Inverse model-based detection of programming logic faults in multiple zone VAV AHU systems

Implementation of sequences of operation for heating, ventilation, and air conditioning (HVAC) systems into a building automation system (BAS) is a critical process for building performance. Mistakes are commonly made while interpreting the sequences of operation from the mechanical design, converti...

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Veröffentlicht in:Building and environment Jg. 211; S. 108732
Hauptverfasser: Gunay, Burak, Bursill, Jayson, Huchuk, Brent, Shillinglaw, Scott
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford Elsevier Ltd 01.03.2022
Elsevier BV
Schlagworte:
Air conditioning
Air masses
Air temperature
Automation
Building automation
Building management systems
Cooling coils
Energy consumption
Fault detection
Fault detection and diagnostics
Faults
Heating
Inverse modelling
Logic
Mass balance
Programming
Programming logic faults
Sequences
Sequences of operation
VAV AHU systems
Sequences of operation
VAV AHU systems
Inverse modelling
Programming logic faults
Fault detection and diagnostics
ISSN:0360-1323, 1873-684X
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Zusammenfassung:Implementation of sequences of operation for heating, ventilation, and air conditioning (HVAC) systems into a building automation system (BAS) is a critical process for building performance. Mistakes are commonly made while interpreting the sequences of operation from the mechanical design, converting them into BAS programs, and making ad-hoc changes to the BAS programs to address occupant complaints. This paper presents a novel inverse model-based fault detection and diagnostics (FDD) method for the discovery of BAS programming logic faults in variable air volume (VAV) air handling unit (AHU) systems. Using widely available BAS trend data types, the method first trains inverse models characterizing the heat and air mass balance of a VAV AHU system’s mixing box, heating and cooling coils, VAV terminal units, and zones. Then, the expected operational behaviour of the VAV AHU system is constructed by using ASHRAE Guideline 36 sequences of operation and the trained inverse models. Deviations from the expected operation are treated as the symptoms for the detection of programming logic faults. The method is demonstrated with BAS trend data from a 41-zone VAV AHU system in Ottawa, Canada. Two faults in supply air temperature and pressure reset programs are detected, significantly increasing fan electricity and heating energy use. •An inverse model-based method is developed for detection of programming logic faults.•Inverse models are used to construct the expected operational behaviour.•Deviations from the expected operational behaviour are treated as faults.•The method is demonstrated with data from a 41-zone VAV AHU system.
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ISSN:0360-1323
1873-684X
DOI:10.1016/j.buildenv.2021.108732