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Building Simulation 2013, 6(1): 51-67 https://doi.org/10.1007/s12273-012-0093-4
Research Article | Issue | Published: 04 September 2012

Comfort and airflow evaluation in spaces equipped with mixing ventilation and cold radiant floor

Show Author's Information Eusébio Z. E. Conceição1( ),  Mª Manuela J. R. Lúcio1,  Hazim B. Awbi2
Faculty of Science and Technology, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
School of Construction Management & Engineering, University of Reading, Reading, RG6 6AW, UK
Keywords:
thermal comfort, air quality, air distribution index, heat removal efficiency, contaminants removal efficiency and numerical methods
Cite this article:
Conceição EZE, Lúcio MMJR, Awbi HB. Comfort and airflow evaluation in spaces equipped with mixing ventilation and cold radiant floor. Building Simulation, 2013, 6(1): 51-67. https://doi.org/10.1007/s12273-012-0093-4
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Abstract Full text About this article

In this work the comfort and airflow were evaluated for spaces equipped with mixing ventilation and cold radiant floor. In this study the coupling of an integral multi-nodal human thermal comfort model with a computational fluid dynamics model is developed. The coupling incorporates the predicted mean vote (PMV) index, for the heat exchange between the body and the environment, with the ventilation effectiveness to obtain the air distribution index (ADI) for the occupied spaces with non-uniform environments. The integral multi-nodal human thermal comfort model predicts the external skin and clothing surfaces temperatures and the thermal comfort level, while the computational fluid dynamics model evaluates the airflow around the occupants. The air distribution index, that was developed in the last years for uniform environments, has been extended and implemented for non-uniform thermal environments. The airflow inside a virtual chamber equipped with two occupants seated in a classroom desk, is promoted by a mixing ventilation system with supply air of 28 °C and by a cold radiant floor with a surface temperature of 19 °C. The mechanical mixing ventilation system uses a supply and an exhaust diffusers located above the head level on adjacent walls.


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About this article

Comfort and airflow evaluation in spaces equipped with mixing ventilation and cold radiant floor

Show Author's information Eusébio Z. E. Conceição1( ), Mª Manuela J. R. Lúcio1, Hazim B. Awbi2
Faculty of Science and Technology, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
School of Construction Management & Engineering, University of Reading, Reading, RG6 6AW, UK

Abstract

In this work the comfort and airflow were evaluated for spaces equipped with mixing ventilation and cold radiant floor. In this study the coupling of an integral multi-nodal human thermal comfort model with a computational fluid dynamics model is developed. The coupling incorporates the predicted mean vote (PMV) index, for the heat exchange between the body and the environment, with the ventilation effectiveness to obtain the air distribution index (ADI) for the occupied spaces with non-uniform environments. The integral multi-nodal human thermal comfort model predicts the external skin and clothing surfaces temperatures and the thermal comfort level, while the computational fluid dynamics model evaluates the airflow around the occupants. The air distribution index, that was developed in the last years for uniform environments, has been extended and implemented for non-uniform thermal environments. The airflow inside a virtual chamber equipped with two occupants seated in a classroom desk, is promoted by a mixing ventilation system with supply air of 28 °C and by a cold radiant floor with a surface temperature of 19 °C. The mechanical mixing ventilation system uses a supply and an exhaust diffusers located above the head level on adjacent walls.

Keywords: thermal comfort, air quality, air distribution index, heat removal efficiency, contaminants removal efficiency and numerical methods

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Publication history
Copyright
Acknowledgements

Publication history

Received: 07 September 2011
Revised: 26 June 2012
Accepted: 16 July 2012
Published: 04 September 2012
Issue date: March 2013

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012

Acknowledgements

This research activity is being developed inside a project approved and financed by the FCT and POCI 2010, sponsored by the European Community Fund FEDER.

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