熱管的性能不僅取決於幾何參數，如壁厚、管材料，還有工作流體之熱力性能，如潛熱，蒸汽壓力，粘度，壓力和真空。HPPS(熱管性能模擬軟體)是由台灣清華大學的先進冷卻散熱實驗室所發展的以毛細理論預測熱管性能之軟體，其參數包括不同熱管材質、不同工作流體、真空度、填充量以及操作的溫度設定等等，並且以實驗量測熱管在不同真空度、填充量下之最大熱傳量，並探討各項參數對性能影響的重要性。最終之目標在能提供業界快速設計熱管性能之參考標準。
本實驗室發展19ψ鋁虹吸熱管，若工作流體為水時在固定操作溫度50℃，填充量25%時有150W之最大熱傳量；在理論上如果以25%填充量為基準時，除了35%填充量時有較大誤差(21.2%)，其餘最大熱傳量之實驗值與理論值誤差皆在10%以內。若工作流體為甲醇時，在填充量20%時有最大熱傳量130W，同樣以20%填充量為基準時，其在30%填充量時有最大誤差在17.5%，其餘皆在10%以內。實驗顯示無論以水或甲醇為工作流質之19ψ鋁虹吸熱管，在高真空壓力<10-2 torr，每減少10倍其最大熱傳量會降低20W，理論與實驗之誤差約在10%以內，在低真空壓力下(>10-2 torr)時，其壓力每增加10torr，最大熱傳量會減少30W以上，理論與實驗之誤差在20%以內。實驗結果顯示熱管真空壓力至少要高於10-2 torr，才不會造成熱移量之劇減。

Performance of heat pipe not only depends on geometry, such as wall thickness, pipe material, but also the thermal properties of the working fluid, such as latent heat, vapor pressure, viscosity, pressure and vacuum. HPPS (heat pipe performance Simulation program software) is a softwaremade by the advanced cooling heat laboratory Taiwan Tsinghua University to predict heat pipe performance with capillary structure theory , and its parameters include various heat pipe materials, different working fluids, vacuum degree, filling volume and operating temperature setting. Maximum heat transfer in different condition such as vacuum different degrees,orfilling volume can be measured by experiments.importance of each parameters can also bediscussed.The ultimate goal is to provide industry a reference standard of fastly desiging of heat piple.
19ψaluminum siphon heat pipe is developed, when the working fluid is water in 50℃,
With filing volume 25% the maximum heat transfer is 150W , theoretically, seting 25% filling level as a benchmark, except that a larger error % loading (21.2%) when filling level is 35%, the remaining value of the maximum heat transfer of the experimental and theoretical values of error are less than 10 %. When the working fluid is methanol in 50℃, the maximum of heat transfer is 130W with filling volume 20%, Also seting 20% filling level as a reference, there is a maximum error (17.5%) loding 30%, others are within 10% . Experiments show that whether using water or methanol as the working fluid of the heat pipe siphon 19ψaluminum in high vacuum pressure <10-2 torr, heat transfer will reduce 20W,when vacuum degree reduces by 10 times,and errors are within 10% . In low vacuum pressure (>10-2 torr), heat transfer will be reduced at least 30W when vacuum degree increases 10 torr,and experimental error of less than 20%. vacuum pressure of heat pipe must be at least higher than 10-2 torr,so that it will not cause thermal shift of the sharp decline.

摘要
Abstract
致謝
目錄
圖目錄 V
表目錄 VII
符號表
第一章 緒論
1-1前言
1-2文獻回顧恩
第二章 理論模式
2-1傳統熱管的限制與定義
2-2真空度對熱管最大熱傳量之影響
2-3毛細結構壓差理論
2-4真空壓力修正因子fNCG 之定義與計算
2-5熱管最佳填充量OFR之理論計算
2-6毛細結構熱管質量流率Term_n因子之計算
2-7虹吸熱管質量流率Term_n因子之計算
2-8熱管製程修正因子f’之計算
2-9熱管性能之指標
第三章 實驗測量與設備介紹
3-1虹吸熱管實驗量測設備與儀器
3-1-1熱管最大熱傳實驗步驟
3-1-2熱管量測軟體
3-2熱管製造流程
3-2-1熱管前置流程
3-2-2熱管填充及封管設備與方法
第四章 實驗結果與討論
4-1 HPPS之應用
4-1-1不同填充率、工作流體為水對虹吸熱管最大熱傳量的實驗與理論之比較
4-1-2不同填充率、工作流體為甲醇對虹吸熱管最大熱傳量的實驗與理論之比較
4-2-1不同真空度對虹吸熱管最大熱傳量之實驗與理論比較(工作流體為水)
4-2-2不同真空度對虹吸熱管最大熱傳量之實驗與理論比較(工作流體為甲醇)
4-3 HPPS不同工質填充率與Qmax之比較
4-4毛細結構熱管幾何參數對於性能之影響
4-5 不同真空度對毛細結構熱管最大熱傳量實驗與理論比較
第五章 結論
參考文獻

 

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