RESEARCH PAPERS: Papers in Thermofluid Area

An Innovation-Based Methodology for HVAC System Fault Detection

[+] Author and Article Information
P. B. Usoro, I. C. Schick, S. Negahdaripour

Scientific Systems, Inc., Cambridge, MA 02140

J. Dyn. Sys., Meas., Control 107(4), 284-289 (Dec 01, 1985) (6 pages) doi:10.1115/1.3140737 History: Received December 01, 1984; Online July 21, 2009


Although Energy Management and Control Systems (EMCS) have since the early 1970’s contributed significantly to the reduction (20-40 percent) of energy use in buildings without sacrificing occupants’ comfort, their full capabilities have not been completely realized. This is in part due to their inability to quickly detect and compensate for failures in the Heating, Ventilation and Air Conditioning (HVAC) system. In fact, no matter how good the control scheme for the HVAC system might be, the presence of undetected faults can completely offset any expected savings. This paper presents a methodology for detecting faults in an HVAC system using a nonlinear mathematical model and an extended Kalman filter. The technique was implemented in a computer program and successfully used to detect “planted” faults in simulations of the air handler unit of an HVAC system. Test results are presented to demonstrate the effectiveness of the methodology.

Copyright © 1985 by ASME
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