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姓名 林建宏( Lin, Chien-Hung)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 變頻空調機在不同環境下之控制策略性能測試與分析
(The controlling strategy performance testing and analysis of variable speed air condition in different condition)
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摘要(中) 本論文為得出室內溫度與壓縮機轉速之關係,並得出空調機之最佳控制策略。由蒸發器及室內環境的能量平衡,和壓縮機轉速與冷媒流量關係,得知室內溫度與壓縮機轉速之關係為二階的轉移函數。
現行空調機的控制策略分為三部分,第一為壓縮機的啟動策略,其次為在不同室外溫度下,溫差所對應的初始轉速命令,第三為壓縮機轉速隨室內溫度之變化。此外,在室內溫低於設定溫約2 oC時,壓縮機停機,等到室內溫與設定溫約相同時,壓縮機再次啟動。為得出小型變頻空調機之最佳降溫曲線,本論文利用不同工作條件下進行運轉測試,得出室內溫度與壓縮機轉速之轉移函數之係數,改寫成壓縮機轉速為室內溫度的函數,測試運轉於現行空調機。
摘要(英) In this thesis, the relationship between indoor temperature and the compressor speed is obtained by the conservation principles of energy in the evaporator, the mass flow of refrigerant, and the indoor dynamics. An second-order model structure with indoor temperature and compressor speed is setup.
There are three stage of the original controller in the air condition. The compressor speed of the first stage is opening. The compressor speed of the second stage is decided on the difference of setting temperature and indoor temperature. The compressor speed of the third stage is changed with the change of the indoor temperature.
In order to achieve greater improvement over conventional schemes, to control a vapor compression cycle over a wide range compressor speed and others characteristics. Then find out the factors of second-order model structure with indoor temperature and compressor speed. The compressor speed is adapted to the function of indoor temperature, and then tested with the air-conditioner.
關鍵字(中) ★ 變頻空調機
★ 控制策略
★ 室內溫度與壓縮機轉速之關係式
關鍵字(英) ★ variable speed
★ air condition system
★ control strategy
論文目次 摘要 I
Abstract II
致謝 III
目錄 IV
表目錄 VII
圖目錄 VIII
符號說明 XII
第一章 前言 1
1.1 研究背景 1
1.2 研究目的 4
第二章 文獻回顧 5
2.1 蒸發器飽和溫 5
2.2 蒸發器過熱度 8
2.3 冷凝器飽和溫 10
2.4 變頻控制器控制參數 14
2.5 控制參數間之關係式 18
2.6 總結 23
第三章 研究方法 24
3.1 室內溫度與壓縮機轉速以及壓縮機轉速與冷媒流量之關係式 24
3.1.1 蒸發器之質量方程式 24
3.1.2 蒸發器內能量方程式 25
3.1.3 壓縮機轉速與冷媒質量流率 28
3.1.4 室內動態之能量方程式 33
3.1.5 室內溫度與壓縮機轉速關係式 33
3.1.6 估算壓縮機轉速 37
3.2 實驗系統 38
3.3 實驗量測設備 42
3.3.1 溫度量測 42
3.3.2 資料擷取系統 43
3.4 實驗步驟 44
第四章 結果分析與討論 46
4.1 不同室外溫之室內溫度與壓縮機轉速之關係 46
4.2 不同室外溫之轉移函數的係數變化 49
4.3 現行空調機之控制策略 51
4.3.1 室外溫度範圍為18.0 oC ~24.0 oC 51
4.3.2 室外溫度範圍為24.0 oC ~30.0 oC 54
4.3.3 室外溫度範圍為30.0 oC ~38.5 oC 58
4.3.4 壓縮機轉速停機與再啟動之控制策略 62
4.3.5 壓縮機啟動策略 66
4.3.6 初始轉速命令 67
4.4 溫度變化與壓縮機轉速變化之實驗結果比較 71
4.4.1 現有空調機之實際實驗結果與廠商提供資料之比較 72
4.4.2 反推溫差與壓縮機轉速之關係(含時間影響) 77
4.4.3 以多項式擬合壓縮機與溫差之關係(不含時間影響) 78
4.5 估算溫度差對應之壓縮機轉速(控制策略) 80
4.5.1 估算壓縮機轉速與現行空調機比較 84
4.5.2 設定溫差變化估算壓縮機轉速 88
第五章 結論 92
參考文獻 93
附錄A、蒸發器兩相區與過熱區之能量平衡 97
附錄B、連續時間模型系統鑑別基本原理 99
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指導教授 楊建裕(Yang, Chien-Yuh) 審核日期 2014-2-14
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