CFD Analysis of Oxygen and Carbon Dioxide Recovery during Ventilation in Municipal Confined Space

DOI

10.2991/jrarc.2016.6.4.2How to use a DOI?

Keywords

CFD; numerical simulation; municipal confined space; ventilation; oxygen content

Abstract

Confined space is a special working place. To ensure the safety, the forced ventilation must be carried out before entering the confined space. In this paper, ventilation process in municipal heating confine space is simulated by CFD numerical simulation method, and the distribution of temperature, oxygen and carbon dioxide in municipal heating confined space during ventilation process is studied. The simulation results show that the airflow and temperature are obviously stratified in vertical direction during the ventilation. The temperature is low and the airflow velocity is high at the bottom part of the tunnel. While the temperature is high and the airflow velocity is low at the top of the tunnel. By contrast, recovery of the oxygen and carbon dioxide content is relatively faster at the bottom than it at the top. When the ventilation volume flow rates are 6000 m³·h⁻¹, 8000 m³·h⁻¹, 10000 m³·h⁻¹, 12000 m³·h⁻¹, and 14000 m³·h⁻¹ respectively, the time when the temperature reach stable and gas fraction return to normal are 45 minutes, 32 minutes, 22 minutes, 15 minutes, 10 minutes respectively.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - JOUR
AU  - Yan Liu
AU  - Cong Tan
AU  - Dongliang Liu
PY  - 2016
DA  - 2016/12/30
TI  - CFD Analysis of Oxygen and Carbon Dioxide Recovery during Ventilation in Municipal Confined Space
JO  - Journal of Risk Analysis and Crisis Response
SP  - 178
EP  - 185
VL  - 6
IS  - 4
SN  - 2210-8505
UR  - https://doi.org/10.2991/jrarc.2016.6.4.2
DO  - 10.2991/jrarc.2016.6.4.2
ID  - Liu2016
ER  -