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Building Simulation

, Volume 11, Issue 1, pp 87–101 | Cite as

A Bayesian Network model for predicting cooling load of commercial buildings

  • Sen Huang
  • Wangda Zuo
  • Michael D. Sohn
Research Article Building Systems and Components

Abstract

Cooling load prediction is indispensable to many building energy saving strategies. In this paper, we proposed a new method for predicting the cooling load of commercial buildings. The proposed approach employs a Bayesian Network model to relate the cooling load to outdoor weather conditions and internal building activities. The proposed method is computationally efficient and implementable for use in real buildings, as it does not involve sophisticated mathematical theories. In this paper, we described the proposed method and demonstrated its use via a case study. In this case study, we considered three candidate models for cooling load prediction and they are the proposed Bayesian Network model, a Support Vector Machine model, and an Artificial Neural Network model. We trained the three models with fourteen different training data datasets, each of which had varying amounts and quality of data that were sampled on-site. The prediction results for a testing week shows that the Bayesian Network model achieves similar accuracy as the Support Vector Machine model but better accuracy than the Artificial Neural Network model. Notable in this comparison is that the training process of the Bayesian Network model is fifty-eight times faster than that of the Artificial Neural Network model. The results also suggest that all three models will have much larger prediction deviations if the testing data points are not covered by the training dataset for the studied case (The maximum absolute deviation of the predictions that are not covered by the training dataset can be up to seven times larger than that of the predictions covered by the training dataset). In addition, we also found the uncertainties in the weather forecast significantly affected the accuracy of the cooling load prediction for the studied case and the Support Vector Machine model was more sensitive to those uncertainties than the other two models.

Keywords

Bayesian Network model cooling load prediction training dataset uncertainties 

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Notes

Acknowledgements

This research was supported by the U.S. National Science Foundation under award number IIS-1633338. This research was also supported by the U.S. Department of Defense under the ESTCP program. The authors thank, Ana Carolina Laurini Malara, Marco Bonvini, Michael Wetter, Mary Ann Piette, Jessica Granderson, Oren Schetrit, Rong Lily Hu and Guanjing Lin for the support provided through the research.

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Department of Civil, Architectural and Environmental EngineeringUniversity of MiamiCoral GablesUSA
  2. 2.Energy Analysis and Environmental Impacts DivisionLawrence Berkeley National LaboratoryBerkeleyUSA

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