郭景宗Kuo, Jing-Tzong臺灣大學:機械工程學研究所陳聖翰Chen, Sheng-HanSheng-HanChen2010-06-302018-06-282010-06-302018-06-282008U0001-3006200814450200http://ntur.lib.ntu.edu.tw//handle/246246/187076本研究之主要目的是將熱電發電器（TEG）應用在汽車排放廢熱回收上，並探討熱電發電器適合與汽車結合的區域，其中包含汽車引擎排放廢熱的排氣管與引擎冷卻系統藉由實驗來探討在應用上的可行性，以實驗及數值模擬的方式來探討其影響熱電發電器的重要因素，同時運用數值模擬的方法檢驗其正確性。汽車排氣廢熱實驗中，當引擎轉速2000rpm時，熱電發電器冷熱端溫度分別為51℃及128℃，電流輸出0.454 A，電壓輸出1.531V，功率0.69W；在汽車引擎冷卻系統實驗中，當冷卻水溫90℃時，熱電發電器冷熱端溫度分別為38℃及86℃，此時電流輸出0.179 A，電壓輸出0.895V，功率0.16W。實驗證實熱電發電器的冷熱端溫差與其性能有著正比的關係。數值模擬中結果顯示，當冷熱之熱沉兩端受熱面積的比值為2.16時最佳，其熱電發電器的冷熱端溫差和熱傳導量，是未加裝熱沉的熱電發電器5倍，由此可知熱電發電器加裝熱沉對效能是非常重要。The main purpose of this research is to investigate the application of thermoelectric generator to recycling the waste heat from vehicle ,as well as to find suitable regions to equip the thermoelectric generator in a car. Those applicable regions include the exhaust pipe and engine cooling system. Experiments were performed to verify the feasibility of this application , while the key factors to affect the performance of thermoelectric generators were studied, and a suitable mathematical model of this system was built and verified. . n the experiments of waste heat from exhaust pipe, when engine speed reach 2000rpm, temperatures of hot and cold sides of thermoelectric generator were 51℃ and 128℃ respectively ,the output current, voltage and power output were 0.454A ,1.531V and 0.69W respectively . The engine cooling system tests indicated that, when the cooling water temperature was 90℃,temperatures of hot and cold sides of the thermoelectric generator were 38℃ and 86℃ , respectively. The output current , voltage ,and the power were 0.179A,0.895V and 0.16W,respectively .It was found that the temperature difference between hot and cold sides of the thermoelectric generator contributes a positive effect on the power performance .According to the results from numerical simulation , the maximum power output was obtained when the ratio of surface area of fins between the cold side to the hot side was 2.16 . The temperature difference and heat flux between the cold side and hot side of the thermoelectric generator were both about five times higher than those without equipping the heat sinks. Consequently , heat sink is significant to the performance of a thermoelectric generator.誌謝 I要 IIbstract III錄 IV目錄 VII目錄 VIII號說明 XII一章 緒論 1-1 前言 1-2 文獻回顧 2-3 研究動機與目的 5二章 理論分析 11-1 熱電效應原理 11-1-1焦耳效應 11-1-2西貝克效應 12-1-3 皮爾特效應 12-1-4 湯姆森效應 13-2 熱電發電器的材料性質 13-3 熱電發電器原理 15三章 實驗設備與步驟 22-1 熱電發電器性能量測實驗 22-1-1 熱電發電器性能量測實驗介紹 22-1-2 熱電發電器性能量測實驗步驟 22-2汽車引擎廢熱實驗 24-2-1汽車引擎廢熱實驗介紹 24-2-2 汽車引擎廢熱實驗步驟 24-4汽車冷卻系統實驗 25-4-1汽車冷卻系統實驗介紹 25-4-2汽車冷卻系統實驗步驟 26-5 實驗設備 26四章 數值模擬分析 33-1 數值模擬之統御方程式 33-2 數值模擬之設定 35luent設定如下: 35-3 汽車引擎廢熱實驗之CFD物理模型 36-3-1模擬汽車引擎廢熱實驗 36-3-2 討論熱沉長度對模擬的影響 37-3-3 實驗與模擬的比對 37-4 汽車冷卻系統實驗之CFD物理模型 38五章 實驗與數值模擬結果分析 42-1 熱電發電器性能量測實驗結果分析 42-2汽車引擎廢熱實驗與數值模擬比較 43-2-1 不同引擎轉速的影響 43-2-2 CFD數值模擬分析 44-2-3 討論數值模擬熱端熱沉長度對模擬的影響 45-2-4 實驗與模擬的比對 45-3汽車冷卻系統實驗與數值模擬比較 46-3-1熱端流體溫度的影響 46-3-2 數值模擬 47六章 結論與建議 71.1 結論 71.2 建議 73考文獻 751587370 bytesapplication/pdfen-US熱電發電器廢熱回收西貝克效應thermoelectric generatorwaste heat recyclingSeebeck effectthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/187076/1/ntu-97-R95522112-1.pdf