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研究生:董騏鋒
研究生(外文):Qi-Fong Dong
論文名稱:應用雲端計算於空調設備性能分析
論文名稱(外文):Application of Cloud Computing in Performance Analysis of Air Conditioning Apparatus
指導教授:陳希立陳希立引用關係
口試日期:2017-07-29
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:機械工程學研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2017
畢業學年度:105
語文別:中文
論文頁數:68
中文關鍵詞:水對水型熱泵性能係數經驗回歸式不可逆性分析二氟一氯甲烷冷媒
外文關鍵詞:Water source heat pumpCoefficient of PerformanceEmpirical regression equationIrreversibilityFreon22 Refrigerant
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本研究目的為開發一個以量測四點溫度及功率來評估空調設備之性能係數與不可逆性的演算法,並將演算法發佈到雲端,實現雲端服務與空調檢測的結合。研究方法為,結合四點溫度、壓縮機功率、熱力學與流體力學之理論公式,在等焓膨脹的條件下,以猜測初始冷媒質量流率來計算壓降,並且以能量守恆作為收斂條件,最終以數值迭代的方式求得四點的狀態,並可進一步得到空調設備的性能係數及不可逆性。本研究演算法案例共有三個,案例一為殼管式熱交換器熱泵,著重目標為探討元件之不可逆性。經過研究發現,案例一中冷凝器的不可逆性占比相當高,以及在某些操作條件下,壓縮機的不可逆性會提高,使得性能係數迅速降低;案例二為板式熱交換器,目標為探討冷媒與水側性能係數的誤差值及不可逆性。經研究發現性能係數的誤差為3%,而不可逆性是壓縮機最高、冷凝器第二、蒸發器和膨脹閥相近;案例三為氣冷式冷藏機,著重目標為討論加裝冷媒優化裝置後,性能係數能提高多少百分比。經過研究發現性能係數約能提高20%。
雲端部分以兩台電腦作為伺服器,分別執行演算及資料儲存空間。客戶端可以藉由網路,使用手機、平板及個人電腦可使用本研究所提供的雲端服務。經過研究發現,本演算法處理一筆數據大約需要計算0.004秒,反應相當迅速。
The purpose of this study is to develop an algorithm to measure the performance and irreversibility of air conditioning equipment by measuring the four-point temperature and power, and publish the algorithm to the cloud to achieve the goal of combining cloud service with performance analysis of air conditioning equipment. The method to carry out this study was taking four-point temperature and power of compressor to calculate pressure drop by guessing the initial refrigerant mass flow rate under the condition of isenthalpic expansion, and the energy conservation law is used as the convergence condition. Finally, the state of the four points is obtained by numerical iteration, and the performance of coefficient and irreversibility of the air conditioner can be further obtained. In this study, there are three cases, one case is the shell-and-tube heat exchanger heat pump, focusing on the object to explore the irreversibility of the components. It is found that the irreversibility of the compressor is improved under certain operating conditions, and the performance coefficient is reduced rapidly. Case 2 is the plate heat exchanger, focusing on the object to discuss the error value and irreversibility of the refrigerant performance coefficient. It is found that the error of the performance coefficient is about 3%, and the irreversibility is the highest of the compressor, the condenser is the second, the evaporator and the expansion valve are similar; Case 3 is the air-cooled refrigerator, focusing on the discussion of the installation of refrigerant optimization device. It is found that the coefficient of performance can be increased by 20% after installing the refrigerant optimization device.
In the cloud computing part, there are two computer need for server. One server is used to carry out the algorithm and the other is used to data storage and query. Client can use personal computer, mobile phone or tablet to access to the service by web. In the study, the algorithm takes an average of 0.004 second to deals with a data.
