• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Tunnelling and underground space technology >Theoretical prediction model and full-scale experimental study of central smoke extraction with a uniform smoke rate in a tunnel fire
【24h】

Theoretical prediction model and full-scale experimental study of central smoke extraction with a uniform smoke rate in a tunnel fire

机译：隧道火灾中均匀排烟量集中抽烟的理论预测模型与大规模实验研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A large amount of smoke may be discharged from a smoke extraction damper located close to extraction fans in central smoke extraction systems, which greatly reduces the efficiency and increases the energy consumption. Therefore, we propose the concept of smoke extraction with a uniform smoke rate. Adjusting the damper angle can make the extraction rate uniform for each damper, so the higher temperature smoke can be discharged furthest through the damper nearest the fire. We established theoretical models according to the relationships between the smoke velocities, extraction rate, damper angle, and wind pressure for fans in traditional and uniform systems. Based on the Hong Kong-Zhuhai-Macao immersed tunnel in China, an experimental tunnel with the largest cross section size in the world is constructed. The results showed that in the traditional system, 40-60% of smoke was discharged through the damper nearest to the fan, whereas the extraction rate for each damper could be equalized by controlling the angle in the uniform system and 8-23% of the energy could also be conserved. The results suggested that the damper nearby the fire should be open and the number of dampers can be adjusted to control the smoke spread range and achieve effective energy savings.
机译：中央排烟系统中靠近排风扇的排烟阀可能会排出大量的烟，这大大降低了效率，增加了能耗。因此，我们提出了具有均匀烟雾率的排烟概念。调节风门角度可以使每个风门的抽气率均匀，因此高温烟气可以通过距离火源最近的风门最远地排出。我们根据传统和统一系统中风扇的烟速，抽气速率，风门角度和风压之间的关系建立了理论模型。以中国香港－珠海－澳门的沉管隧道为基础，构造了世界上横截面最大的试验隧道。结果表明，在传统系统中，40-60％的烟雾通过最靠近风扇的风门排出，而通过控制均匀系统中的角度和每个风门的8-23％，可以使每个风门的抽气率相等。能量也可以节省。结果表明，靠近火源的风门应打开，并可以调节风门的数量以控制烟雾扩散范围并实现有效的节能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号