS System Work for YouSlide2
Talking Points
Scheduling
Alarm Management
Equipment Warnings
Background
Timeline
Northrup Auditorium – Built 1928Slide3
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
Hasselmo
President from 1988-1997 Known
for commitment to undergraduate education.Slide4
Timeline
Jones Hall – Built 1901
Pre-2003 – Proprietary DDC & Legacy electro-pneumatic systems
Frederick
Jones
1889, First Professor
of
PhysicsDean of
College
of
EngineeringSlide5
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!Slide6
Change to
BACnet
2004Slide7
Change to
BACnetSlide8
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 1889John S. Pilsbury8th Governor of Minnesotafrom 1876-1882.Slide9
TCF Bank Stadium - 2009
Science Teaching & Student Services - 2010
Medical
BioSci
Bldg
- 2009
Translational Research - 2007
System UpgradesSlide10
JCI
N2
Honeywell C-bus
Siemens P1
TraneLegacy
System UpgradesSlide11
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 – OptimizationSlide12
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.Slide13
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. Slide14
Scheduling
~8%
~70%
Looks for fans not running the amount of hours they are scheduled.
VFD Speed
HP
Schedule Variance ReportSlide15
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.Slide16
Scheduling
Static Pressure
Setpoint
Static Pressure Reset Schedule
Fan Speed Reduction Schedules
Should see bell
W curves every day. Slide17
Scheduling
Static Pressure
Setpoint
Static Pressure Reset Schedule
Fan Speed Reduction Schedules
No bell
W curve. Flat-line. Slide18
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 SchedulesSlide19
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.
Slide20
Alarming
Donhowe
Building – Built 1924
Smart Alarming
CRITICAL ALARMS
-Alarms that require immediate alert & action.
Safety trips, command/status mismatches, critical temperature limits, etc. Slide21
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. Slide22
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 DelaySlide23
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” bracketSlide24
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 settingsSlide25
Smart Alarming
VFDs, VAV dampers, heating & cooling valves that are at 100% command.
VFD at 100%
No Static Pressure
Static Pressure Alarm LimitsSlide26
Smart Alarming
VFDs, VAV dampers, heating & cooling valves that are at 100% command.
VAV Damper
is at
100% ~1000 cfm
short of setpoint.Slide27
Smart Alarming
VFDs, VAV dampers, heating & cooling valves that are at 100% command.
Just Data!Slide28
Alarming
Focus 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.Slide29
Review
Moos Tower
Built in 1970
Costs nearly $500K per month to operate!
Proprietary
PneumaticsOpen ProtocolDDC ControlsIntegrateOptimize2003
2011
Consulting FirmsSlide30
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.Slide31
QUESTIONS ?