Ventilation Systems

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Laurent Ricciardi - One of the best experts on this subject based on the ideXlab platform.

  • Reduced-scale study of wind influence on mean airflows inside buildings equipped with Ventilation Systems
    Building and Environment, 2012
    Co-Authors: Nicolás Roux, Xavier Faure, Sandrine Soares, Christian Inard, Laurent Ricciardi
    Abstract:

    Abstract To study mass transfers inside buildings equipped with Ventilation Systems, a methodology has been developed to carry out reduced-scale experiments for studying isothermal flows in a steady or a transient state. This methodology has been numerically and experimentally validated on simple configurations and applied to two reference configurations representative of nuclear facilities. The wind influence on mass transfers inside these configurations, in nominal, damaged (Ventilation stopped) or accidental (internal overpressure) situations, has been studied by carrying out wind tunnel experiments. The objectives of this article are to present the scaling-down methodology and the main experimental results concerning the influence of wind on steady-state airflows inside the reduced-scale models. It is notably shown that wind effects can lead to a partial or a total loss of the pollutant containment inside buildings. The reliability of the zonal code SYLVIA, which is used to support safety assessments in nuclear facilities, has then been analysed from these experimental results.

  • Reduced-scale study of wind influence on mean airflows inside buildings equipped with Ventilation Systems
    Building and Environment, 2012
    Co-Authors: Nicolás Roux, Xavier Faure, Sandrine Soares, Christian Inard, Laurent Ricciardi
    Abstract:

    To study mass transfers inside buildings equipped with Ventilation Systems, a methodology has been developed to carry out reduced-scale experiments for studying isothermal flows in a steady or a transient state. This methodology has been numerically and experimentally validated on simple configurations and applied to two reference configurations representative of nuclear facilities. The wind influence on mass transfers inside these configurations, in nominal, damaged (Ventilation stopped) or accidental (internal overpressure) situations, has been studied by carrying out wind tunnel experiments. The objectives of this article are to present the scaling-down methodology and the main experimental results concerning the influence of wind on steady-state airflows inside the reduced-scale models. It is notably shown that wind effects can lead to a partial or a total loss of the pollutant containment inside buildings. The reliability of the zonal code SYLVIA, which is used to support safety assessments in nuclear facilities, has then been analysed from these experimental results. © 2012 Elsevier Ltd.

Nicolás Roux - One of the best experts on this subject based on the ideXlab platform.

  • Reduced-scale study of wind influence on mean airflows inside buildings equipped with Ventilation Systems
    Building and Environment, 2012
    Co-Authors: Nicolás Roux, Xavier Faure, Sandrine Soares, Christian Inard, Laurent Ricciardi
    Abstract:

    Abstract To study mass transfers inside buildings equipped with Ventilation Systems, a methodology has been developed to carry out reduced-scale experiments for studying isothermal flows in a steady or a transient state. This methodology has been numerically and experimentally validated on simple configurations and applied to two reference configurations representative of nuclear facilities. The wind influence on mass transfers inside these configurations, in nominal, damaged (Ventilation stopped) or accidental (internal overpressure) situations, has been studied by carrying out wind tunnel experiments. The objectives of this article are to present the scaling-down methodology and the main experimental results concerning the influence of wind on steady-state airflows inside the reduced-scale models. It is notably shown that wind effects can lead to a partial or a total loss of the pollutant containment inside buildings. The reliability of the zonal code SYLVIA, which is used to support safety assessments in nuclear facilities, has then been analysed from these experimental results.

  • Reduced-scale study of wind influence on mean airflows inside buildings equipped with Ventilation Systems
    Building and Environment, 2012
    Co-Authors: Nicolás Roux, Xavier Faure, Sandrine Soares, Christian Inard, Laurent Ricciardi
    Abstract:

    To study mass transfers inside buildings equipped with Ventilation Systems, a methodology has been developed to carry out reduced-scale experiments for studying isothermal flows in a steady or a transient state. This methodology has been numerically and experimentally validated on simple configurations and applied to two reference configurations representative of nuclear facilities. The wind influence on mass transfers inside these configurations, in nominal, damaged (Ventilation stopped) or accidental (internal overpressure) situations, has been studied by carrying out wind tunnel experiments. The objectives of this article are to present the scaling-down methodology and the main experimental results concerning the influence of wind on steady-state airflows inside the reduced-scale models. It is notably shown that wind effects can lead to a partial or a total loss of the pollutant containment inside buildings. The reliability of the zonal code SYLVIA, which is used to support safety assessments in nuclear facilities, has then been analysed from these experimental results. © 2012 Elsevier Ltd.

Vittorio Verda - One of the best experts on this subject based on the ideXlab platform.

