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Automated proactive fault isolation: a key to automated commissioning.

Author(s) : KATIPAMULA BRAMBLEY M.

Summary

In this paper, the author presents a generic model for automated continuous commissioning and then delves in detail into one of the processes, proactive testing for fault isolation, which is key to automating commissioning. The automated commissioning process uses passive observation-based fault detection and diagnostic techniques, followed by automated proactive testing for fault isolation, automated fault evaluation, and automated reconfiguration of controls to continuously keep equipment controlled and running as intended. Only when hard failures occur or a physical replacement is required does the process require human intervention, and then sufficient information is provided by the automated commissioning system to target manual maintenance where it is needed. We then focus on fault isolation by presenting detailed logic that can be used to automatically isolate faults in valves, a common component in HVAC systems, as an example of how automated proactive fault isolation can be accomplished. Although automated passive fault detection and diagnostics have been tested in the field on actual equipment, the proactive process described in this paper has only been tested against simulations and has not yet been field tested. We conclude the paper with a discussion of how this approach to isolating faults can be applied to other common HVAC components and their automated commissioning, followed by a summary of key conclusions of the paper.

Details

  • Original title: Automated proactive fault isolation: a key to automated commissioning.
  • Record ID : 2008-1608
  • Languages: English
  • Source: ASHRAE Transactions. 2007 Annual Meeting, Long Beach, CA. Volume 113, part 2 + CD-ROM.
  • Publication date: 2007/06/23

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