博碩士論文 87323032 詳細資訊


姓名 岳志傑(Zhe-Jian Yua)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 扁平管平行流熱交換器之研製與性能分析
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關鍵字(中) ★ 扁平管平行流熱交換器
★ 百葉窗型氣孔鰭片
★ 扁平管平行流冷凝器
★ 圓管穿管式熱交換器
★ 扁平鋁擠型
關鍵字(英)
論文目次 目 錄
頁次
摘要--------------------------------------------------------------------------------------i
目錄--------------------------------------------------------------------------------------ii
表目錄----------------------------------------------------------------------------------- v
圖目錄-----------------------------------------------------------------------------------vi
符號說明--------------------------------------------------------------------------------xii
第一章 前言---------------------------------------------------------------------------1
1.1 研究動機--------------------------------------------------------------------------1
1.2 研究目的--------------------------------------------------------------------------3
第二章 文獻回顧---------------------------------------------------------------------10
2.1 鰭管式熱交換器種類分析-----------------------------------------------------10
2.1.1 圓管穿管式熱交換器--------------------------------------------------- 10
2.1.2 扁平管式熱交換器------------------------------------------------------ 10
2.2 熱交換器設計法概述-----------------------------------------------------------13
2.2.1 性能設計問題------------------------------------------------------------ 13
2.2.2 尺寸設計問題------------------------------------------------------------ 14
2.2.3 熱傳分析方法------------------------------------------------------------ 15
2.3 熱交換器設計分析探討--------------------------------------------------------16
2.4 百葉窗型鰭片熱傳分析--------------------------------------------------------20
2.5 管側熱傳分析--------------------------------------------------------------------25
2.5.1 單相熱傳----------------------------------------------------------------- 25
2.5.2 兩相冷凝熱傳------------------------------------------------------------ 26
第三章 熱交換器設計及測試系統------------------------------------------------40
3.1 熱交換器設計--------------------------------------------------------------------40
3.1.1 百葉窗型氣孔鰭片型式的選取--------------------------------------- 40
3.1.2 扁平鋁擠型管型式的選取--------------------------------------------- 41
3.1.3 扁平管平行流冷凝器PFC設計原理-------------------------------- 41
3.1.4 PFC設計原則---------------------------------------------------------- 42
3.1.5 PFC計算程序---------------------------------------------------------- 43
3.2 測試系統-------------------------------------------------------------------------- 49
3.2.1 開放式風洞-------------------------------------------------------------- 49
3.2.2 熱水循環系統----------------------------------------------------------- 49
3.2.3 資料蒐集系統-----------------------------------------------------------50
3.2.4 實驗量測設備------------------------------------------------------------ 50
3.2.5 測試件--------------------------------------------------------------------- 52
3.3 實驗方法--------------------------------------------------------------------------52
第四章 理論分析---------------------------------------------------------------------66
4.1 熱傳分析--------------------------------------------------------------------------66
