Experimental and numerical expression of CO concentration change with height in enclosed parking lots

Providing adequate air quality is an important challenge in enclosed parking lots. Hence, increase of ventilation flow is necessary to improve air quality in these places but not sufficient. According to recent researches, the necessary and sufficient conditions for development of good air quality in enclosed parking lots are both adequate ventilation flow and enhancing the heights of exhaust vents. For investigating this claim, in this paper, the change of CO concentration with height in an enclosed parking lot was investigated both numerically and experimentally. The CO concentration in various heights is obtained numerically, using OpenFoam software, and compared with that of measured experimental data Good agreement between numerical and experimental results was obtained. The maximum CO concentration in studied parking lot was obtained within the non-dimensional height range of 0.60.7. Furthermore, the CO variation with height in three different enclosed parking lots was also studied and numerical and experimental results were compared. Based on the results, the maximum CO concentration was also occurred within the non- dimensional height range of 0.60.7.