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  • 學位論文

計算流體力學應用於臭氧空間消毒之研究

Computational Fluid Dynamics Applied to Space Disinfection by Ozone

指導教授 : 於幼華

摘要


中文摘要 本研究利用以數值方法為基礎的計算流體力學軟體CFD (Computational Fluid Dynamics),模擬氣相臭氧反應槽內部之各種設計條件的狀況,並對於氣相臭氧反應槽內部提出設計建議;另外,模擬氣相臭氧殺菌系統應用於病房內部之流場狀況,並且評估將臭氧釋放於病房空間中殺菌之可行性,以及觀察殘餘臭氧濃度是否符合法規限定值。 由CFD軟體模擬結果顯示,氣相臭氧反應槽之內部設計,放置於兩側之擋板形狀以入字型最好,放置於氣道中央之擋板形狀以正方形擋板最好,其系統之混合效果與進出口之壓差綜合評估較佳。比較氣相臭氧反應槽內部擋板的設計位置,顯示擋板位置以放置於氣道中央較佳,氣體混合亂度比放置兩側高14%,系統進出口壓差減少77%。 考慮空間換氣率、空氣與臭氧接觸時間及臭氧尾氣處理技術,CFD軟體模擬顯示,氣相臭氧殺菌系統於病房內部,設計流量以300LPM為宜,位置以病床右側最佳,放置的高程不同對於換氣效果沒有明顯影響。另外,將氣相臭氧殺菌系統設置於病房內部,可用CFD軟體模擬空間中臭氧濃度之分布,以與美國國家空氣品質標準(NAAQS)之上限值120ppb作比較評估。 以CFD軟體模擬氣相臭氧釋放於負壓病房內之流場,藉以評估臭氧直接空間消毒殺菌之效能,本研究設定臭氧機出口濃度100ppm (流量300LPM),則分布於空間之臭氧濃度值範圍約為0.045~5ppm,根據相關文獻指出,對於大部份細菌與病毒可達到99%之消毒效率。 關鍵字:嚴重急性呼吸道症候群(SARS)、臭氧、空間消毒、計算流 體力學(CFD)、負壓病房

並列摘要


Abstract This research uses Computational Fluid Dynamics software based on numerical analysis to simulate the inner flow field of gas-ozone reactor in all kinds of designed conditions to come out with the best design of inner gas-ozone reactor. The results of CFD simulation show that to evaluate the mixing effect and the pressure drop of system, the best shape of spoiler on both sides of the gas-ozone reactor is 入 , and the best shape of spoiler in the center of the gas-ozone reactor is square. The spoilers in the center are better than the spoilers on both sides of the gas-ozone reactor. The turbulence intensity increases 17% and the pressure difference drops 77% in the center compare to those on the both sides. The CFD simulation shows that the best flow rate of gas-ozone disinfections system placed in the sickroom is 300 LPM, and the best position is the right side of sickbed and the different altitude has no effect on the air change rate. Besides, CFD software can simulate the distribution of gas-ozone concentration in the sickroom with gas-ozone disinfection system, and the results will be compared with limited value of NAAQS ( 120ppb). The results of evaluation the efficiency of space disinfection by using gas-ozone in the negative pressure isolation room of hospital showed that the range of ozone concentration in the negative pressure isolation room was 0.045~5ppm during the conditions was the outlet ozone concentration 100ppm and flow rate 300LPM. According to the studies, the efficiency of space disinfection could reach 99% for more bacteria and virus under this ozone concentration. Key words : Severe Acute Respiratory Syndrome(SARS)、Ozone、 Space disinfection、Computational Fluid Dynamics (CFD)、negative pressure isolation room

參考文獻


林信旭,以二氧化碳與甲權污染物探討有效通風控制之研究-以台灣辦公空間為例,國立成奶j學建築學系研究所碩士論文,2002。
任立宇,臭氧應用於空間及表面消毒殺菌之評估研究,國立台灣大學環境工程研究所碩士論文,2004。
A.D.Gosman(1999).Developments in CFD for industrial and environmental applications in wind engineering. Journal of Wind Engineering and Industrial Aerodynamics 81: 21-39
A.Mistriotis,G.P.A.Bot,P.Picuno and G. Scarascia-Mugnozza(1997). Analysis of the efficiency of greenhouse ventilation using computational fluid dynamics. Agricultural and Forest Meteorology 85: 217-228
A.M.Foster,R.Barrett,S.J.James and M.J.Swain(2002).Measurement and prediction of air movement through doorways in refrigerated rooms. International Journal of Refrigeration 25: 1102-1109

被引用紀錄


任立宇(2004)。臭氧應用於空間消毒殺菌之評估研究〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342%2fNTU.2004.01727

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