本論文提出一個創新的新裝置，以中空纖維模組作為具有混合氣液質傳與熱交換功能之裝置，並探討應用於氨水吸收式熱泵之吸收器的性能。嚴謹之熱質傳模式用以模擬此裝置之性能與熱質傳特性，並與另一文獻報導之具鰭設計之板式熱交換器式吸收器進行比較。中空纖維模組型式較之板式熱交換器型式具有十倍以上之單位體積界面面積，且多項熱質傳係數均較高。熱質傳阻力分析結果顯示只有吸收液相質傳係數較為顯著，但影響程度不高。對整體冷凍系統之性能而言，採用中空纖維模組型式吸收器可使性能係數提升14.8％。

An innovative device is proposed which uses a hollow fiber membrane module as both a gas-liquid contactor and a heat exchanger. The performance of the device as an absorber in the ammonia-water absorption heat pump system, HFMAE (hollow fiber membrane absorber and exchanger), is investigated. A rigorous mathematical model for HFMAE considering the heat and mass transfers of the ammonia-water absorber is used to simulate the performances and heat and mass transfer characteristics. Performances of HFMAE and a falling film type absorber using a plate heat exchanger with an offset strip fin (PHEFFA) are compared by simulation for employed as the solution-cooled absorber and the water-cooled absorber in the heat pump cycle. The unit volume interfacial area of HFMAE is more than ten times higher than PHEFFA and the heat and mass transfer coefficients are higher too. The analysis indicated that the major resistance is in liquid phase for both heat and mass transfers. For a typical ammonia-water absorption chiller, using HFMAE as the absorbers can result in an improvement in COP (coefficient of performance) of 14.8%.

目錄

中文摘要 ………………………………………………………………...i
英文摘要 .…………………………………………………………….....ii
誌謝 …………………………………………………………………….iii
目錄 …………………………………………………………………….iv
圖目錄 ………………………………………………………………….vi
表目錄 ………………………………………………………………...viii
第一章 前言 …..………………..………………………………………1
第二章 文獻回顧 ………………………………………………………6
第三章 模式建立 ………………………………………………………8
    3.1 系統配置 ……………………………………………………...8
    3.2 單元分析模式 ………………………………………………...9
    3.3 熱力性質繼計算模式………………………………………...22
    3.4 輸送性質與熱質傳係數……………………………………...23
    3.5 裝置尺寸參數………………………………………………...27
    3.6 數值方法及程式架構………………………………………...30
第四章 吸收器性能模擬分析…………………………………………32
    4.1 溶液冷卻吸收器……………………………………………...35
    4.2 水冷卻吸收器………………………………………………...44
第五章 吸收器熱質傳阻力分析..……………………………………..54
   5.1 溶液冷卻吸收器……………………………………………….54
   5.2 水冷卻吸收器………………………………………………….57
第六章 整体系統性能分析….………………………………………...59
第七章 結論 …………………………………………………………..66
符號說明 ………………………………………………………………69
參考文獻 ………………………………………………………………73

圖目錄

圖1-1 吸收式熱泵系統示意圖…………………………………………2
圖3-1 氨水吸收式冰水機………………………………………………8
圖3-2 中空纖維模組配置圖…………………………………………..12
圖3-3 同向流中空纖維薄膜模組第n段之進出物流與熱質傳通量示 
      意圖……………………………………………………………..13
圖3-4 偏置條狀鰭片板式熱交換器形式之落膜吸收器裝置………..16
圖3-5 同向流偏置條狀鰭片板式熱交換器形式之落膜吸收器裝置系 
      統中第n段之進出物流與熱質傳通量示意圖………………...17
圖3-6 殼側具隔根(baffle)之中空纖維模組…………………………..25
圖3-7 程式架構圖-吸收器…………………………………………….30
圖3-8 程式架構圖-氨水吸收式冷凍系統…………………………….31
圖4-1 溶液冷卻吸收器中各物流之局部溫度分佈…………………..36
圖4-2 溶液冷卻吸收器中物流局部組成分佈………………………..38
圖4-3 溶液冷卻吸收器中物流局部熱傳通量分佈…………………..40
圖4-4 溶液冷卻吸收器中物流局部質傳通量分佈…………………..41
圖4-5 在溶液冷卻吸收器中物流局部熱傳係數分佈(同向流)………43
圖4-6 溶液冷卻吸收器中物流局部質傳係數分佈(同向流)…………43
圖4-7 在溶液冷卻吸收器中氨之累積吸收量………………………..44
圖4-8水冷卻吸收器中各物流局部溫度分佈…………………………45
圖4-9水冷卻吸收器中物流局組成分佈………………………………47
圖4-10水冷卻吸收器中物流局部熱傳通量分佈……………………..49
圖4-11水冷卻吸收器中物流局部質傳通量分佈……………………..50
圖4-12水冷卻吸收器中物流局部熱傳係數分佈……………………..52
圖4-13水冷卻吸收器中物流局部質傳係數分佈……………………..52
圖4-14 在溶液冷卻吸收器中氨之累積吸收量………………………53
圖5-1 溶液冷卻吸收器各相熱質傳係數對吸收量的影響…………..55
圖5-2 乙二醇水溶液冷卻吸收器各相熱質傳係數對吸收器大小的影
      響………………………………………………………………..56
圖5-3 水冷卻吸收器各相熱質傳係數對吸收量的影響……………..57
圖6-1氨水吸收式冰水機系統配置…………………………………....60

表目錄

表3-1 中空纖維薄膜模組之參數-溶液冷卻………………………….28
表3-2 中空纖維薄膜模組之參數-水冷……………………………….28
表3-3 偏置條狀鰭片板式熱交換器之參數-溶液冷卻……………….29
表3-4 偏置條狀鰭片板式熱交換器之參數-水冷卻………………….29
表4-1 進料物流狀態-溶液冷卻……………………………………….33
表4-2 進料物流狀態-水冷卻(PHEFFA)………………………………33
表4-3 進料物流狀態-水冷卻(HFMAE)………………………………34
表4-4 裝置體積與界面面積-溶液冷卻……………………………….34
表4-5 裝置體積與界面面積-水冷卻………………………………….34
表6-1 中空纖維薄膜模組之參數-溶液冷卻………………………….61
表6-2 中空纖維薄膜模組之參數-水冷卻…………………………….61
表6-3 新配置系統之物流狀態表……………………………………..62
表6-4 原配置系統之物流狀態表……………………………………..63
表6-5 新配置與原配置性能參數……………………………………..64
表6-6 新配置與原配置之可用能損失(J/S)…………………………...65

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