4.2 壓降分析--------------------------------------------------------------------------72
第五章 結果分析與討論------------------------------------------------------------75
5.1 圓管穿管式與扁平管平行流熱交換器之性能比較-----------------------75
5.1.1 圓管穿管式熱交換器實驗結果---------------------------------------75
5.1.2 扁平管平行流熱交換器實驗結果------------------------------------76
5.1.3 穿管式與扁平管平行流熱交換器性能比較------------------------77
5.2 扁平管平行流熱交換器測試與程式模擬結果比較-----------------------77
5.2.1 測試條件-------------------------------------------------------------------77
5.2.2 最佳化程式精確度分析-------------------------------------------------78
5.2.3 質傳效應分析-------------------------------------------------------------78
5.2.4 管排數分佈與熱阻比性能分析----------------------------------------79
5.3 現有市售熱交換器模擬比較---------------------------------------------------79
5.3.1 運轉環境與模擬狀態設定----------------------------------------------79
5.3.2 模擬結果與討論----------------------------------------------------------80
5.3.3 在不同正向風速下之熱負載及鰭測壓損圖-------------------------81
第六章 結論---------------------------------------------------------------------------129
參考文獻--------------------------------------------------------------------------------132
附錄--------------------------------------------------------------------------------------137
表 目 錄
頁次
表2.1(a)Wang et al. (1996,1997,1998) 實驗條件28
表2.1(b)Wang et al. (1996,1997,1998)三種鰭片之尺寸規格28
表2.2 Goodremote et al. (1988) 所做熱交換器詳細尺寸29 11
表3.1實驗設備誤差表54
表3.2測試件幾何尺寸55
表5.1圓管穿管式熱交換器No 4與扁平管平行流熱交換器
No 9之性能評估 (FG-3)82
表5.2No 9實際測試條件、結果與最佳化程式運算結果比較83
表5.3管排數分佈與熱阻比(管內最小熱阻PASS之熱阻值/
管內最大熱阻PASS之熱阻值)之性能分析84
表5.4圓管穿管熱交換器單體基本參數85
表5.5分別對圓管穿管式冷凝器在相同熱負載下之模擬86
圖 目 錄
頁次
圖 1.1冷氣機全圖 4
圖 1.2 典型鰭管式熱交換器單體示意圖 5
圖1.3 蛇盤管冷凝器單體示意圖 5
圖1.4低速尾流區域6
圖1.5 扁平管平行流熱交換器單體示意圖7
圖1.6 圓管穿管式熱交換器與扁平管平行 流熱交換器側視圖8
圖1.7 扁平管平行流冷凝器流動方式簡圖9
圖2.1 三種鰭片之熱傳性能與壓降比較30
圖2.2 扁平管與圓管鰭片結構之比較31
圖2.3 Goodremote et al. [1988]的實驗結果比較32
圖2.4 Sugihara and Lukas (1990)的實驗結果比較33
圖2.5 鰭管式熱交換器試驗樣品迴路結構34
圖2.6泛用型盤管迴路指標子迴路-分支之定義35
圖2.7第 ic 子迴路、第 ib 分支管路結構36
圖2.8控制容積37
圖2.9PFC設計分段圖(褚耀宗[1999])37
圖 2.10歧管流與邊界層流
(Achaichia & Cowell[1988])38
圖 2.11Louver Fin 間流場結構
(Webb & Trauger[1991])39
圖 3.1百葉窗型鰭片與扁平鋁擠型管示意圖56
圖 3.2熱交換器廠商提供之扁平管及百葉窗型鰭片詳細尺寸圖57
圖 3.3PFC尺寸計算(Sizing Procedure) 流程圖58
圖 3.4PFC性能計算( Rating Procedure ) 流程圖59
圖 3.5開放式風洞示意圖60
圖 3.6熱水循環系統61
圖 3.7資料蒐集系統62
圖 3.8電阻式溫度計校正曲線圖63
圖 3.9熱電偶溫度計校正結果64
圖 3.10水流量計校正結果65
圖 4.1鰭片效率估算方式( Schmidt [1945] )73
圖 4.2入口(Kc)及出口(Ke)壓損因子關係圖74
圖 5.1圓管穿管式熱交換器性能曲線圖87
圖 5.2穿管式熱交換器No 4與No 5性能曲線與
Wang et al.(1998)之關係式比較88
圖 5.3鰭片間距為1.3mm之扁平管平行流熱交換器性能曲線與Chang et al.(1996,2000)關係式比較89
圖 5.4鰭片間距為1.7mm之扁平管平行流熱交換器性能曲線與Chang et al.(1996,2000)關係式比較90
圖 5.5圓管穿管式熱交換器No 4與扁平管平行流熱交換器No 9之鰭側熱傳性能比較91
圖 5.6圓管穿管式熱交換器No 4與扁平管平行流熱交換器No 9之鰭側壓降比較92
圖 5.7No 9在不同運轉風速下之熱負載量與鰭側壓損預測分析93
圖 5.8扁平管平行流冷凝器No 9打水與未打水之性能預測分析94
圖 5.9a利用扁平管平行流冷凝器取代圓管穿管式冷凝器(熱負載:2014kcal/hr)之模擬預測分析95
圖 5.9b利用扁平管平行流冷凝器取代圓管穿管式冷凝器(熱負載:3535kcal/hr)之模擬預測分析96
圖 5.9c利用扁平管平行流冷凝器取代圓管穿管式冷凝器(熱負載:4502kcal/hr)之模擬預測分析97
圖 5.9d利用扁平管平行流冷凝器取代圓管穿管式冷凝器(熱負載:5772kcal/hr)之模擬預測分析 98
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指導教授 楊建裕(Chien-Yuh Yang) 審核日期 2000-7-13
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