Peer-Reviewed Journal Details
Mandatory Fields
Mullen, D. T. and Keane, M. M. and Geronc, M. and Monaghan, R. F. D.
2015
July
Automatic extraction of reduced-order models from CFD simulations for building energy modelling
Published
()
Optional Fields
99
313
326
Accurate modelling of the internal climate of buildings is essential if building energy management systems (BEMS) are to efficiently maintain adequate thermal comfort. Computational fluid dynamics (CFD) models are usually utilised to predict internal climate. Nevertheless CFD models, although providing the necessary level of accuracy, are highly computationally expensive, and cannot practically be integrated in BEMS. This paper presents and describes validation of a CFD-ROM method for real-time simulations of building thermal performance. The CFD-ROM method involves the automatic extraction and solution of reduced order models (ROMs) from validated CFD simulations. ROMs are shown to be adequately accurate with a total error below 5\% and to retain satisfactory representation of the phenomena modelled. Each ROM has a time to solution under 20 s, which opens the potential of their integration with BEMS, giving real-time physics-based building energy modelling. A parameter study was conducted to investigate the applicability of the extracted ROM to initial boundary conditions different from those from which it was extracted. The results show that the ROMs retained satisfactory total errors when the initial conditions in the room were varied by +/- 5 degrees C. This allows the production of a finite number of ROMs with the ability to rapidly model many possible scenarios. (C) 2015 Elsevier B.V. All rights reserved.
10.1016/j.enbuild.2015.04.015
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