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Research Article

Influence of input data on airflow network accuracy in residential buildings with natural wind- and stack-driven ventilation

Krzysztof Arendt1,2( ), Marek Krzaczek1, Jacek Tejchman1
Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, 80-233 Gdańsk, Narutowicza 11/12, Poland
University of Southern Denmark, Center for Energy Informatics, Odense, Denmark
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Abstract

The airflow network (AFN) modeling approach provides an attractive balance between the accuracy and computational demand for naturally ventilated buildings. Its accuracy depends on input parameters such as wind pressure and opening discharge coefficients. In most cases, these parameters are obtained from secondary sources which are solely representative for very simplified buildings, i.e. for buildings without facade details. Although studies comparing wind pressure coefficients or discharge coefficients from different sources exist, the knowledge regarding the effect of input data on AFN is still poor. In this paper, the influence of wind pressure data on the accuracy of a coupled AFN-BES model for a real building with natural wind- and stack-driven ventilation was analyzed. The results of 8 computation cases with different wind pressure data from secondary sources were compared with the measured data. Both the indoor temperatures and the airflow were taken into account. The outcomes indicated that the source of wind pressure data had a significant influence on the model performance.

Keywords

natural ventilationairflow network modelnumerical calculationspivoted windowwind pressure

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Building Simulation
Volume 10 Issue 2,
April 2017
Pages 229-238
DOI: 10.1007/s12273-016-0320-5
Cite this article:
Arendt K, Krzaczek M, Tejchman J. Influence of input data on airflow network accuracy in residential buildings with natural wind- and stack-driven ventilation. Building Simulation, 2017, 10(2): 229-238. https://doi.org/10.1007/s12273-016-0320-5

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Received: 04 April 2016
Revised: 27 May 2016
Accepted: 04 August 2016
Published: 06 September 2016
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016
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