It is found that for the PTR studied the coefficient of performance of the double inlet type can be improved from 0.091 to 0.108 and from 25.04% to 29.95% for the corresponding exergy efficiency compared with the orifice type.

• 计算结果表明：针对所研究的脉管制冷机从小孔型到双向进气型的改进使得制冷机的制冷系数从0.；091提高到了0