  • calculation and design of tunnel Ventilation Systems using a two scale modelling approach
    Building and Environment, 2009
    Co-Authors: Francesco Colella, Guillermo Rein, Romano Borchiellini, Ricky Carvel, Jose L Torero, Vittorio Verda
    Abstract:

    This paper develops a novel modelling approach for Ventilation flow in tunnels at ambient conditions (i.e. cold flow). The complexity of full CFD models of flow in tunnels or the inaccuracies of simplistic assumptions are avoided by efficiently combining a simple, mono-dimensional approach to model tunnel regions where the flow is fully developed, with detailed CFD solutions where flow conditions require 3D resolution. This multi-scale method has not previously been applied to tunnel flows. The low computational cost of this method is of great value when hundreds of possible Ventilation scenarios need to be studied. The multi-scale approach is able to provide detailed local flow conditions, where required, with a significant reduction in the overall computational time. The coupling procedures and the numerical error induced by this new approach are studied and discussed. The paper describes a comparison between numerical results and experimental data recorded within a real tunnel underlining how the developed methodology can be used as a valid design tool for any tunnel Ventilation system. This work sets the foundations for the coupling of fire-induced flows and Ventilation Systems where further complexities are introduced by the hot gas plume and smoke stratification.

Xavier Faure - One of the best experts on this subject based on the ideXlab platform.

  • Reduced-scale study of wind influence on mean airflows inside buildings equipped with Ventilation Systems
    Building and Environment, 2012
    Co-Authors: Nicolás Roux, Xavier Faure, Sandrine Soares, Christian Inard, Laurent Ricciardi
    Abstract:

    Abstract To study mass transfers inside buildings equipped with Ventilation Systems, a methodology has been developed to carry out reduced-scale experiments for studying isothermal flows in a steady or a transient state. This methodology has been numerically and experimentally validated on simple configurations and applied to two reference configurations representative of nuclear facilities. The wind influence on mass transfers inside these configurations, in nominal, damaged (Ventilation stopped) or accidental (internal overpressure) situations, has been studied by carrying out wind tunnel experiments. The objectives of this article are to present the scaling-down methodology and the main experimental results concerning the influence of wind on steady-state airflows inside the reduced-scale models. It is notably shown that wind effects can lead to a partial or a total loss of the pollutant containment inside buildings. The reliability of the zonal code SYLVIA, which is used to support safety assessments in nuclear facilities, has then been analysed from these experimental results.

  • Reduced-scale study of wind influence on mean airflows inside buildings equipped with Ventilation Systems
    Building and Environment, 2012
    Co-Authors: Nicolás Roux, Xavier Faure, Sandrine Soares, Christian Inard, Laurent Ricciardi
    Abstract:

    To study mass transfers inside buildings equipped with Ventilation Systems, a methodology has been developed to carry out reduced-scale experiments for studying isothermal flows in a steady or a transient state. This methodology has been numerically and experimentally validated on simple configurations and applied to two reference configurations representative of nuclear facilities. The wind influence on mass transfers inside these configurations, in nominal, damaged (Ventilation stopped) or accidental (internal overpressure) situations, has been studied by carrying out wind tunnel experiments. The objectives of this article are to present the scaling-down methodology and the main experimental results concerning the influence of wind on steady-state airflows inside the reduced-scale models. It is notably shown that wind effects can lead to a partial or a total loss of the pollutant containment inside buildings. The reliability of the zonal code SYLVIA, which is used to support safety assessments in nuclear facilities, has then been analysed from these experimental results. © 2012 Elsevier Ltd.

Christian Inard - One of the best experts on this subject based on the ideXlab platform.

  • Reduced-scale study of wind influence on mean airflows inside buildings equipped with Ventilation Systems
    Building and Environment, 2012
    Co-Authors: Nicolás Roux, Xavier Faure, Sandrine Soares, Christian Inard, Laurent Ricciardi
    Abstract:

    Abstract To study mass transfers inside buildings equipped with Ventilation Systems, a methodology has been developed to carry out reduced-scale experiments for studying isothermal flows in a steady or a transient state. This methodology has been numerically and experimentally validated on simple configurations and applied to two reference configurations representative of nuclear facilities. The wind influence on mass transfers inside these configurations, in nominal, damaged (Ventilation stopped) or accidental (internal overpressure) situations, has been studied by carrying out wind tunnel experiments. The objectives of this article are to present the scaling-down methodology and the main experimental results concerning the influence of wind on steady-state airflows inside the reduced-scale models. It is notably shown that wind effects can lead to a partial or a total loss of the pollutant containment inside buildings. The reliability of the zonal code SYLVIA, which is used to support safety assessments in nuclear facilities, has then been analysed from these experimental results.

  • Reduced-scale study of wind influence on mean airflows inside buildings equipped with Ventilation Systems
    Building and Environment, 2012
    Co-Authors: Nicolás Roux, Xavier Faure, Sandrine Soares, Christian Inard, Laurent Ricciardi
    Abstract:

    To study mass transfers inside buildings equipped with Ventilation Systems, a methodology has been developed to carry out reduced-scale experiments for studying isothermal flows in a steady or a transient state. This methodology has been numerically and experimentally validated on simple configurations and applied to two reference configurations representative of nuclear facilities. The wind influence on mass transfers inside these configurations, in nominal, damaged (Ventilation stopped) or accidental (internal overpressure) situations, has been studied by carrying out wind tunnel experiments. The objectives of this article are to present the scaling-down methodology and the main experimental results concerning the influence of wind on steady-state airflows inside the reduced-scale models. It is notably shown that wind effects can lead to a partial or a total loss of the pollutant containment inside buildings. The reliability of the zonal code SYLVIA, which is used to support safety assessments in nuclear facilities, has then been analysed from these experimental results. © 2012 Elsevier Ltd.