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Experimental determination of fire heat release rate with OC and CDG calorimetry for ventilated compartments fire scenario

机译:OC和CDG量热法测定通风室火灾场景的火热释放率的实验确定

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摘要

This research deals with the experimental determination of the heat release rate (HRR) of fires in mechanically ventilated compartments based on oxygen consumption (OC) and carbon dioxide generation (CDG) calorimetry. It proposes formulations for fire in force-ventilated compartments on the same basis as the relations established for hood calorimetry in an open atmosphere but considering inertia and unsteady behavior of the fire via the time variation mass of O_2 and CO_2 in the compartment. The value of the new formulations of HRR has been tested in two series of propane gas fire experiments performed in a large-scale facility. The first series involves a fire scenario with one compartment, and the second series, a fire scenario with three compartments connected to each other by doorways. In the first test series, the OC and CDG formulations for HRR are assessed. In the second test series, the OC and CDG formulations are presented with two approaches to definition of the control volume: approach involving three rooms and the flow rate in the ventilation network and approach involving only the fire room and the flow rate through the doorways. On the basis of the fire experiments considered, the most accurate method (accuracy to within 10%) for determining the HRR is the CDG formulation with approach for the control volume without considering the flow rates at the doorways. This analysis points out the different features of each method (OC and CDG) and thoroughly discusses their advantages and drawbacks. The overall analysis allows guidelines to be formulated for fire HRR calculation in confined and ventilated compartments.
机译:这项研究涉及基于氧气消耗量(OC)和二氧化碳生成(CDG)量热法的机械通风室中火灾的放热率(HRR)的实验确定。提出了与通风环境中的罩量热法建立的关系相同的基础上的强制通风车厢中的火灾公式,但考虑了通过车厢中O_2和CO_2随时间变化的质量,火灾的惯性和不稳定情况。新的HRR配方的价值已在大型工厂进行的两个系列的丙烷气燃烧实验中进行了测试。第一个系列涉及具有一个隔室的火灾场景,第二系列涉及具有三个隔室的门之间相互连接的火灾场景。在第一个测试系列中,评估了HRR的OC和CDG配方。在第二个测试系列中,OC和CDG公式用两种方法来定义控制量:涉及三个房间的方法和通风网络中的流量,以及仅涉及防火室和通过门口的流量的方法。根据所考虑的防火实验,确定HRR的最准确方法(准确度在10%以内)是CDG配方,采用控制体积的方法而不考虑门口的流速。该分析指出了每种方法(OC和CDG)的不同特征,并彻底讨论了它们的优缺点。整体分析可以为密闭和通风室内的火灾HRR计算制定准则。

著录项

  • 来源
    《Fire and materials》 |2014年第4期|474-506|共33页
  • 作者单位

    Institut de Radioprotection et de Surete Nucleaire (IRSN), PSN-RES/SA2I, Laboratoire Commun ETIC, Centre de Cadarache, 13115 Cedex, St Paul-lez-Durance, France;

    Institut de Radioprotection et de Surete Nucleaire (IRSN), PSN-RES/SA2I, Laboratoire Commun ETIC, Centre de Cadarache, 13115 Cedex, St Paul-lez-Durance, France;

    Institut de Radioprotection et de Surete Nucleaire (IRSN), PSN-RES/SA2I, Laboratoire Commun ETIC, Centre de Cadarache, 13115 Cedex, St Paul-lez-Durance, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    compartment fires; heat release rate; calorimetry; mechanical ventilation;

    机译:车厢起火;放热率量热法机械通风;
  • 入库时间 2022-08-18 00:11:08

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