Numerical Simulation of Mechanical Ventilation and CO Distribution in Underground Garages

Sifan Zhou

doi:10.54691/v60vwn11

Authors

Sifan Zhou

DOI:

https://doi.org/10.54691/v60vwn11

Keywords:

Underground Garage; CO Distribution; Numerical Simulation; Mechanical Ventilation.

Abstract

This study investigates the CO concentration distribution and airflow characteristics in a residential double-level underground garage under different ventilation conditions using numerical simulation. The realizable k-ε turbulence model was employed with the SIMPLE algorithm for iterative solution. Results show that natural ventilation is insufficient to effectively control pollutant levels, with CO distribution being significantly non-uniform. Under mechanical ventilation, increasing the air change rate enhances airflow uniformity, reduces CO concentrations from 6.4 to 9.6 ppm to 3.2 to 6.4 ppm, and improves pollutant removal efficiency. The findings provide practical guidance for ventilation system design in underground garage environments.

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