关于城市供暖局限空间中的甲扩散分布规律的数值模拟研究 地下管道沟 地下管道沟
Heng Zhang1, Yan Liu1, Juntong Liu1
1Occupational Hazards Control Technology Center, Beijing Academy of Science and Technology Institute of Urban Safety and Environmental Science, Beijing 100054, China.
ACS omega
|April 14, 2025
概括
这项研究模拟了地下加热管道沟中的甲扩散. 机械通风在降低气体度方面被证明是最有效的,提高了狭窄空间的安全性.
科学领域:
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
- 安全工程安全工程
背景情况:
- 市政供暖管道沟可以积累有害气体.
- 了解气体扩散对于工人安全和系统完整性至关重要.
研究的目的:
- 为了研究地下管道沟中的甲扩散规律.
- 评估通风策略和气体释放率对天然气分配的影响.
主要方法:
- 使用CFD模拟软件创建了一个1:1规模的市政供暖地下管道沟模型.
- 在现场进行实验,以验证模拟结果.
主要成果:
- 气体流在底部更有活力,导致温度分层.
- 在封闭条件下,甲呈现垂直分层,随着距离的增长而减少.
- 自然通风减少了甲含量,但通风方向影响了分散.
- 甲度遵循线性和指数式增长,分别在封闭和自然通风状态下释放率.
- 机械通风显著且快速降低甲水平.
结论:
- 通风策略极大地影响了管道沟中的气体扩散和度.
- 结果为封闭空间通风设计,报警系统和运营安全协议提供了洞察力.
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