臺灣博碩士論文加值系統

車用水箱為汽車引擎冷卻系統中最重要的機件，若車用水箱散熱能力不足，會導致周圍零件軟化、加速磨損、機油消耗量大及馬力降低等問題。因此，如何提促進水箱的散熱能力，是提升汽車引擎性能的關鍵課題。
提升車用水箱性能的方法包括改變鰭片形式及角度、改變工作流體及塗佈抗垢防蝕材料等。其中塗佈抗垢防蝕材料未有提升熱傳性能作用。因此本研究藉由奈米碳球作為塗佈材料，以不增加成本，除保有抗垢及防蝕效果，並可提升熱傳性能為研究目標。
本研究採用奈米碳球粉體塗裝商用波翼式及板翼式之車用水箱，以低速風洞、恆溫水槽、熱電偶、微差壓計及資料擷取器等設備進行量測，探討車用水箱有無塗裝奈米碳球材料，並在不同空氣側雷諾數(Rea=0~6214.2)及水側雷諾數(Rew=1222.8~5502.8)下，探究其熱液動性能的影響。
研究發現塗佈後波翼式車用水箱之熱傳性能最高提升23 %，最低提升8 %。塗佈後板翼式車用水箱之熱傳性能最高提升17 %，最低提升5 %。當空氣側流場為層流時，無塗佈板翼式之熱傳性能比無塗佈波翼式高約9 %。當空氣側流場為紊流時時，無塗佈波翼式之熱傳性能比無塗佈板翼式高約12 %。當空氣側流場為層流時，塗佈後板翼式之熱傳性能比塗佈後波翼式高約5 %。當空氣側流場為紊流時，塗佈後波翼式之熱傳性能比塗佈後板翼式高約16 %。

Automobile radiator is the key component in the cooling system of the engine for a car. There are some problems will be caused if the thermo- hydraulic performance overheating such as the parts soften, abrasion, amount of oil consumption and the power decrease. However, how to enhance the thermo-hydraulic performance of automobile radiators is a key problem in the vehicle industry.
The methods of enhance the automobile radiator performance such as change the angle of the fin and shape, change the working fluid and coated surface. But the method of the coated surface cannot enhance the thermo-hydraulic performance for automobile radiator. Therefore, the objectives of this study will use carbon nanocapsules material coating to enhance the automobile radiator performance without increase the principle. And also enhance the anti-fouling and the corrosion resistant features of the automobile radiator.
This study used carbon nanocapsules material coating to enhance the automobile radiator performance of wave-fin and plate-fin. And use the wind tunnels, thermostatic water bath, data miner and differential pressure gauges to measurement the automobile radiator performance of coated and uncoated carbon nanocapsules material. Finally, investigate the effects of automobile radiator thermo-hydraulic performance in different air-side Reynolds number (Rea=0~6214.2) and water-side Reynolds number (Rew=1222.8~5502.8).
The results show that, the averaged heat transfer performances of wave-fin radiator with coating the carbon nanocapsules materials have 8-23% higher than without coating. The averaged heat transfer performances of plate-fin radiator coating the carbon nanocapsules materials have 5-17% higher than without coating. When the air-side flow field is laminar, the plate-fin of automobile radiator without coating which heat transfer performance will higher than wave-fin automobile radiator without coating (increase about 9%). When the air-side flow field is turbulence, the wave-fin of automobile radiator without coating which heat transfer performance will higher than plate-fin of automobile radiator without coating (increase about 12%). When the air-side flow field is laminar, the plate-fin of automobile radiator with coating which heat transfer performance will higher than wave-fin of automobile radiator with coating (increase about 5%). When the air-side flow field is turbulence, the wave-fin of automobile radiator with coating which heat transfer performance will higher than plate-fin of automobile radiator with coating (increase about 16%).

摘要 i
ABSTRACT ii
致謝 iv
目錄 v
表目錄 viii
圖目錄 ix
第一章 緒論 1
1.1研究背景與動機 1
1.2文獻回顧 2
1.2.1改變鰭片構型對熱傳性能之相關研究 2
1.2.2不同工作流體對熱傳性能之相關研究 3
1.2.3塗佈材料對抗污垢及防腐蝕效果之相關研究 4
1.3研究目的 6
1.4本文架構 6
第二章 基礎理論 7
2.1車用水箱介紹 7
2.1.1引擎冷卻系統的組成 7
2.1.2車用水箱之結構 7
2.2奈米塗料介紹 8
2.2.1光學性能的應用 8
2.2.2電磁學性能的應用 8
2.2.3力學性能的應用 9
2.2.4流體力學性能的應用 9
2.3奈米碳球介紹 9
2.3.1奈米碳球的結構 9
2.3.2中空奈米碳球的製備 9
2.3.3中空奈米碳球的應用 10
2.3.4奈米碳球塗佈方式 10
2.4熱傳遞原理 11
2.4.1熱傳導 11
2.4.2熱對流 11
2.4.3熱輻射 13
2.4.3奈米碳球提升熱傳之原因 13
第三章 實驗設備與方法 19
3.1實驗設備 19
3.1.1低速風洞 19
3.1.2恆溫水槽 20
3.1.3風速計 20
3.1.4資料擷取器及熱電偶 20
3.1.4微差壓計 20
3.2測試件介紹 20
3.3塗佈方式介紹 21
3.4實驗方法與步驟 21
3.5實驗數據分析 21
3.5.1水側及空氣側散熱量計算 21
3.5.2水側及空氣側雷諾數計算 23
3.5.3水側及空氣側紐賽數計算 24
3.6誤差分析 26
3.6.1熱電偶 26
第四章 結果與討論 35
4.1不同水側及空氣側雷諾數對無塗佈表面波翼式車用水箱之熱液動特性探討 35
4.2不同水側及空氣側雷諾數對無塗佈表面板翼式車用水箱之熱液動特性探討 36
4.3有無塗佈表面對波翼式車用水箱之熱液動特性探討 37
4.4有無塗佈表面對板翼式車用水箱之熱液動特性探討 39
4.5塗佈表面與構型對車用水箱之熱液動特性探討 40
4.6塗佈表面與構型對壓降的影響 42
第五章 結論 50
5.1結論 50
5.2未來展望 50
參考文獻 52
作者介紹 58

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