臺灣博碩士論文加值系統

本研究主要針對β型菱形驅動機構史特靈引擎進行熱力循環量測。首先引用Cheng and Yu [26]史特靈引擎熱力模式，利用此模式預測汽缸內部工作流體壓力及體積的循環變化，以及史特靈引擎在不同幾何參數下對於性能的影響。在實驗方面，本研究首先自製使用菱形驅動機構的史特靈引擎，引擎內部使用的工作流體為空氣，而熱源是以電熱器供給。本研究利用壓力感測器及雷射位移計觀測汽缸內部壓力變化及活塞運動軌跡，並同時於飛輪軸裝置編碼器，以量測引擎轉速。另外製作不同外徑的移氣器與三組不同轉動慣量的飛輪，再利用電熱器給予史特靈引擎不同加熱量，以探討在不同參數下，引擎性能的變化。
研究結果發現:將加熱端溫度提高，在實驗量測與熱力分析皆可使史特靈引擎之輸出功提高;再生通道間隙(G)為0.0006 m時可使史特靈引擎產生最大轉速，其轉速為3140 rpm。而在G=0.0004 m時，可使史特靈引擎產生最大輸出功，其最大輸出功率為11.2 W；改變飛輪的轉動慣量，對於汽缸內部壓力的變化並無太大改變；本研究所量測之P-V圖及熱效率，在G=0.0004 m及Th=1200 K時，與Cheng and Yu [26]之理論模式最為相近。

The present study is aimed at performance measurement of a beta-type Stirling engine with rhombic drive mechanism. The cyclic variation of pressure and volume of the working medium in the cylinder can be predicted by using the analytical model proposed by Cheng and Yu [26], and the influence on performance of the geometric parameters of Stirling engine is evaluated. In addition a 10-W Stirling engine with rhombic drive is made in this study. The working medium used in the the engine is air, and engine is heated by an electric heater in the experiment. By installing a pressure transducer and a laser displacement sensor, the variation of pressure inside the cylinder and trajectory of piston is measured. Meanwhiles, the rotational speed of the engine can be obtained by a rotary encoder connected to the shaft of the flywheel. Displacers with different outside diameter and flywheels with different moments of inertia are tested. And various heat sources are considered during the test of engine. In the experiments, a comparison in performance based on different operating parameters is attempted.
Results show that an increase in the heat source temperature yields a great increase in the power output of the Stirling engine. A similar trend is found both in the experiments and the simulation. The Stirling engine produces the highest rotational speed when the regenerative channel width (G) is settose 0.0006 m. The highest rotational speed is around 3140 rpm. When G =0.0004 m, the Stirling engine exhibits maxium power output and the maximum power
output is 11.2 W. A change in the flywheel moment of inertia leads to no appreciable difference in the cyclic variation of pressure in the cylinder. The experimental data for the thermal efficiency of the engine basically agree with the predictions from the anslytical model proposed by Cheng and Yu [26].

摘要 I
ABSTRACT II
誌謝 IV
目錄 VI
表目錄 IX
圖目錄 X
符號索引 XIV
第一章 序論
1-1研究背景與動機 1
1-2史特靈引擎的發展及特點 2
1-2-1史特靈引擎的發展史 2
1-2-2史特靈引擎的基本特點 3
1-3研究目的 4
1-4論文架構 5
第二章 史特靈之理論模式
2-1機構運動 6
2-1-1菱形驅動結構 6
2-1-2位移方程式 6
2-2熱力模式 7
2-2-1理論模式 7
2-3模擬結果 14
2-3-1 改變熱源溫度之影響 15
2-3-2 改變再生通道間隙之影響 15
第三章 史特靈引擎製作與實驗設備
3-1 史特靈引擎設計概念 17
3-2史特靈引擎機構設計與製造 18
3-3實驗量測設備 20
3-3-1加熱設備 20
3-3-2溫度量測系統 21
3-3-3壓力量測系統 21
3-3-4位移計量測系統 22
3-3-5轉速量測系統 22
3-3-6資料擷取系統 22
3-4實驗步驟 23
第四章 結果與討論
4-1 改變參數對於P-V圖之影響 24
4-2 改變參數對於引擎轉速之影響 25
4-3 改變參數對於史特靈引擎性能之影響 26
4-4 實驗結果與模擬之比較 27
第五章 結論與建議
5-1 結論 29
5-2 未來建議 30
參考文獻 32
表目錄 36
圖目錄 45
附錄 86

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