Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2325
DC FieldValueLanguage
dc.contributor.advisor沈君洋zh_TW
dc.contributor.advisorJung-Yang Sanen_US
dc.contributor.author詹清龍zh_TW
dc.contributor.authorJan, Chin-Lonen_US
dc.date2001zh_TW
dc.date.accessioned2014-06-05T11:43:01Z-
dc.date.available2014-06-05T11:43:01Z-
dc.identifier.urihttp://hdl.handle.net/11455/2325-
dc.description.abstract本文探討雙塔式吸附除濕系統中之填充床於再生後冷卻對系統性能之影響,研究中所考慮之吸附劑有矽膠與13X分子篩等二種吸附劑。主要考慮的系統操作因素包括有冷卻風量之大小及其冷卻之方向。而實驗過程中之操作半週期、再生溫度、系統入口處空氣溫度與濕度比、以及再生側與吸附側空氣流量之大小等均列為分析之變數。另外利用上述二種吸附劑不同之吸濕特性,此研究設計一組兩段組合式之填充床,藉由此種設計,可使系統於週期穩定操作之狀態下,出口空氣濕度達到-50℃以下露點溫度之低濕狀態,且在整個操作週期中得以持續其吸附性能。於理論分析上,填充床之吸附模式乃依據Pesaran所建立之SSR(solid-side resistance method)模式,並以數值方法對矽膠填充床進行電腦模擬分析,此模擬分析之結果並與實驗量測之數據相比較。zh_TW
dc.description.abstractThis work deals with the effect of a precooling mode on the performance of a packed-bed dehumidification system. The precooling mode is arranged at the end of the desorption mode. Two adsorbents, a regular density silica gel and a 13X-zeolites are considered. The considered variables in the operation include: the air flowrate of cooling stream, direction of cooling stream, cycle time, inlet air temperatures and humidity ratios, regeneration temperature and air flowrate in adsorption and desorption modes. Based on the adsorption characteristics of the silica gel and 13X-zeolites, the packed-bed is divided into two parts. One is filled with the silica gel particles and the other is filled with the 13X-zeolites particles. Under this arrangement, the air at the exit of the system can reach a humidity level below -50℃ dewpoint temperature and this low humidity level would last over the entire operating cycle. The heat and mass transfer of the adsorption process is analyzed by using a modified solid-side resistance method, which was originally proposed by Pesaran et al.. The computer simulation results are compared with the experimental data.en_US
dc.description.tableofcontents中文摘要..........................................i 英文摘要..........................................ii 致謝..............................................iii 目錄..............................................iv 表目錄............................................vi 圖目錄............................................vii 符號說明..........................................x 第一章 簡介.......................................1 1.1前言.................................. 1 1.2相關研究..............................4 1.3實驗目的..............................6 第二章 理論模式...................................7 2.1 矽膠顆粒之熱質傳分析.................7 2.2 矽膠填充床之熱質分析模式.............11 2.3 等溫吸附線與吸附熱之計算.............16 2-4 輔助資料.............................18 第三章 除濕系統性能之比較........................20 3.1 矽膠吸附劑之吸附性能.................20 3.2 吸附劑除濕性能之比較....................21 3.3 除濕系統之設計比較......................22 第四章 實驗量測系統..............................25 4.1系統運作原理..........................25 4.2系統設備..............................25 4.3實驗設定..............................29 4.4實驗步驟..............................30 第五章 實驗量測與模擬分析........................32 5.1 13X分子篩填充床之性能量測............32 5.1.1 無再生後冷卻之系統性能量測.........32 5.1.2 冷卻流與脫附側流體同向之系統性能量測 ...................................32 5.1.3 冷卻流與吸附側流體同向之系統性能量測 ...................................34 5.2 矽膠填充床之性能量測.................35 5.2.1 無再生後冷卻之系統性能量測.........35 5.2.2 冷卻流與脫附側流體同向之系統性能量測 ...................................36 5.2.3 冷卻流與吸附側流體同向之系統性能量測 .........................................37 5.3 具冷卻流之兩段組合式填充床之性能量測..38 5.4 矽膠填充床之性能量測與模擬分析之比較..41 第六章 結論與建議.................................43 參考文獻...........................................46 表 目 錄 表1 13X分子篩之等溫吸附線..........................50 表2 系統於單一循環週期下之作動表..............51 表3 系統於單一循環週期下閥門之作動表..........52 圖 目 錄 圖2.1.1.