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研究生: 宋祥弘
Song, Xiang-Hong
論文名稱: 應用類神經網路法建立一鰭片式熱交換器動態模型
Dynamic Modeling of Fin-tube Heat Exchangers using Neural Network
指導教授: 陳介力
Chen, Chieh-Li
學位類別: 碩士
Master
系所名稱: 工學院 - 航空太空工程學系
Department of Aeronautics & Astronautics
論文出版年: 2018
畢業學年度: 106
語文別: 中文
論文頁數: 50
中文關鍵詞: 類神經網路蒸發器熱交換器數值模擬
外文關鍵詞: Artificial Neural Network, Numerical Simulation, Heat exchanger, Evaporator
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  • 本研究運用類神經網路(Artificial Neural Network)建立一蒸發器動態模型。模型建立利用SolidWorks進行繪製並利用COMSOL Multiphysics軟體進行蒸發器之數值模擬,觀察其溫度場及速度場之變化。透過模擬所得之數據,利用類神經網路建立蒸發器動態模型。
    在類神經網路中,影響蒸發器出口溫度的參數包含:蒸發器入口溫度、流場中速度及蒸發器鰭片溫度,經由不同的參數影響可得到不同的蒸發器出口溫度,以此關係建立蒸發器動態模型。
    研究結果顯示,透過類神經網路所建立之蒸發器動態模型,在COMSOL數值模擬中將其取代原蒸發器,並與原模型進行比較,其誤差位於可接受範圍內,因此往後在蒸發器應用中之模擬,皆可用此模型替代蒸發器,減少模擬的困難度。

    In this thesis, we uses an artificial neural network to establish an evaporator dynamic model. The models are drawn by SolidWorks and use the COMSOL Multiphysics software to simulate the evaporator and observe the changes in temperature and velocity fields. According to the simulation of the data, the neural network is used to establish the evaporator dynamic model.In the neural network, the parameters affecting the evaporator outlet temperature include: evaporator inlet temperature, velocity in the flow field, and evaporator fin temperature. These parameters are used to establish the evaporator dynamic model.We replace the original evaporator with the evaporator dynamic model which is established by the neural network in the COMSOL numerical simulation and compare it with the original model. The error is within the acceptable range. The results show that in the evaporator application simulation, the evaporator can be replaced by this model to reduce the difficulty of the simulation.

    目錄 i 摘要 iii Extended Abstract iv 致謝 xii 圖目錄 xiii 表目錄 xv 符號表 xvi 第一章緒論 1 1.1研究背景與動機 1 1.2 文獻回顧 3 第二章 蒸發器模型建立 4 2.1 數值方法 4 2-1-1 流場統御方程式 4 2-1-2 紊流模型(Turbulence Model) 5 2.2 風扇特性曲線應用 7 2.2.1風扇模擬驗證 8 2.3 蒸發器模型 14 2.3.1 獨立性分析 14 2.3.2 蒸發器模型模擬結果 15 第三章 類神經網路的應用 20 3.1 類神經網路法與其應用 20 3.2類神經網路模型 20 3.3倒傳遞類神經網路法 24 3.4 數據前處理 32 3.5 類神經網路運作流程 32 3.6 蒸發器之動態模型建立 33 第四章 結果與討論 41 第五章 結論與未來展望 46 參考文獻 47

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