The Development of a Gamma-Type Stirling Engine with the Feature Acquiring Thermal Power Data

To explore the effect of operating parameters on the performance of Stirling engines conveniently, this research developed a Stirling engine with the feature that user can easily acquire the working fluid thermal properties (such as temperature and pressure) and engine power output. A commercially available Gamma-type Stirling engine was used as the main part and some modification were carried out to make the engine with the characteristic of high thermal resistance. A pulley was installed on a DC motor /generator and a belt was used to connect the flywheel of the engine and the pulley. When the engine is running, electricity is generated by the DC generator. Four temperature sensors were separately installed on the inner and outer walls of the engine's displacer cylinder, and a pressure sensor was installed on cold side wall of the displacer cylinder. The temperatures of the inner and outer walls of the hot and cold side of the displacer cylinder, and the working fluid pressure in the displacer cylinder can be acquired while the engine is running. Two experiments with different operation conditions were carried out, and the temperatures, pressures, rotation speeds and power outputs were acquired by using a purposed build and low-cost data acquisition system, respectively. After analyzing the rationality of the experimental data, it shows that the target engine has been successfully developed.

關鍵字

Stirling engine ； thermal properties ； power output

並列摘要

為便於探究各操作參數對史特靈引擎性能之影響，本研究開發一具可容易量測熱力性質（包含溫度與壓力）、功率輸出（包含直流馬達轉速與電壓）之史特靈引擎。以市售伽瑪型史特靈引擎為主體，修改部分零件使其耐熱；連接皮帶輪以利帶動直流馬達（發電機）發電，並於引擎移氣器汽缸冷熱端開設孔口並於內外部分別裝置溫度感測器，且在移氣器汽缸冷端開設孔口並裝置壓力感測器，以利量測引擎運轉時移氣器汽缸冷熱端內外壁溫度及氣體壓力。經過進行兩種不同條件的引擎運轉，並經由一個自行開發低消費之數據擷取系統分別擷取溫度、壓力、轉速及輸出功率，再透過分析前述實驗數據的合理性後，證明本研究之目標引擎開發成功。

並列關鍵字

史特靈引擎；熱力性質；輸出功率

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