本研究以開發使用氣體彈簧與浮動移氣器之分置式史特靈冷凍機為主要目的，同時進行理論模型之建立與原型機開發。理論模型包含熱力模式與動力模式，其中熱力模式描述冷凍機各工作腔室之壓力、質量、溫度等熱力性質，並將各壓力代入動力模式；動力模式則據以計算受氣體彈簧驅動之移氣器的位移，配合活塞之瞬間位移資料，預測下一時間步距的各工作腔室之體積變化，再代回熱力模式重新計算各項熱力性質。藉由考慮系統內部能量損失的影響，而得出冷凍機瞬間之溫度、能量之變化。本研究同時發展分置式史特靈冷凍機原型機，在馬達轉速為850 rpm及使用1 atm空氣的條件下，製冷頭溫度已可達253 K的低溫。本研究進一步將理論預測與引擎量測所得數據進行比較，探討影響性能之關鍵參數與設計指標。

The present study is concerned with a split-type Stirling cooler by means of development of theoretical model as well as manufacturing of a prototype cooler that features a floating displacer along with a gas spring. In this study, the theoretical model consists of a thermodynamic model and a dynamic model. The thermodynamic model is used to calculate thermodynamic properties of working gas in all chambers, including pressures, gas masses, and temperatures, etc. The obtained pressures data are introduced into the dynamic model to determine instantaneous locations of the displacer so as to predict volumes of all the chambers at the next time step. The thermodynamic properties of the working gas in the chambers can then be calculated repeatedly. The temperature and energy variations are obtained from the theoretical model which taking into account effects of energy losses within the Stirling cooler. In addition, experimental data show that as using 1-atm air as the working gas and operated at a motor speed of 850 rpm, the prototype cooler is able to reach 253 K at the cold head. The experimental data are further compared with the theoretical predictions to fairly assess the effects of key parameters and design indices.

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