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研究生:葉一凡
研究生(外文):Yi-Fan Yeh
論文名稱:噴霧冷卻應用於高功率電子元件之熱流特性分析
論文名稱(外文):Spray Cooling Thermal and Flow Characteristics for High Power Electronic Devices
指導教授:謝曉星錢志回
指導教授(外文):Hsieh, Shou-ShingChien, Chi-Hui
學位類別:碩士
校院名稱:國立中山大學
系所名稱:機械與機電工程學系研究所
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:英文
論文頁數:128
中文關鍵詞:μIPIμPIV噴霧冷卻高功率電子元件LED散熱壓電霧化片
外文關鍵詞:LED coolingμPIVμIPIHigh powered electronic devicesSpray coolingPiezoelectric atomizer film
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本實驗目的為利用陣列式微孔壓電霧化片作為主要噴嘴,建構一個以高功率電子元件(≥100W COB LED) 為主的微型噴霧冷卻系統,研究不同的實驗參數條件下,此微型噴霧冷卻系統的各種物理現象。本實驗量測噴霧速度、噴霧粒徑以及溫度,並且使用先進光學量測系統(μPIV、μIPI、LIF及IR detector)作為主要的量測工具,量測過程中改變微型噴霧冷卻系統之實驗參數,如壓電霧化片孔洞直徑、質量流率、熱通量和噴霧距離,探討對於電子元件散熱效果影響,同時將觀測霧化液滴在飛行過程中的軌跡與粒徑大小變化,研究其物理現象。
The purpose of this experiment is to use the piezoelectric atomizer film as a nozzle, set up a high-power electronic devices (≥ 100W COB LED) based micro-spray cooling system to study the different experimental parameters under the conditions of this micro-spray cooling system of various physical phenomenon. In this experiment, the spray velocity, spray particle size and temperature were measured, and the advanced optical measurement system (μPIV, μIPI, LIF and IR detector) was used as the main measurement tool. The experimental parameters of the micro-spray cooling system were changed during the measurement, such as porcelain diameter, mass flow rate, heat flux and spray distance, to discuss the effect of heat dissipation on electronic devices, while observing the change of trajectory and particle size of atomized droplets during flight and study their physical phenomena.
誌謝 i
摘要 ii
ABSTRACT iii
CONTENTS iv
LIST OF TABLES vi
LIST OF FIGURES vii
NOMENCLATURE x
CHAPTER 1 1
INTRODUCTION 1
1-1 Background 1
1-2 Research principle 2
1-3 Literature survey 4
1-4 Research purpose 15
CHAPTER 2 19
EXPERIMENTAL EQUIPMENT 19
2-1 Optical measurement system 19
2-2 Microporous piezoelectric atomization 21
2-3 High Speed Image Induction Capture System 22
2-4 Data logger system 22
2-5 Other peripheral equipment 23
CHAPTER 3 35
EXPERIMENTAL METHODS AND PROCEDURES 35
3-1 Spray cooling system 35
3-2 Optical measurement system 37
3-3 Heater test model 41
CHAPTER 4 46
THEORETICAL ANALYSIS 46
4-1 Weber (We) number 46
4-2 Reynolds (Re) number 47
4-3 Heat flux 47
4-4 Heat transfer coeffcient 48
CHAPTER 5 50
UNCERTAINTY ANALYSIS 50
CHAPTER 6 54
RESULTS AND DISCUSSIONS 54
6-1 Spray flow field 54
6-2 μPIV flow field 56
6-3 IPI particle size measurement 58
6-4 LIF Temperature field 59
6-5 Boiling curve distribution 60
CHAPTER 7 98
CONCLUSION AND RECOMMENDATION 98
7-1 Conclusion 98
7-2 Recommendation 99
REFERENCES 101
APPENDIX A 108
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