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CFD model-based natural ventilation control – the possibility, strategies, and potential

Zhang, Y and Ji, Y 2007, CFD model-based natural ventilation control – the possibility, strategies, and potential , in: the 10th International Conference on Air Distribution in Rooms (Roomvent 2007), 3–15 June 2007, Helsinki, Finland.

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    Abstract

    This paper investigates the potential of CFD-based control strategies. The simple model of an open-plan office is used to demonstrate the case for buoyancy combined wind-driven natural ventilation. Three control strategies are compared: a feed-forward control based on the steadystate analysis of the ventilated space; a feedback control with arbitrary control rules; and a transient CFD model-based predictive control strategy. The simulation results show that: (1) owing to the non-linearity of the system, feed-forward control strategy that uses stead-state simulation results as references may lead to significant control errors; (2) Although even with simple arbitrary rules, the feedback control can deliver slightly better results than the feedforward control, the scope of improvement is limited and would become more and more difficult to achieve with the increase of complexity of real buildings; (3) model-based control strategy is the preferred solution, especially when means are available for accurate wind speed prediction. The potentials and barriers for the application of online model-based control and the necessary future development are discussed in the final part of the paper.

    Item Type: Conference or Workshop Item (Paper)
    Themes: Built and Human Environment
    Schools: Colleges and Schools > College of Science & Technology
    Colleges and Schools > College of Science & Technology > School of the Built Environment
    Colleges and Schools > College of Science & Technology > School of the Built Environment > Urban Quality Research Centre (UQRC)
    Journal or Publication Title: Proceedings of the 10th International Conference on Air Distribution in Rooms
    Refereed: Yes
    Related URLs:
    Depositing User: Dr Yingchun Ji
    Date Deposited: 01 Jun 2011 10:48
    Last Modified: 20 Aug 2013 17:53
    URI: http://usir.salford.ac.uk/id/eprint/15867

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