本研究對現有脈衝管式史特靈冷凍機進行性能改善，理論模式將冷凍機分成七個腔室，分別為壓縮室、後冷卻器、再生器、製冷頭、脈衝管、冷卻器以及儲氣室，並透過活塞位移以及初始條件求出各腔室之體積、質量及壓力後，將系統因內部產生的損失之影響帶入能量方程式得到各腔室溫度及製冷頭無負載溫度，並進一步求得性能係數，另外針對轉速分析其對溫度影響找出不同壓力下最佳操作轉速。另在實作上將線性馬達機構改為曲柄機構，實際量測冷卻器、後冷卻器之溫度，並架設可量測實體冷凍機溫度與性能之系統。最後將理論模擬與實驗結果相互比較以作為未來設計改良之參考。本研究發展之脈衝管式史特靈冷凍機，於環境溫度30 時，工作流體為5 atm氦氣之操作條件、馬達轉速2000 rpm，可獲得約195 K之無負載製冷溫度。

In this study, the performance of the existing pulse tube Stirling cooler is improved. The linear motor mechanism is changed to a crank mechanism. The theoretical model divides the cooler into seven chambers, which are compression chamber, aftercooler, regenerator, cold head, pulse-tube, heat exchanger, and reservoir. After finding the volume, the mass, and the pressure of working fluid in each chamber according to the displacement of the piston and the initial conditions, then the internal loss, the temperature of working fluid in each chamber, and the no-loading temperature of the cooling head can be solved by energy equations. Eventually, the coefficient of performance can be obtained. In addition, the influence of the rotation speed on no-loading temperature is analyzed to find the optimal operating rotation speed under different pressures. In order to verify the present model, the temperatures of the heat exchanger, the cold head, and the aftercooler are measured, and an experimental system for measuring the temperature and performance of the cooler is also set up. The pulse-tube Stirling cooler developed in this study can achieve a no-load cooling temperature about 195 K at an ambient temperature of 303 K, with 5 atm charged helium at 2000 rpm.

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