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].

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