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系統識別號 U0026-1008201815110200
論文名稱(中文) 超材料熱集中器之數值模擬與實驗分析
論文名稱(英文) Numerical Simulation and Experimental Analysis of Metamaterial Thermal Concentrator
校院名稱 成功大學
系所名稱(中) 工程科學系
系所名稱(英) Department of Engineering Science
學年度 106
學期 2
出版年 107
研究生(中文) 卓書弘
研究生(英文) Shu-Hung Cho
學號 N96051342
學位類別 碩士
語文別 中文
論文頁數 52頁
口試委員 指導教授-楊瑞珍
口試委員-張建成
口試委員-楊鏡堂
口試委員-張志彰
口試委員-傅龍明
中文關鍵字 熱集中器  超材料  能量轉換 
英文關鍵字 Thermal concentrator  Metamaterial  Energy conversion 
學科別分類
中文摘要 本文以數值模擬及實驗量測研究超材料熱集中器,以集中熱能至特定區域。我們運用不同的材料參數,及邊界條件,繼而模擬熱集中器在定常態與暫態下溫度場之變化,並實際設計、製作熱集中器,透過紅外線熱影像儀拍攝其溫度場的實驗結果,來與模擬結果進行比較。模擬方面,藉由改變超材料的排列結構及幾何大小,來探討理想情況下,熱集中器對各物理量的影響;實作方面,我們參考模擬設定,並修正實驗誤差。由實驗結果及數值模擬的比較可知,溫度較高的一端,差異較大;溫度較低的一端,差異卻較小。我們懷疑是因為裝置表面與上方空氣還是有些許自然對流。因此,我們透過額外的實驗來證實我們的假說,而也確實使實驗與模擬結果有更加吻合的趨勢。本研究透過模擬與實驗的結果來設計最佳的熱集中器,在選擇熱集中器材料性質及設定冷熱源溫度時,能夠由此研究得到一個參考依據。
英文摘要 We design a thermal concentrator which is analyzed by both numerical simulation and experimental measurement. The goal is to concentrate heat energy to a specific area. We use different materials and boundary conditions to simulate the change of temperature field under steady and transient state. In addition, a thermal concentrator is also designed and fabricated. The temperature field is captured by an infrared thermal camera, and then compared with simulation results. In simulation, by changing the arrangement structure and geometric size of metamaterial, the effect of thermal concentrator on each physical quantity is discussed. In experiment, we take into account the simulation results and modify the experimental settings. The comparison of experimental result and numerical simulation shows that there is a large difference in the high temperature side and a small difference in the low temperature side. We suspect that there is some natural convection between the hot surface and the air above the device. To resolve our hypothesis, additional experiment is needed. The experimental results did improve when natural convection is considered. In this study, the optimal thermal concentrator was designed through both simulation and experimental processes. This research can provide useful understanding when it comes to select material properties of using metamaterial for thermal concentrator.
論文目次 中文摘要I
致謝VII
目錄VIII
圖目錄X
表目錄XIII
縮寫及符號說明XIV
第一章緒論1
1.1前言1
1.2轉換光學與轉換熱力學2
1.3奇特的熱學裝置3
1.4研究動機與目的8
1.5研究架構10
第二章基礎理論與分析11
2.1座標轉換下特定物理量的不變性11
2.1.1理論推導11
2.2等效介質理論13
2.2.1理論說明13
第三章實驗材料與方法15
3.1材料與試劑15
3.2儀器與軟體15
3.2.13D印表機15
3.2.2電子天平16
3.2.3真空抽氣裝置17
3.2.4加熱板18
3.2.5紅外線熱影像儀18
3.2.6靜態水槽19
3.2.7AutoCAD 201820
3.2.8COMSOL Multiphysics20
3.3材料分析20
3.3.1材料試片20
3.3.2材料放射率測試21
3.3.3材料熱導係數查驗24
3.4熱集中器裝置26
3.4.1裝置設計26
3.4.2裝置製造27
3.5實驗架設30
第四章結果與討論32
4.1熱學裝置於定常態下之熱通量模擬32
4.2熱集中器裝置於定常態下熱能集中效率及外部溫度場變形量之模擬 35
4.3熱集中器裝置由暫態到達至定常態之時間模擬40
4.4熱集中器裝置實驗分析與數值模擬之比較42
第五章結論與展望46
參考文獻48
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