Study on ventilation efficiency in underground car park: Part 1 Field measurement of age of air.

airbase... [753Kb]
Kondo Y, Tadokoro Y, Yoshino H, Imai T
ventilation efficiency, underground car park, parking garage
Year:
2000
Bibliographic info:
in: "Progress in Modern Ventilation", Proceedings of Ventilation 2000, Volume 2, proceedings of the 6th International Symposium on Ventilation for Contaminant Control, held Helsinki, Finland, 4-7 June 2000, Finnish Institute of Occupational Health

This paper presents the field experiments on the ventilation efficiency in an underground car park where high velocity fan-diffuser units were installed as shown in Photo 1. The concentration of SF6 were measured as tracer gas under the step up condition and the step down condition, and the ventilation efficiency such as the age of air were calculated from the rising curve and the falling curve of the SF6 concentration in the underground car park. The ventilation efficiencies of two cases were compared, i.e. in Case 1 the fan-diffuser units were operated, and in Case 2 they were not operated.

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