Abstract
The continuous accumulation of operational data has provided an ideal platform to devise and implement customized data analytics for smart HVAC fault detection and diagnosis. In practice, the potentials of advanced supervised learning algorithms have not been fully realized due to the lack of sufficient labeled data. To tackle such data challenges, this study proposes a graph neural network-based approach to effectively utilizing both labeled and unlabeled operational data for optimum decision-makings. More specifically, a graph generation method is proposed to transform tabular building operational data into association graphs, based on which graph convolutions are performed to derive useful insights for fault classifications. Data experiments have been designed to evaluate the values of the methods proposed. Three datasets on HVAC air-side operations have been used to ensure the generalizability of results obtained. Different data scenarios, which vary in training data amounts and imbalance ratios, have been created to comprehensively quantify behavioral patterns of representative graph convolution networks and their architectures. The research results indicate that graph neural networks can effectively leverage associations among labeled and unlabeled data samples to achieve an increase of 2.86%–7.30% in fault classification accuracies, providing a novel and promising solution for smart building management.
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Abbreviations
- AHU:
-
air handling units
- Cheb:
-
Chebyshev network
- FCNN:
-
fully connected neural network
- FDD:
-
fault detection and diagnosis
- GAT:
-
graph attention network
- GCN:
-
graph convolution network
- GCN2:
-
graph convolution network with initial residual connections and identity mapping
- GNN:
-
graph neural network
- HVAC:
-
heating, ventilation and air-conditioning
- SAGE:
-
graph sample and aggregate network
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Acknowledgements
The authors gratefully acknowledge the support of this research by the National Natural Science Foundation of China (No. 52278117), the Philosophical and Social Science Program of Guangdong Province, China (GD22XGL20) and the Shenzhen Science and Technology Program (No. 20220531101800001 and No. 20220810160221001).
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Cheng Fan: conceptualization, methodology, software, writing—original draft preparation, writing—reviewing & editing. Yiwen Lin: formal analysis, investigation. Marco Savino Piscitelli: methodology, visualization. Roberto Chiosa: methodology, visualization. Huilong Wang: writing—reviewing & editing, project administration. Alfonso Capozzoli: methodology. Yuanyuan Ma: data curation, software.
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Fan, C., Lin, Y., Piscitelli, M.S. et al. Leveraging graph convolutional networks for semi-supervised fault diagnosis of HVAC systems in data-scarce contexts. Build. Simul. 16, 1499–1517 (2023). https://doi.org/10.1007/s12273-023-1041-1
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DOI: https://doi.org/10.1007/s12273-023-1041-1