矽膠塗佈厚度對扁平管吸附床性能之影響｜國立中央大學博碩士論文系統

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研究生：	林宗漢 Zong-han Lin
論文名稱：	矽膠塗佈厚度對扁平管吸附床性能之影響 The influence of performance of flat-tube adsorption bed by the thickness of silica gel coated layer
指導教授：	楊建裕 Chien-yuh Yang
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 機械工程學系 Department of Mechanical Engineering
畢業學年度：	99
語文別：	中文
論文頁數：	95
中文關鍵詞：	厚度、吸附式製冷、吸附床、矽膠-水
外文關鍵詞：	thickness, adsorption cooling, silica gel-water, adsorption bed
相關次數：	點閱：8 下載：0
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本實驗使用矽膠-水做為工作配對，以扁平管做為吸附式空調系統中之吸附床，希望改進現有吸附床缺點，以期達到高填充量與低熱阻之吸附床，並採用塗佈式設計，增加吸附床性能。另外針對不同矽膠塗佈厚度做研究，分析不同塗佈厚度對於吸附床性能之影響，找出最佳塗佈厚度。
實驗結果發現，相較於圓管式吸附床，扁平管式吸附床在使用相同的腔體容積下有較多的矽膠填充量與較好的吸附性能。而在塗佈厚度的分析，薄塗佈厚度之矽膠層有比較小的熱阻以及較佳的質傳性能，因此在較少的矽膠量下仍有較好的吸附性能與冷凍能力。

An investigation of adsorption bed using flat-tube in a adsorption cooling system with siliga gel as adsorbent and water as refrigerant is described. The new type adsorption bed is in order to increase the amount of adsorbent and decease the thermal resistance. Otherwise, the performance of the adsorption bed with difference thickness of silica gel coated layer on the flat-tube is discussed.
The results show that the performance of the flat-tube adsorption bed is better than the circular tube. The amount of water adsorbed of flat-tube adsorption is 2.2 times than the circular tube in 10 minutes at adsorption cycle. Otherwise, it is smaller thermal resistance and better performance of mass transfer by thin thickness of silica gel coated layer. It means that the 2.8 mm coated layer has better performance of adsorption and cooling power.

摘要 ........................................................................................................................ i
Abstract ................................................................................................................. ii
致謝 ...................................................................................................................... iii
目錄 ...................................................................................................................... iv
表目錄 .................................................................................................................. vi
圖目錄 ................................................................................................................. vii
符號說明 ............................................................................................................... x
第一章 前言 ......................................................................................................... 1
1 研究動機 ................................................................................................ 1
2 研究目的 ................................................................................................ 2
第二章 文獻回顧 ................................................................................................. 5
1 固體吸附式製冷 .................................................................................... 5
2 吸附床熱傳 ............................................................................................ 6
3 吸附床熱交換器型式 ............................................................................ 7
4 吸附劑填放型式 .................................................................................... 8
4.1 填充式吸附床 ............................................................................. 8
4.2 固化式吸附床 ............................................................................. 9
4.3 塗佈式吸附床 ........................................................................... 10
5 吸附劑厚度 .......................................................................................... 11
6 結論 ...................................................................................................... 12
第三章 實驗方法 ............................................................................................... 31
1 吸附床製作 .......................................................................................... 31
1.1 吸附床熱交換器設計與製作 ................................................... 31
1.2 吸附劑(矽膠)塗佈 .................................................................... 31
2 實驗系統 .............................................................................................. 32
3 實驗量測設備 ...................................................................................... 32
4 實驗步驟 .............................................................................................. 34
4.1 吸附性能測試 ........................................................................... 34
4.2 脫附性能測試 ........................................................................... 35
5 數據換算 .............................................................................................. 35
5.1 理想吸附循環圖 ....................................................................... 35
5.1 吸附/脫附速率 .......................................................................... 36
5.2 製冷率(Cooling Power) ............................................................ 36
5.3 加熱率 ....................................................................................... 37
第四章 實驗結果與討論 ................................................................................... 54
1 扁平管與圓管吸附床性能比較 .......................................................... 54
1.1 扁平管吸附床吸附性能 ........................................................... 54
1.2 扁平管吸附床脫附性能 ........................................................... 54
1.3 吸附床性能比較 ....................................................................... 55
2 矽膠塗佈厚度性能比較 ...................................................................... 57
2.1 塗佈厚度3.4 mm 吸附床性能 ................................................ 57
2.2 塗佈厚度2.8 mm 吸附床性能 ................................................ 58
2.2 塗佈厚度2 mm 吸附床性能 ................................................... 58
2.3 性能比較 ................................................................................... 59
第五章 結論 ....................................................................................................... 80
參考文獻 ............................................................................................................. 81
附錄、實驗誤差分析 ......................................................................................... 85

                                

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