Study on Improvement of Air Quality in Smoking Areas of Restaurants : Part 2-Experiments and Moving-Body CFD Simulation on Combined System of Local Ventilation and Displacement Ventilation

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  • 飲食店の喫煙区域における空気環境改善に関する研究 : 第2報-実験および移動物体CFD解析による局所-置換併用換気システムの検討
  • インショクテン ノ キツエン クイキ ニ オケル クウキ カンキョウ カイゼン ニ カンスル ケンキュウ(ダイ2ホウ)ジッケン オヨビ イドウブツタイ CFD カイセキ ニ ヨル キョクショ-チカン ヘイヨウ カンキ システム ノ ケントウ

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Abstract

In smoking areas of restaurants, smokers and nonsmokers are often seated at the same table. Under such conditions, nonsmokers are exposed to the tobacco smoke in the atmosphere. In this research, a ventilation system is studied by means of CFD simulations and experiments, with the aims of reducing a nonsmoker's exposure to tobacco smoke in restaurants. In the previous paper, the CFD simulations were conducted with various conditions. The CFD results showed that a combined system of local ventilation and displacement ventilation can improve indoor air quality more than that realized using a mixing ventilation system. This paper presents the results of the experiments and CFD simulations with a moving body. Some difference is observed between the experimental and CFD results, but both results show that a combined system of local ventilation and displacement ventilation is expected to maintain good indoor air quality. The influence of the ventilation rate and the position of smoker on the ventilation effectiveness is also examined. In addition, moving-body CFD simulations are conducted to study the disturbance due to moving human bodies. The CFD results show that the concentration of particulate matter is maintained within the allowable level even when moving bodies exist.

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