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Instrumentation Design for HRR Measurements in a Large-Scale Fire Facility

机译:大型消防设施中HRR测量的仪器设计

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Carleton University's experimental atrium and tunnel facilities share a fan chamber and three large exhaust fans. Using oxygen consumption calorimetry, the Heat Release Rates (HRR) of fires in either of these facilities can be calculated. This paper focuses on the design of the instrumentation in the fan chamber, which was carried out using the Fire Dynamics Simulator (FDS) and manual velocity measurements. Due to a high amount of mixing and turbulence and a long travel distance, the temperature and gas concentration profiles are relatively uniform. However, for the same reason, the velocity profile had to be looked at very closely to find an optimum combination of bi-directional probes. The analysis indicated that acceptable HRR measurements can be obtained using an array of six thermocouples, four bidirectional velocity probes and a gas sampling grid. Results from the preliminary tests are presented. The system shows a reasonable estimate of the HRR as compared to the propane calibration burner.
机译:卡尔顿大学的实验性中庭和隧道设施共用一个风扇室和三个大型排气扇。使用耗氧量热法,可以计算出这两个设施中火灾的放热率(HRR)。本文着重于风扇室内仪表的设计,该设计是通过使用火灾动态模拟器(FDS)和手动速度测量进行的。由于大量的混合和湍流以及较长的行进距离,因此温度和气体浓度曲线相对均匀。但是,出于同样的原因,必须非常仔细地观察速度分布图,才能找到双向探头的最佳组合。分析表明,使用六个热电偶,四个双向速度探头和一个气体采样网格可以获得可接受的HRR测量值。显示了初步测试的结果。与丙烷校准燃烧器相比,系统显示出对HRR的合理估算。

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