Journal
BUILDING AND ENVIRONMENT
Volume 46, Issue 8, Pages 1558-1566Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.buildenv.2011.01.017
Keywords
Building energy efficiency; HVAC system; Spatial and temporal partitions; Cross-level fault detection
Funding
- CITRIS Seed
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This paper presents a cross-level fault detection method. Two key features of the proposed method are 1) an energy description of all the units in an HVAC system and 2) a spatial temporal partition strategy, which allows us to apply the FDD strategy to the entire building in a uniform manner. Energy flow models for HVAC units at all levels are presented. The concept of absolute and relative references for monitoring the energy performance is introduced. We have discussed the inherent complexity of HVAC systems, and proposed a grouping strategy of VAVs via correlation analysis. Examples of the temporal and spatial partitions are presented. Numerical examples are given to demonstrate the cross-level detection of two faults on AHU level and one fault on VAV level. (C) 2011 Elsevier Ltd. All rights reserved.
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