排气流量校准大规模热量测量系统使用痕迹气稀释器的排气流量校准
1Fire Research Division, National Institute of Standards and Technology, Gaithersburg, Maryland, USA.
概括
标志性气体稀释 (TGD) 在大型火灾实验中校准排气流量测量. 这种方法减少了热释放率测量的不确定性,提高了高达6%的精度.
科学领域:
- 消防科学 消防科学 消防科学
- 热量测量方法热量测量方法
- 测量不确定性 测量不确定性
背景情况:
- 排气流量测量对大规模火灾实验的热释放率计算产生了显著的不确定性.
- 排气管中的不规则流量分布使精确的流量测量变得复杂.
研究的目的:
- 为了在线校准流量测量设备,应用标记气体稀释 (TGD).
- 为了减少在大型开放热量计系统中排气流量测量的不确定性.
主要方法:
- 使用痕迹气稀释 (TGD),一种流量分布不敏感的方法,用于体积流量测量.
- 在大型开放热量计系统的排气管道上对流量测量装置进行线路校准.
主要成果:
- 在线校准将排气流量测量偏差降低了多达6%.
- 提高了热释放率的整体测量精度.
- 证明流量校准优于传统方法,比较氧气消耗热量计与气体燃烧器输出.
结论:
- 标志性气体稀释校准可提高大规模火灾实验中的热释放率测量的准确性.
- 经过验证的流量校准方法在各种流量条件下有效.
- 这种方法将氧气消耗热量计与与气燃机释放热率确定相关的错误分离开来.
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