主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (2): 197-201.

• • 上一篇    下一篇

盖下列检库射流风机与机械排烟系统协同排烟效果分析

杨 林1，董海广2，许淑惠1   

  1. （1.北京建筑大学 北京市建筑能源高效综合利用工程技术研究中心，北京 100044；2.中铁第五勘察设计院集团有限公司，北京 102600）
  • 出版日期:2023-02-15 发布日期:2023-02-17
  • 作者简介:作者简介：杨 林（1997— ），男，北京建筑大学硕士研究生，主要从事地下建筑消防与安全研究，北京市西城区展览馆路1号北京建筑大学，100044。
  • 基金资助:
    中铁第五勘察设计集团有限公司项目（T5Y2019-C14）；住房和城乡建设部研究开发项目（市政公用-管线2018-03）

Analysis on the effect of the mechanical smoke exhaust of the underground train maintenance warehouse with jet fans in coordination

Yang lin1, Dong Haiguang2, Xu Shuhui1   

  1. (1. Beijing Engineering Research Center of Sustainable Energy and Buildings, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2. China Railway Fifth Exploration and Design Institute Co., Ltd. Beijing 102600，China)
  • Online:2023-02-15 Published:2023-02-17

摘要： 应用FDS软件对某典型上盖开发式动车车辆段的盖下列检库射流风机与机械排烟系统协同排烟效果进行了模拟研究。通过分析火灾时烟气扩散速度、烟气层分布特征、一氧化碳浓度分布以及排烟效率等指标，对射流风机协同机械排烟和单独机械排烟的排烟效果进行对比研究。研究表明：射流风机协同机械排烟可有效减慢烟气的扩散速度，并且可降低库内大部分区域的烟层厚度，增加排烟口处的局部烟层厚度，以提高机械排烟系统的排烟效率。与单独的机械排烟工况中排烟效率相比，射流风机协同排烟将最不利排烟效率从33.1%提升至53.9%，最佳排烟效率从44.3%提升至55.1%。且在射流风机协同排烟工况中，对于库内一氧化碳的沉降控制和排烟效率，开启两组射流风机且距火源近端的风机组与相近排烟支管距离为风机的有效射程时效果最佳，且随火源远端风机组的向下倾斜射流角度逐渐增大至与水平面呈45°夹角，一氧化碳的沉降控制效果和排烟效率都提升。

Abstract: The FDS software is used to simulate and study the coordinated exhaust effect of the jet fan and the mechanical exhaust system of an underground train maintenance warehouse. By analyzing the smoke diffusion velocity, the distribution characteristics of the smoke layer, the distribution of CO concentration and the smoke exhaust efficiency during the fire, the smoke exhaust effects of the jet fan in coordination with the mechanical smoke exhaust and the single mechanical smoke exhaust are compared and studied. Studies show that the jet fan in coordination with mechanical exhaust can effectively slow down the diffusion rate of smoke, and can reduce the thickness of the smoke layer in most areas of the warehouse, and increase the thickness of the local smoke layer at the exhaust port to improve the exhaust efficiency of the mechanical smoke exhaust system. Compared with the smoke exhaust efficiency in the single mechanical smoke exhaust condition, the most unfavorable smoke exhaust efficiency increased from 33.1% to 53.9%, and the best smoke exhaust efficiency also increased from 44.3% to 55.1%. In addition, under the condition of cooperating smoke exhaust with jet fans, for the CO deposition control and smoke exhaust efficiency in the warehouse, the effect is optimal when two sets of jet fans are turned on and the distance between the fan group near the fire source and the nearby smoke exhaust branch pipe is in the effective range of the fan. And as the angle of the downwardly inclined jet from the fan unit at the far end of the fire source gradually increases to an angle of 45° with the horizontal plane, the control effect of CO deposition and the smoke exhaust efficiency are improved.

Key words: underground maintenance warehouse, jet fan, mechanical smoke exhaust, synergistic smoke exhaust