| 研究生: |
蕭宜峰 Shiau, I-Fong |
|---|---|
| 論文名稱: |
利用油盤火焰驗證10MW大尺度燃燒分析裝置 Performance Evaluations on the 10MW Full-Scale Fire Test Facility by Using Oil-Pool Fires |
| 指導教授: |
林大惠
none |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 論文出版年: | 2004 |
| 畢業學年度: | 92 |
| 語文別: | 中文 |
| 論文頁數: | 137 |
| 中文關鍵詞: | 油盤火焰 、熱釋放率 、氧氣消耗法 |
| 外文關鍵詞: | heat release rate, pool fire, oxygen consumption |
| 相關次數: | 點閱:54 下載:1 |
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本文主要針對10MW大尺度燃燒分析裝置,利用標準油盤火焰來了解其操作特性並進行熱釋放率之校正。首先,經由冷流場實驗瞭解流場之均勻度,接著分別針對不同油盤個數、排列方式及不同抽氣流率進行油盤燃燒校正實驗。
本文利用四種方法來計算熱釋放率,分別為 (1)氧氣消耗法 (2)CO及CO2生成法 (3)熱對流升溫法 (4)質量損失率計算法,前兩者為利用氣體濃度分析來作計算,熱對流升溫則是利用煙氣之顯焓變化來計算。油盤汽油質量損失率計算之熱釋放率,則用以印證前三種方法計算之熱釋放率誤差。其中氧氣消耗法經驗證為最準確的計算方法。由校正實驗可知,在1MW到4MW之範圍間,氧氣消耗法的誤差值在10%以內。
文中藉由火焰型態、燃燒產物分析、流場變化及熱釋放率計算,探討關於燃燒火焰高度、集煙罩與油盤間距、煙氣收集情形、抽氣流量高低、氣體濃度修正及油盤擺設位置等因素間之相互影響,並歸納出10MW大尺度燃燒分析裝置操作上必須考慮之問題與解決方式。
With regard to a 10MW full-scale fire test facility, a series of calibration tests were carried out by means of gasoline pool fires. Various pool fire arrangements under different exhaust rates were conducted.
Heat release rate was computed with the following four methods. They are (1)oxygen consumption, (2)carbon dioxide generation, (3)gas temperature rise, and (4)mass reduction rate. The mass reduction rate of gasoline in the pool was measured with load cells; this method provided the basis of comparison for the first three methods. It was found in this study that the oxygen consumption method is more accurate than carbon dioxide generation method and is within 10% error in the range of 1~4MW heat release rate.
In the process of observation and analysis, the inter-relation among the following factors were recognized. These factors included flame appearance, fire products composition, exhaust rates, heat release rate, funnel-flame distance, and fuel pool arrangements. With this knowledge, some problems associated with the operation of the 10MW full-scale fire test facility were discussed and solutions suggested.
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