Fault Detection and Diagnostics for Rooftop Air Conditioners

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refleak compleak llrestr condfoul evapfoul
Tsh-Tsc (C)
15
0
Load level 1 Load level 2 Load level 3 Load level 4 Load level 5
-15
1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5
Fault Level
Figure 2-10 Decoupling refrigerant leakage faults using
∆
Tsh
− sc
2.2 Purdue Field Emulation Site’s Demonstration
To demonstrate the decoupling-based fault detection and diagnosis approach,
multiple-simultaneous faults were artificially introduced to the Purdue field emulation
site, which has been described in a previous deliverable.
The decoupling-based fault detection and diagnosis approach described in
Chapter 1 was applied to the demonstration. To make the demonstration intuitive, a
movie was made to show the whole process. There are four windows shown in the movie:
Fault Detection and Diagnosis Window, System Performance and Safety Degradation
Window, Fault Simulation Window, and Fault Detection and Diagnosis Window (see
Figure 2-11). The following sections describe all the windows in detail and present some
sample results.
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