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Student Number 87323032
Author Zhe-Jian Yua(岳志傑)
Author's Email Address No Public.
Statistics This thesis had been viewed 3066 times. Download 2856 times.
Department Mechanical Engineering
Year 1999
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title 扁平管平行流熱交換器之研製與性能分析
Date of Defense 2000-07-13
Page Count 118
Keyword
  • 圓管穿管式熱交換器
  • 扁平管平行流冷凝器
  • 扁平管平行流熱交換器
  • 扁平鋁擠型
  • 百葉窗型氣孔鰭片
  • Abstract none
    Table of Content 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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  • Chien-Yuh Yang(楊建裕)
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    Date of Submission 2000-07-13

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