本文利用數值分析以及數位質點影像測速系統(Digital Particle Image Velocimetry, 簡稱DPIV)針對等比例縮小之焚化爐蒸汽冷凝器模型進行流場特性之比對，並利用數值分析的方式來模擬原尺寸焚化爐蒸汽冷凝器之速度場以及溫度場的分佈，同時針對不同帷幕高度及開孔面積，模擬在不同條件下之速度場及溫度場之差異，並對帷幕內部之流場特性加以分析。

　實驗部份是製作等比例縮小之蒸汽冷凝器，利用數位質點影像測速系統擷取中央截面之二維速度分佈，帷幕部份分為無開孔及開孔兩個，其結果顯示在帷幕無開孔時，氣流流出帷幕後會向外擴散，而帷幕開孔兩個時，氣流確實由開孔處流出，並受到上方氣流之牽引而隨之往上方流動，再以相同條件建立物理模型進行數值分析，將數值結果與實驗結果進行比對，結果顯示數值分析以及數位質點影像測速系統之結果相近，具有參考價值。

　在理論分析中，使用那維-史都克(Navier-Stokes equation)作為流場的統御方程式配合能量守恆方程求解焚化爐蒸汽冷凝器之速度及溫度之分佈。數值方法中以有限容積法為離散方法，並使用SIMPLEC法求解流場之分佈。本文之結果顯示，帷幕高度及開孔大小對焚化爐蒸汽冷凝器之散熱效果有極大的影響，帷幕內部之溫度分佈隨帷幕高度及開孔面積之增加而降低，在不同的使用環境下，帷幕高度之選擇及開孔面積的大小為增加化爐蒸汽冷凝器散熱效率的重要因素。

　Numerical method was used to predict velocity, temperature distribution in the incinerator air-cooled condenser, and the flow characteristics in the glass wall were also discussed in this study. In the 2-D numerical analytical method with original size model, try to change the height of the glass wall and the area of hole. In the 3-D numerical analytical methods with reduced size model, try to change the area of hole. The DPIV (Digital Particle Image Velocimetry) was also carried out in a reduced size model to compare the flow field s with the numerical results.

　The experiment was used the DPIV with reduced size model to pick up a 2-D velocity field. we used two kinds of wall, which one has no hole and the other has two holes. The results indicated that the airflow move off the glass wall, it will spread into the atmosphere. When the glass wall has two holes, the part of airflow will pass through the holes. Compare with the 3-D numerical analytical and the experiment, the results were similar.

　The Navier-Stokes equations with the energy equations were solved in this study. The SIMPLEC algorithm with finite volume based scheme was used in this numerical analysis. The results indicated that the height of the glass wall and the area of hole will influence temperature distribution in the glass wall, heighten the height of the glass wall and magnify the area of hole can reduce temperature in the glass wall of the incinerator air-cooled condenser.

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