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  • 學位論文

利用紫外光清淨技術去除室內空氣污染物之效能評估

The Study of Ultraviolet Radiation Technique for Removal of the Indoor Air Pollution

指導教授 : 曾昭衡

摘要


本研究目的利用空氣品質測試箱及實場評估UV-C(253.7 nm)去除空氣污染物之效能,同時驗證氣流模擬分析模式CONTAM之可行性,空氣品質測試箱UV-C於不同相對濕度與濃度條件下對HCHO、TVOC之去除效能及自衰測試, UV-C去除污染物時是否產生二次污染物(O3、NO2)。實場選擇地下停車場、廚餘回收區、中西醫聯合診所及醫學美容診所四案例,規劃各實場以不同UV-C照射形式(包含:直接式照射、頂部式照射、上層空間照射)、照射時間、距光源距離(水平距離、垂直高度)等相關條件進行探討,同時量測UV-C應用於物體表面Bacteria、Fungi去除效果,此外以空氣品質測試箱中UV-C之HCHO、TVOC去除量模擬實場UV-C去除空氣污染物,驗證氣流模擬分析模式CONTAM之可行性。 測試箱中UV-C去除空氣污染物結果,HCHO、TVOC去除率並不隨著污染物起始濃度改變而有明顯變動,其去除率與相對濕度有關,固定濃度低相對濕度(RH = 40 %)條件下HCHO、TVOC去除效率最佳(32.6 %、13.6 %)。實場中UV-C去除空氣污染物方面,長期UV-C照射去除效率較短期照射去除效率佳,長期UV-C照射HCHO、TVOC平均去除率範圍為23.1 - 76.2 %間,Bacteria、Fungi部份除診所B無去除效果外,平均去除率範圍介於38.5 - 92.9 %間;距離因素方面,垂直高度距離對UV-C照射去除污染物後濃度影響不顯著,偏差值大致位於±16 %區間;在距燈源水平距離上,地下停車場結果,當燈源與檢測點距離越近則濃度越低去除效果越佳。廚餘回收區與診所(A)因場址通風影響及多重小隔間下空氣易均勻混合,導致濃度與距離間關係不顯著。UV-C測試過程中,無論測試箱或實場案例中二次污染物(O3、NO2)生成累積濃度,皆低於環保署建議值。 UV-C對於物體表面Bacteria、Fungi去除效果,距離UV-C燈源2公尺內(5.5 μw/cm2),照射1週後物體表面生物性污染物皆能完全去除。綜合空氣品質測試箱與實場檢測結果,進行氣流模擬分析模式CONTAM分析,結果顯示在實場模組較為單一、無多重隔間情況下具有較高成功率,在多重隔間下因軟體質能運算能力問題,可能導致運算失敗,在4實場完成模擬後,方法一(去除與自衰),HCHO之MAPE平均值為96.5 %,TVOC之MAPE平均值為89.9 %,方法二(空調),HCHO之MAPE平均值為88.2 %,TVOC之MAPE平均值為6.0 %,整體而言,除方法二之TVOC外,顯示利用測試箱參數模擬實場去除率其預測性不佳。

並列摘要


The research tested the use of air quality and made the actual-field assessment on UV-C air pollutant removal efficiency, and to verify the feasibility of simulation model CONTAM airflow. Air quality test cases UV-C had the removal efficiency and self-failure tests at different relative humidity and concentration under HCHO and TVOC, and whether UV-C removes pollutants from secondary pollutants (O3, NO2). Four sites, underground parking, kitchen waste recycling area in the Western United clinics and medical cosmetic clinics, were chosen for field studying in a different form of UV-C radiation exposure (including: mobile radiation, the top-type light, the upper space radiation), exposure time, and distance away from the light source (horizontal distance, vertical height) of other related conditions Bacteria and Fungi removal efficiency with UV-C application on the surface can be therefore measured. In addition, to verify the feasibility of model CONTAM of air flow simulation with HCHO of UV-C test case and TVOC simulated actual-field removal air pollutants of UV-C. Tests in the box the UV-C elimination air pollutant result, HCHO, TVOC elimination rate does not have the obvious change along with the pollutant outset density change, and its elimination rate is relative to its humidity; besides, fixed density low relative humidity (RH =40 %) under condition HCHO, TVOC elimination efficiency best (32.6 %, 13.6 %). For the UV-C elimination air pollutant in the actual fields, the long-term UV-C illumination elimination has the best efficiency comparing to the short-term illumination elimination, and the long-term UV-C shines HCHO, the TVOC average elimination rate scope is from 23.1 to 76.2 %, Besides non-elimination effect in the clinic B, the average elimination rate scope of bacteria, the fungi is situated between 38.5 to 92.9 %. From the factor aspect, the vertical height to the density influence of UV-C illumination elimination pollutant is not remarkable, and the deviation amount is located at ±16 % sectors approximately. In is apart from the lamp source contour interval, underground parking garage result, the elimination effect is better when the distance between the light source and check point is closer. Because the influence of site ventilates and the air mixing problem in the area with multiple small compartments between kitchen waste recycling area and the clinic (A), the relation between the density and distance is not significant. In UV-C test procedure, the accumulation density produced by the second pollutants (O3, NO2) in both test boxes and actual fields is lower than the environmental protection bureau suggestion value. Regarding the Bacteria, the Fungi elimination effect of UV-C, within 2 meters away from the UV-C light source (5.5 μw/cm2), all biological pollutants on the object surface can be removed completely after shines for a week. Under the air current simulation CONTAM analysis, the test result on comprehensive air attribute test box and the actual field test showed test done in actual fields had simpler result which has higher chance to succeed comparing with done in multiple compartmented areas because of possible software failure under the condition of calculating in multiple compartmented areas. After 4 actual fields completes the simulation, method 1 (remove and self-failure tests), the MAPE value of HCHO is 96.5 %, the MAPE value of TVOC is 89.9 %, method 2 (air conditioning), the MAPE value of HCHO is 88.2%, the MAPE value of TVOC is 6.0 %. In conclusion, the efficiency of simulating elimination rate using the parameter from test box had poor result.

並列關鍵字

Ultraviolet radiation HCHO TVOC Bioaerosol Indoor Air Quality

參考文獻


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