کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
589726 878717 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of the applicable exhaust airflow rate through a ventilation shaft in the case of road tunnel fires
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Determination of the applicable exhaust airflow rate through a ventilation shaft in the case of road tunnel fires
چکیده انگلیسی

In this study, a model experiment in a long road tunnel employing the longitudinal ventilation system with a ventilation shaft is carried out during a fire accident to determine the optimum exhaust airflow rate through the ventilation shaft. The appropriate operation of the shaft fan according to the position of fire is investigated, and the optimum exhaust airflow rate for prevention of smoke spreading through the tunnel is determined based on the entire exhaust of both smoke and airflow generated by fire and jet fan operation, respectively. As a result of using the amount of smoke, the critical air velocity produced by jet fans, the effective cross-sectional area of a tunnel and the correction factor, a formula for exhaust airflow rate is drived. In addition, a correction factor (α = 1.1) for the thermal expansion caused by heat of a 20 MW fire is determined theoretically and experimentally. It is expected that this study will contribute to plan the shaft operation for the emergency ventilation as well as provide the preliminary data to design the airflow rate of shaft.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Safety Science - Volume 48, Issue 6, July 2010, Pages 722–728
نویسندگان
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