臺灣博碩士論文加值系統

本實驗使用三種孔徑的超聲波微孔霧化片，對ITO透明加熱板進行噴霧冷卻，觀察噴霧冷卻加熱板底面暫態的沸騰區與非沸騰區的可視化流場觀測，其所使用之工作流體為去離子水，在暫態實驗中的主要參數為噴嘴與加熱板(ITO heater)之間距(Z = 30, 50, 70, 90, 100 mm)、加熱板中心溫度(Tc =25, 75, 125, 175, 225 oC)、孔徑大小(dj = 7, 10, 35 μm)，來觀測在不同時刻和不同參數下，液滴在加熱板上的暫態行為及動態粒徑分佈，並記錄加熱面溫度分佈，來分析噴霧冷卻對加熱面的溫度降，最後，藉由實驗的結果，來設計CPU的微型噴霧冷卻系統。本實驗使用T-type thermocouple、μPIV、高速攝影機已及紅外線影像儀(IR Detector)等儀器來量測並分析流場及熱場的特性。

In this study, we use an ultrasound micro-nozzle atomizer, made of piezoelectric ceramic material as the cooling system apparatus to observe the spray impinging on an ITO transparent heater. The working fluid is DI water and the main experimental parameters are the distance from nozzle to target, Z(30, 50, 70, 90, 100 mm), the temperature of the heater at the center point, Tc(25, 75, 125, 175, 225 oC), and nozzle diameter, dj(7, 10, 35 μm). The μPIV technique and a high speed camera are used to record the 2-D velocity distribution of a spray flow field on the side view and dynamic droplet size distribution on the lower view, respectively. In regard to the thermal characteristic, we use a data logger, T-type thermocouple wire and IR detector to record the surface temperature distribution on a transparent heater, and carry out an analysis of the heater’s temperature drop result from spray cooling. Finally, we develop a mini spray cooling system for CPUs or other electrical devices.

目錄
論文審定書 i
謝誌 ii
中文摘要 iii
Abstract iv
目錄 v
表目錄 vii
圖目錄 viii
符號說明 xi
第一章 序論 1
1-1前言 1
1-2背景 1
1-3文獻回顧 4
1-4研究目的 14
第二章 實驗室統與設備 15
2-1 微質點影像測速儀系統 15
2-2 超聲波微孔霧化片 16
2-3 ITO石英加熱板 17
2-4 數據擷取系統 17
2-5 交流電源控制系統 19
2-6 高速影像感應擷取系統 19
2-7 水位控制循環系統 19
2-8 其他實驗周邊設備 20
第三章 實驗方法及步驟 40
3-1 測試表面製作 40
3-2 噴霧系統製作 40
3-3 實驗參數 41
3-4 實驗方法 42
3-5 實驗步驟 43
第四章 理論分析 55
4-1 熱傳分析與計算 55
4-2 平均衝擊粒徑定義與計算 56
4-3 熱通量計算 56
4-4 噴霧熱損失計算 57
第五章 誤差分析 58
第六章 結果與討論 62
6-1 微孔霧化片μPIV流場分析 62
6-2 高速攝影及動態液滴分佈 64
6-2-1 高速攝影及動態液滴分佈 64
6-2-2 高速攝影及動態液滴分佈 64
6-3 溫度量測及熱傳分析 68
6-4 微型噴霧系統設計及性能量測 71
第七章-結論與建議 137
7-1 結論 137
7-2 建議與改進 138
參考文獻 139
附錄A 147
附錄B 154

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