Using numerical simulation method, detailed dynamic pressure variations, transient gas temperature and mass flow rate in the PTR, and the coefficient of performance of PTR and the exergy losses of all parts of PTR were obtained.

• 用数值模拟方法得到了制冷机内部各点的压力、温度、质量流率等参数的瞬时变化情况及整机的制冷系数，并得到了制冷机各部件的（火用）损失及整机的（火用）效率。