吸菸室通風設置的CFD模擬

CFD simulation of smoking room ventilation setting

10.29911/JEHVACE_NEW.202307_(140).0003

張烔堡(Tong-Bou Chang)；楊沁翰(Chin-Han Yang)

吸菸室 ； CFD ； 通風設置 ； 粒子 ； smoking room ； CFD ； ventilation settings ； particles

冷凍空調&能源科技

140期（2023 / 07 / 10）

44 - 52

繁體中文;英文

抽菸對大部分的人來說是不好且不討喜的，在公共場所中，煙味與有害粒子常常會造成非吸菸者的不適與健康危害，即使是經政府認證合格的吸菸場所，在設計不良的狀況下也無法有效地阻擋二手菸害，在室內的吸菸室若是能快速且有效的排除菸粒子，就可以減少菸粒子飄到非吸菸室的可能性。本文利用ANSYSFLUENT進行吸菸室在三種不同通風設置下的CFD模擬，在相同的入口流量下，設置五個發菸器產生120顆菸粒子，分析其流場並透過後處理將數據匯入Excel計算顆粒平均的脫逃時間，再依結果探討流場與菸粒子滯留時間的關係，並從中分析出排煙效果較佳的通風設置。透過最後的分析結果可知不論在原流量或兩倍流量的狀況下，活塞式的通風設置都有較短的菸粒子滯留時間，另外在流量加倍的狀況下，滯留時間大幅減短的為置換式通風，而變化幅度最小的為活塞式通風，以節能觀點來說，吸菸室可以採用低流量的活塞式通風，才可以達到最好的排煙與節能效果。

Smoking is bad and unpleasant for most people. In public, Smoke smell and harmful particles often cause discomfort and health hazards for non-smokers. Even a government-certified smoking place, it cannot effectively block secondhand smoke damage in the case of poor design. If the indoor smoking room can quickly and effectively remove smoke particles, it could reduce the possibility of smoke particles drifting into non-smoking rooms. This paper use ANSYS FLUENT to perform CFD simulation of smoking room under three different ventilation settings. Under the same inlet flow, we set five smoke generators to generate 120 smoke particles. We analyze the flow field and import the data into Excel through post-processing to calculate the average escape time of the particles. According to the results, we will discuss the relationship between the flow field and the residence time of smoke particles, and analyze the ventilation settings with better smoke exhaust effect. Through the final analysis results, it can be seen that the piston ventilation setting has a shorter retention time of smoke particles regardless of the original flow rate or double flow rate. In addition, when the flow rate is doubled, the residence time is greatly reduced for displacement ventilation, and the smallest change is for piston ventilation. From the point of view of energy saving, low-flow piston ventilation can be used in the smoking room to achieve the best effect of smoke exhaust and energy saving.

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