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| 研究生： |
朱律光 Chu, Lu-Kuang |
|---|---|
| 論文名稱： |
鰭片結構及二氧化鈦塗佈對水平圓管式吸收器效能的影響 Effects of Fin-Configuration and TiO2-Coating on the Performance of a Horizontal Tube Absorber |
| 指導教授： |
王逸君
Wang, Yi-Chun |
| 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： | 2010 |
| 畢業學年度： | 98 |
| 語文別： | 中文 |
| 論文頁數： | 77 |
| 中文關鍵詞： | 吸收式冷凍系統 、溴化鋰水溶液 、鰭片 、二氧化鈦 |
| 外文關鍵詞： | Absorption-type refrigeration system, lithium bromide, fin tube, titanium dioxide |
| 相關次數： | 點閱：83 下載：3 |
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在冷凍空調領域中，溴化鋰水溶液被廣泛的應用作為吸收式冷凍系統中的吸收劑，利用溴化鋰易吸收水汽的特性來達到吸濕降溫的目的。對整個吸收式冷凍系統而言，除了吸收劑之入口濃度、溫度，吸收劑的流量及蒸汽室壓力外，溴化鋰水溶液與水蒸汽的接觸面積為影響吸收效率的重要參數。本論文主要在改變系統的吸收器之結構及表面親水性，以達到增加液-汽接觸的總面積，進而增加該系統吸收效率。結構上在吸收器排管外圍增加傾斜鰭片，目的在增加溴化鋰水溶液與吸收器、水蒸汽的接觸面積。另外在吸收器的外表面上，則利用塗佈二氧化鈦(TiO2)薄膜的來增加其親水性，如此亦可有效增加吸收器表面溴化鋰水溶液薄膜的形成。本研究以實驗量測，比較有無鰭片結構及塗佈二氧化鈦前後之吸收器吸濕效率，作為未來改善吸收器性能之依據。
In the absorption-type refrigeration and air conditioning field, lithium bromide solution has been widely used as an absorbent. In addition to inlet absorbent concentration, temperature, flow rate and absorption pressure, the total contact area of the lithium bromide solution with water steam is an important parameter for the performance of the absorber. In this study, we design an array of tilted fins on a horizontal absorber to increase the absorption surface. Also on the external surface of the absorber, we apply a thin-film coating of titanium dioxide (TiO2) to increase its hydrophilicity. The aim of this study is to evaluate experimentally the effects of the tilted fins and TiO2 coating on the absorption performance of the absorber.
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校內：2012-08-26公開校外：2012-08-26公開