口試委員會審定書 I
致謝 II
摘要 I
ABSTRACT II
目錄 IV
圖目錄 VI
表目錄 IX
符號說明 X
第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 2
1.3 研究動機與目的 6
1.4 研究流程 7
第二章 基礎理論 9
2.1 冷凍循環系統基礎理論 9
2.2 蒸氣壓縮冷凍循環系統基礎理論分析[9] 13
2.3 殼管式熱交換器的特性與壓損計算[11] 16
2.4 板式熱交換器的壓降分析 18
2.5 平滑管壓降分析 19
2.6 彎管壓降計算[12] 19
2.7 數值方法求解微分方程式 20
2.8 四點量測求性能係數邏輯及數值方法 21
2.9 雲端計算 22
第三章 實驗設備與研究方法 26
3.1 實驗設備 26
3.2 實驗方法 35
3.3 實驗數據量測與分析 36
3.4 實驗量測狀態點 36
第四章 實驗結果與討論 38
4.1 雲端計算 38
4.2 案例一:殼管式熱交換器熱泵實驗 41
4.3 案例二:板式熱交換器熱泵實驗 49
4.4 案例三:氣冷式冷藏主機 57
4.5 收斂速度分析 63
第五章 結論與建議 66
參考文獻 67
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[2]熱泵熱水系統 Q&A 節能技術手冊。台北市:財團法人台灣綠色生產力基金 會節約能源中心。
[3]G.L.Morrison ,T. Anderson and M. Behnia, 2004 Seasonal performance rating of heat pump water heaters, Solar Energy 76 (2004), pp. 147–152.
[4]H.Liang. and T.Kuehn., 1991, ''Irreversibility Analysis of a Water-to-Water Mechanical Compression Heat Pump'', Energy, Vol.16, No. 6, pp. 883 -896.
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[6]中華民國國家標準CNS草-制0990213,2010,熱泵熱水器之性能試驗法,中華民國經濟部標準檢驗局。
[7]鐘興達,2011,高溫瞬熱多功能熱泵系統之開發與研究,碩士論文,國立台灣大學機械工程學系,民國一百年七月。
[8]Stoecker, W.F. & J.W. Jones, “Refrigeration and Air Conditioning, 2/E, McGraw-Hill,Inc, 2007.
[9]Robert W. Fox, Alan T. McDonald, Philip J. Pritchard, “Introduction to Fluid Mechanics, Sixth Edition”, John Wiley & Sons,Inc.
[10]Robert Parsons (Author), Thomas H. Kuehn (Contributor), R. J. Couvillion (Contributor), John W. Coleman (Contributor), Narasipur Suryanarayana (Contributor), Zahid Ayub (Contributor), ASHRAE HANDBOOK : Fundamentals : Inch-Pound Edition, 2005
[11]王啟川,2001,熱交換器設計,五南圖書出版公司,台北。
[12]Jayanti S. Flow and Pressure Drop in Bends, 2011. DOI: 10.1615/AtoZ.b.bends flow and pressure drop in.
[13]Xiaoguang Fan, X.M., Lei Yang, Zhong Lan, Tingting Hao, Rui Jiang, Tao Bai,Experimental study on two-phase flow pressure drop during steam condensation in trapezoidal microchannels. Experimental Thermal and Fluid Science 2016. 76: p. 12.
[14]S.Kakaç , H.T.Liu . Heat exchangers: Selection, rating and thermal design.
[15]CRC Press; 1984 Ito, H., 1959. Friction factors for turbulent flow in curved pipes. Trans. Amer. Soc. Mech. Eng.J. Basic Eng. D81, 123– 134.
[16]陳任元,1995,板式熱交換器之板片數對其性能影響之分析,淡江大學機械工程研究所碩士論文。
[17]European Heat Pump Association,Testing of Water/Water and Brine/Water Heat Pumps,Version 1.8,2014
[18]http://www.kaori-bphe.com/tw/products/page/E_CATALOG
[19]Super-Efficient Equipment and Appliance Deployment, Heat Pump Water Heaters:Summary and Comparison of International Test Standards, Chapter 2, 2013
[20]陳勇男,「住商用熱泵系統搭配淺層溫能應用之研究」,國立台灣大學機械工程研究所碩士論文,2017
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