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Sustaining Together Making Your BAS System Work for You

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.

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Sustaining Together Making Your BAS System Work for You

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  1. Sustaining TogetherMaking Your BAS System Work for You

  2. Talking Points • Background • Scheduling • Timeline • Alarm Management • Equipment Warnings Northrup Auditorium – Built 1928

  3. Background • 220 Buildings • 24 million square feet • $50 million annual utility budget Nils Hasselmo Hall – Built 1996 • 900+ BACnet/IP controllers • 25,000+ field controllers • BAS Systems • Automated Logic Nils Hasselmo President from 1988-1997 Known for commitment to undergraduate education. • Honeywell • Johnson Controls • Siemens • Tridium • Trane

  4. Timeline • Pre-2003 – Proprietary DDC & Legacy electro-pneumatic systems Jones Hall – Built 1901 Frederick Jones 1889, First Professor of Physics Dean of College of Engineering

  5. Timeline • Pre-2003 – Proprietary DDC & Legacy electro-pneumatic systems Phillips Wangensteen – Built 1974 • 2003 – 2005 – Emergence of native BACnet DDC systems Owen Wangensteen Chief of Surgery 1930-1967 at UofM Med School – Pioneered open heart surgery. Credited with saving over 1,000,000 lives!

  6. Change to BACnet 2004

  7. Change to BACnet

  8. Timeline • Pre-2003 – Proprietary DDC & Legacy electro-pneumatic systems • 2003 – 2005 – Emergence of native BACnet DDC systems Pilsbury Hall Built in 1889 • 2006 – 2011 – System Upgrades John S. Pilsbury 8th Governor of Minnesota from 1876-1882.

  9. System Upgrades TCF Bank Stadium - 2009 Science Teaching & Student Services - 2010 Medical BioSciBldg - 2009 Translational Research - 2007

  10. System Upgrades JCI N2 Siemens P1 Honeywell C-bus Trane Legacy

  11. Timeline • Pre-2003 – Proprietary DDC & Legacy electro-pneumatic systems • 2003 – 2005 – Emergence of native BACnet DDC systems Jones Hall – Built 1901 • 2006– 2011 – System Upgrades • 2012 – Present – Optimization

  12. Optimization • 2012 – 2013 – Optimization • Scheduling Weisman Art Museum – Built 1992 • Alarm Management • Equipment Warnings Frederick Weisman Philanthropist & art collector. He donated $3 million dollars to the UofM to establish this art museum.

  13. Scheduling • Over 1700 pieces of HVAC equipment running on time schedule. Eddy Hall – Built 1881 Henry Eddy – Math professor, Civil Engineer and dean of college of engineering. Eddy Hall is the oldest Building on campus. • 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.

  14. Scheduling Schedule Variance Report Looks for fans not running the amount of hours they are scheduled. HP ~8% VFD Speed ~70%

  15. 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.

  16. Scheduling Fan Speed Reduction Schedules Static Pressure Reset Schedule Should see bellW curves every day. Static Pressure Setpoint

  17. Scheduling Fan Speed Reduction Schedules Static Pressure Reset Schedule No bellW curve. Flat-line. Static Pressure Setpoint

  18. Scheduling Fan Speed Reduction Schedules Static Pressure Schedule Eddy Hall – Built 1881 ~80% VFD Speed Savings will vary based on the fan size, but there will be savings. ~70%

  19. 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.

  20. Alarming Smart Alarming CRITICAL ALARMS -Alarms that require immediate alert & action. Donhowe Building – Built 1924 Safety trips, command/status mismatches, critical temperature limits, etc.

  21. Alarming Smart Alarming HVAC ALARMS -Alarms that can be prioritized & backlogged. Folwell Hall – Built 1906 Cost to build: $416,000 2012 cost to remodel: $34,500,000 Unreliable points, setpoint drift, all room temps deemed ‘non-critical’ spaces, other points that do not require immediate dispatch.

  22. Alarming Smart Alarming HVAC ALARMS -Alarms that can be prioritized & backlogged. SE Steam Plant Built in 1902 Provides steam to all of Minneapolis campus buildings. High Alarm Limit = 65˚ High Alarm Limit = 70˚ 10˚ bracket 10˚ bracket Discharge Air Temp-Setpoint = 60˚ Discharge Air Temp-Setpoint = 55˚ 10-10 Rule! Low Alarm Limit = 45˚ Low Alarm Limit = 50˚ 10 minute Alarm Delay

  23. Alarming Smart Alarming HVAC ALARMS -Alarms that can be prioritized & backlogged. Washington Ave. Bridge Pedestrian bridge will have light rail trains running across it in 2014. High Alarm Limit = 1.3 in wc 0.3” bracket Static Pressure Setpoint = 1.0 in wc Low Alarm Limit = 0.7 in wc

  24. Alarming Smart Alarming WARNING ALARMS -Alarms that indicate maximum analog output effort. Mariucci Arena Built in 1993 – Home of Gopher Hockey VFDs, VAV dampers, heating & cooling valves that are at 100% command. Reheat Valves not working properly Unattainable airflow settings

  25. Smart Alarming VFDs, VAV dampers, heating & cooling valves that are at 100% command. VFD at 100% No Static Pressure Static Pressure Alarm Limits

  26. Smart Alarming VFDs, VAV dampers, heating & cooling valves that are at 100% command. ~1000 cfm short of setpoint. VAV Damper is at 100%

  27. Smart Alarming VFDs, VAV dampers, heating & cooling valves that are at 100% command. Just Data!

  28. 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.

  29. Review Moos Tower Built in 1970Costs nearly $500K per month to operate! Consulting Firms 2003 2011 Open Protocol DDC Controls Proprietary Pneumatics Optimize Integrate

  30. Continuous Commissioning • Keep fans running at or below scheduled hours. • Reduce fan speeds &/or widen setpoints for a few hours every night. • Only get alerted for really important critical alarms. • 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.

  31. QUESTIONS ?

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