利用三水合醋酸鈉固液態相變增進散熱能力之被動冷卻系統研究

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姓名

黃皓瑄(Hao-Hsuan Huang) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

利用三水合醋酸鈉固液態相變增進散熱能力之被動冷卻系統研究

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摘要(中)

為解決高功率LED晶片接面溫度過高的問題，本論文使用固態的三水合醋酸鈉相變材料相變時大量吸收潛熱的特性，延長高功率LED能夠使用的時間。本論文使用十水合碳酸鈉作為成核劑，證實能夠有效抑制三水合醋酸鈉嚴重過冷的問題。此外本論文基於總體熱含量法的概念建立了一套快速設計的方法，藉由數學式快速計算出相變式冷卻系統的有效使用時間以及設計上需要的系統參數。此外本論文中提出相變式散熱膠囊的概念，使相變式冷卻的方法能夠被更廣泛的應用。

摘要(英)

The junction temperature of high power LED is an essential issue for practical applications. In this work, the high latent heat of NaCH3COO·3H2O (Sodium Acetate Trihydrate, SAT) is proposed and utilized to prolong the practical using time of a high power LED. With the addition of NaCO3·10H2O as the nucleation agent, supercool phenomena of SAT can be effective suppressed. A quick design algorithm based on lumped heat capacity method to evaluate the working time and system parameters of a cooling system using PCM (phase change material) is derived and proposed with detail mathematical formulation. In addition, a PCM capsule concept is proposed to provide a flexible extension of the usage of PCM cooling.

關鍵字(中)

★ 三水合醋酸鈉
★ 相變
★ 被動式散熱

關鍵字(英)

★ sodium acetate trihydrate
★ phase change
★ passive cooling

論文目次

目錄
摘要 1
Abstract 2
誌謝 3
目錄 4
圖目錄 6
表目錄 10
第一章緒論 11
1-1 前言 11
1-2 研究動機 13
第二章基本原理與文獻參考 14
2-1 引言 14
2-2 熱傳遞基本理論 14
2-2-1 熱傳導 14
2-2-2 熱對流 18
2-2-3 熱輻射 20
2-3 暫態傳導 21
2-3-1 總體熱含量法(Lumped capacitance method) 21
2-3-2 總體熱含量法的適用性 23
2-4 相變材料研究 24
2-4-1 相變材料選擇與特性分析 25
2-4-2 鹽類相變材料的過冷與相分離 27
2-4-3 成核劑與增稠劑 30
第三章相變研究實驗與數據分析 33
3-1 成核劑調配比例實驗 33
3-2 量測實驗架構與實驗方法 34
3-3 實驗結果與數據分析 35
第四章數值模擬與分析 51
4-1 有限元素分析流程 51
4-2 模型建立 52
4-3 相變模擬與結果分析 57
第五章快速設計 66
5-1 引言 66
5-2 快速設計法簡介 66
5-3 快速設計法實際應用案例 75
第六章結論 79
參考文獻 80
附錄 83
Appendix 1.石墨層放射率修正 83
Appendix 2.石墨層熱點溫度修正 85

參考文獻

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指導教授

鍾德元(Te-Yuan Chung)

審核日期

2016-6-29

推文