Automated Fault Diagnosis Method for a Variable Air Volume Air Handling Unit
- Automated Fault Diagnosis Method for a Variable Air Volume Air Handling Unit
- 한동원; 장영수
- Automated fault diagnosis method; VAV AHU; Expert rules; HVAV system; FDD
- Issue Date
- ICROS-SICE International Joint Conference 2009
- , 2012-2017
- Automated control methods in building HVAC systems have been widely applied. It is known that poorly
maintained, degraded, and improperly controlled equipment wastes 15% to 30% of energy used in commercial
buildings. So, we need to detect and cope with abnormal event of target system using intelligent control system. The
expert rules were developed for application to single-duct variable air volume or constant air volume air handling unit.
Expert rules are composed of 28 rules using only a small number of temperatures and control signals. If any one of rules
is satisfied, a fault is indicated. In this study, we tested the performance of FDD method by expert rule using simulation
data under single fault and multiple faults cases. Test of the expert rule set was performed using no-fault and faulty data
produced by a simulation of a three-zone building conditioned with a VAV AHU. The simulations were carried out using
summer season weather data in Seoul during the occupied period under no-fault and faulty conditions. FDD method
using expert rules was found to indicate each fault accurately under single fault and multiple faults.
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- KIST Publication > Conference Paper
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