變頻空調機在不同環境下之控制策略

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姓名

曾薇甄(Wei-zhen Zeng) 查詢紙本館藏

畢業系所

能源工程研究所

論文名稱

變頻空調機在不同環境下之控制策略
(The controlling strategy of variable speed air condition in different condition)

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摘要(中)

本研究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 ℃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。
在相同室內溫度變化下，由室內溫與壓縮機轉速關係式所得之控制策略與現行空調機控制策略相比，壓縮機轉速約低200 rpm至400 rpm。

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.
Comparing the new control strategy with original control strategy in the same change of indoor temperature, the compressor speed of new control stragety is less 200 rpm~400rpm than oringal control strategy.

關鍵字(中)

★ 控制策略
★ 室內溫度與壓縮機轉速之關係式
★ 變頻空調機

關鍵字(英)

★ control strategy
★ air condition system
★ variable speed

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
符號說明 x
第一章前言 1
1.1 研究背景 1
1.2 研究目的 2
第二章文獻回顧 6
2.1 蒸發器飽和溫 6
2.2 蒸發器過熱度 7
2.3 冷凝器飽和溫 8
2.4 變頻控制器控制參數 9
2.5 控制參數間之關係式 11
2.6 總結 13
第三章實驗方法 25
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 25
3.1.1 蒸發器之質量方程式 25
3.1.2 蒸發器之能量方程式 26
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 30
3.1.5 室內溫度與壓縮機轉速關係式 30
3.2 實驗系統 34
3.3 實驗量測設備 34
3.3.1 溫度量測 34
3.3.2 資料擷取系統 35
3.4 實驗步驟 35
第四章結果分析與討論 44
4.1 室內溫度與壓縮機轉速之變化 44
4.2 不同壓縮機轉速變化之轉移函數 45
4.3 現行空調機之控制策略 47
4.3.1 室外溫度範圍為18.0 ℃~24.0 ℃ 47
4.3.2 室外溫度範圍為24.0 ℃~30.0 ℃ 48
4.3.3 室外溫度範圍為30.0 ℃~38.5 ℃ 49
4.3.4 壓縮機轉速停機與再啟動之控制策略 50
4.3.5 壓縮機啟動策略 51
4.3.6 初始轉速命令 51
4.4 空調機最佳控制策略與現行空調機控制策略之比較結果 52
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 52
4.4.2 溫度變化與壓縮機轉速變化之實驗結果比較 53
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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經濟部能源局，集合住宅節能技術手冊

指導教授

楊建裕(Chien-yuh Yang)

審核日期

2011-7-21

推文