微型熱管系統散熱實驗與最大熱傳量之理論模式建立

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研究生：	林鴻文 Hung-Wen Lin
論文名稱：	微型熱管系統散熱實驗與最大熱傳量之理論模式建立 Heat Dissipate Experiments and Optimum Design of Maximum Heat Transfer Rate of Miniature Heat Pipes
指導教授：	林唯耕 Wei-keg Lin
口試委員:
學位類別：	碩士 Master
系所名稱：	原子科學院 - 工程與系統科學系 Department of Engineering and System Science
論文出版年：	2002
畢業學年度：	91
語文別：	英文
論文頁數：	105
中文關鍵詞：	微型熱管、熱傳量、雙相流
外文關鍵詞：	miniature heat pipe, heat transfer rate, two phase flow, Visual Basic
相關次數：	點閱：2 下載：0
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本篇論文主要分析在各種不同操作情況下微型熱管的操作性能。其中包括了熱管長度、管徑、操作溫度以及工作流體填充量。在實驗樣品中，以管徑分類為3mm、5mm、6mm以及8mm，管長則有100mm、150mm、200mm、300mm四種。還包括兩種不同操作溫度，分別為40℃以及50℃。經由微型熱管理論模式的推導與實驗驗證，並經由Visual Basic程式語言的編輯，發展出一套”雙相流冷卻系統模擬程式”的軟體。藉由程式的模擬，可以得出微型熱管的最佳化設計，而由資料庫的收集，可以迅速檢閱微型熱管的性能參數。
程式中也求得出在最大熱傳量時，蒸發部的最大溫度，這對理論情況模式中因雙相流熱傳而無溫差的情況來說是一項突破。

由實驗結果分析，最大熱傳量隨著熱管管長、管徑、操作溫度的增加而增加。

藉由程式與實驗的結果分析，在最大熱傳量的相對誤差均保持在10%左右，可得知實驗結果與模擬結果相當吻合。

The research about this thesis is analysis of miniature heat pipe with many kinds of operation conditions. They are containing heat pipe length, diameter, operation temperature and fluid inventory. The miniature heat pipe diameter varied from 3mm, 5mm, 6mm to 8mm, the miniature heat pipe length was 100mm, 150mm, 200mm and 300mm respectively. Two operation temperatures with 40 oC and 50 oC were introduced in this experiment. And we developed the “Two-Phase Cooler Simulation Program” via derived a series of miniature heat pipe theory equations and used Visual Basic Language. One can know the optimum design of the miniature heat pipe quality quickly from the database of the program.
In heat pipe manufactures, we have four variable types of diameter and length, and have two operation temperatures in experiment.

From the experiment results analysis, the maximum heat transfer rate is raise with increasing miniature heat pipe length, diameter and operation temperature.

Compare with program and experiment results, the relative error value of mean maximum heat transfer rate and simulation at each sample are about 10%, it is said that simulation program is very match the miniature heat pipe experiment results.

Acknowledgements                                         I
Abstract                                                II

Chinese Abstract                                       III

Contents                                                IV

Figures                                                 VI

Tables                                                 XIV

Nomenclature                                           XVI

Chapter1   Introduction                                1

Chapter2   Miniature Heat Pipe Theory Model              7

  2.1.、Miniature Heat Pip                         7

  2.2.、Miniature Heat Pipe Structure                     8

  2.3、Miniature Heat Pipe Working Principle              12

  2.4、The Miniature Heat Pipe Characteristic     13

  2.5、The Miniature Heat Pipe Theory Model              14

    2.5.1、Capillary Force                                14

    2.5.2、Liquid Pressure Drop                        15

    2.5.3、Gravitational Head                             18

    2.5.4、Maximum Heat Transfer Rate              18

    2.5.5、Temperature Distribution Before Dry Out Condition                                                  19

    2.5.6、Temperature Distribution After Dry Out Condition                                                  24

  2.6、Heat Transfer Constraints of Miniature Heat Pipe   26

  2.7、Transport Factor and Wicking Height Factor      28

Chapter 3   Experimental Apparatus and Method      34

  3.1、Miniature Heat Pipe Fabricates Process      34

  3.2、Experiment Requirement for Miniature Heat Pipe      37

  3.3、Miniature Heat Pipe Testing                        40

  3.4、Miniature Heat Pipe Performance Testing System      42

Chaper4    Experiment Result and Discussion               52

  4.1、The effects of the fluid inventory to maximum

       heat transfer rate                                 52

  4.2、The effects of heat pipe diameter to the maximum

       heat transfer rate                                  54

  4.3、The effects of the operation temperature to maximum

       heat transfer rate                                  55

  4.4、The effects of the operation temperature to maximum

       heat transfer rate                                  56

Chapter 5   Conclusions                                 86

  5.1、Conclusion                                          86

  5.2、Future Work                                         87

Reference                                                  88

Appendix A  Thermal Properties                        90

Appendix B  Operation Manual                               94

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11、“CPL圓形環路蒸發部之數值模擬熱傳現象”,李世昭,國立清華大學核子工程學系碩士論文,1995
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13、“Heat Transfer”,Yunus A. Cengel. McGraw-Hill,1998

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