吸附劑顆粒之擴散圖.........................53 圖2.2.1填充床氣體側中物理現象之假想圖.............54 圖2.3.1矽膠之等溫吸附線...........................55 圖2.3.213X分子篩之等溫吸附線......................56 圖4.2.1雙塔式吸附系統之配置圖.....................57 圖4.2.2具預冷過程之雙塔式吸附系統之配置圖.........58 圖5.1.113X分子篩填充床之性能測試(無再生後冷卻)....59 圖5.1.2冷卻過程時填充床入出口處空氣之溫度 (13X分子篩填充床)..........................60 圖5.1.3不同冷卻風量對13X分子篩填充床系統除濕性能 之影響(第一組測試)...............................61 圖5.1.4不同冷卻風量對13X分子篩填充床系統除濕性能 之影響(第二組測試).........................62 圖5.1.5不同冷卻風量對13X分子篩填充床系統除濕性能 之影響(第三組測試).........................63 圖5.1.6不同冷卻風量之下13X分子篩填充床系統吸附側 出口處空氣之溫度變化(第三組測試)...........64 圖5.1.7不同預冷風量時系統除濕率之分佈 (第三組測試)...............................65 圖5.1.8不同冷卻風量下13X分子篩填充床系統吸附側出 口處之平均露點溫度.........................66 圖5.1.913X分子篩填充床於低濕操作下受冷卻方向之影響 ...........................................67 圖5.1.10 13X分子篩填充床於低濕操作下之吸附性能.....68 圖5.2.1矽膠填充床之性能測試(無再生後冷卻).......69 圖5.2.2矽膠填充床系統於不同吸附週期時間下之性能比 較.........................................70 圖5.2.3矽膠填充床系統於不同吸附週期時間下之平均出 口露點溫度.................................71 圖5.2.4冷卻過程時填充床入出口處空氣之溫度 (矽膠填充床)..............................72 圖5.2.5不同冷卻風量對矽膠填充床系統除濕性能之影響 (第一組測試)..............................73 圖5.2.6不同冷卻風量對矽膠填充床系統除濕性能之影響 (第二組測試)..............................74 圖5.2.7不同冷卻風量下矽膠系統吸附側出口處之平均露點 溫度.......................................75 圖5.2.8矽膠填充床於低濕操作下受冷卻方向之影響.....76 圖5.2.9矽膠填充床於低濕操作下之吸附性能...........77 圖5.3.1兩段組合式填充床之性能測試(第一組測試)...78 圖5.3.2兩段組合式填充床之性能測試(第二組測試)...79 圖5.3.3兩段組合式填充床之性能測試(第三組測試)...80 圖5.3.4兩段組合式填充床吸附側出口空氣之溫度變化 (第一組測試)...............................81 圖5.3.5兩段組合式填充床吸附側出口空氣之溫度變化 (第三組測試)...............................82 圖5.3.6冷卻過程時填充床入出口處空氣之溫度 (兩段組合式填充床).........................83 圖5.3.7入口處空氣濕度比對吸附系統性能之影響.......84 圖5.3.8吸附風量對吸附系統性能之影響...............85 圖5.3.9入口處空氣溫度對吸附系統性能之影響.........86 圖5.3.10再生溫度對吸附系統性能之影響...............87 圖5.4.1 預冷時矽膠填充床內部吸附劑之溫度分佈.......88 圖5.4.2矽膠填充床系統實驗與模擬分析之性能比較 (冷卻與脫附同方向).........................89 圖5.4.3矽膠填充床系統實驗與模擬分析之性能比較 (冷卻與吸附同方向).........................90 圖5.4.4矽膠填充床系統實驗與模擬分析之性能比較 (入口空氣為低濕度比).......................91 圖5.4.5 13X分子篩填充床系統實驗與模擬分析之性能比較 (冷卻與脫附同方向)......................... 92 圖5.4.6 13X分子篩填充床系統實驗與模擬分析之性能比較 (冷卻與吸附同方向).........................93zh_TW
dc.language.isoen_USzh_TW
dc.publisher機械工程學系zh_TW
dc.subjectPacked-Beden_US
dc.subject填充床zh_TW
dc.subjectSilica Gelen_US
dc.subject13X-Zeolitesen_US
dc.subjectAdsorptionen_US
dc.subjectDesorptionen_US
dc.subjectPrecoolingen_US
dc.subject矽膠zh_TW
dc.subject13X分子篩zh_TW
dc.subject吸附過程zh_TW
dc.subject脫附過程zh_TW
dc.subject冷卻zh_TW
dc.title再生後填充床冷卻對雙塔式吸附除濕系統性能之影響zh_TW
dc.titleEffect of a Precooling Mode on the Performance of a Packed-Bed Dehumidification Systemen_US
dc.typeThesis and Dissertationzh_TW
item.languageiso639-1en_US-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.grantfulltextnone-
item.fulltextno fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
Appears in Collections:機械工程學系所
Show simple item record
 
TAIR Related Article

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.