室內加熱品含揮發性有機物質之通風稀釋研究-以甲醛為例

Study of Ventilated Dilution for Indoor Air Pollutants from Heating Objects with Volatile Organic Compounds(VOC)- Formaldehyde as an Example

黃亮璇(Liang-Hsuan Huang)

指導教授 ： 李孟杰

國立臺中科技大學/設計學院/室內設計系碩士班/碩士(2014年)

https://doi.org/10.6826/NUTC.2014.00074

摘要

室內空氣品質的化學性汙染源的相關研究，過去常以建材為主要探討對象，然而卻忽略室內加熱飲食致使污染源產生之可能性。而某些藥膳食品在蒸煮過程中，導致加熱後醛類氣體釋出，造成室內空氣受化學性汙染。為此，本研究藉由開口尺寸設計、通風量與通風路徑探討，利用通風換氣手法排除加熱品含醛類氣體逸散造成之室內汙染之問題，並藉由電腦動態模擬，比較不同通風型式與排除效果，以期達到良好室內空氣品質。為掌握輸入計算流體力學(CFD)模擬參數，本研究採用環境控制艙實驗，在可控制的狀況下，量測溫度升高時對甲醛逸散率。經實驗得出不同甲醛溶液濃度逸散率，將之帶入計算流體力學軟體(CFD)中。本研究以室內餐廳內10人圓桌座位為對象(3 m*3 m*3 m)，監測點以十字劃分四區域，並設定模擬機械通風時，不同的通風速率0.1 m/s、0.5 m/s、1.0 m/s、通風路徑與四種開窗型式-上開窗、中央開窗、下開窗、上下開窗，以確認排除室內甲醛汙染氣體最佳化效益，評估最佳稀釋的通風量與流速。為確認驗證模擬結果，本研究藉由案例上下開窗型式，甲醛溶液濃度2 ppm進行足尺實驗驗證，比對實驗結果與CFD模擬分析結果，驗證CFD模擬結果之再現性。最後提出最佳開窗型式、通風速率、換氣次數、換氣率以及開口尺寸大小，以提供日後對此問題之設計參照。

關鍵字

甲醛逸散 ； 通風換氣 ； 計算流體力學(CFD) ； 足尺實驗

並列摘要

Building materials were assumed as the main source of formaldehyde emission in the indoor environment. But cooking some Chinese medicinal cuisines also emits formaldehyde via their additives, especially after boiling.Research proposes an appropriate ventilation rate to dilute the high concentration formaldehyde emission while cooking. Study about that formaldehyde pollution to dilution from heating food by window opening to ventilation rate .Accoding to dynamic computer simulation control different ventilation way to improve metabolize by air pollution.Computational Fluid Dynamics (CFD) simulation parameters to control the input, this study cabin environmental control experiments under controlled conditions, the impact of formaldehyde escape rate monitor temperature. The experimental results of different concentrations of formaldehyde, will bring the computational fluid dynamics software (CFD) in.This study interior space to the restaurant seats 10 people roundtable object (3m * 3m * 3m), divided four monitoring points to cross the area, and set the simulation of mechanical ventilation, ventilation rate needed to 0.1 m s, 0.5 m/s, 1.0 m/s, and four kinds of window ventilation path pattern –upper the windows, the central window, under the window, down the window, double windows ,very metabolic indoor formaldehyde pollution gases optimize efficiency, in order to assess the most able ventilation rate and velocity of its dilution.Window simulated results by case type, the concentration of formaldehyde solution 2ppm as a full-scale experimental validation; then CFD simulation results were compared with experimental results, data validation, and computer simulation results after the match. CFD simulation results confirm this way. Propose the best type of windows open, ventilation rate, Air Change Per Hour, e, and opening size, enough to serve as reference for the design of future face this problem.

並列關鍵字

Formaldehyde Emission ； Ventilation Rate of Dilution ； Ventilation Velocity ； Ventilation Route ； Computational Fluid Dynamics (CFD) ； full-scale experiment

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