用于液化天然气冷量回收的冷脉管发动机

A cold pulse tube engine for recovering LNG cold energy

脉管制冷机是一种主要应用于卫星上冷却探测器的低温制冷机。具有室温推移活塞的脉管制冷机是一种可逆脉管制冷机。其逆向循环为冷脉管发动机,是一种新的可用于液化天然气冷量发电的装置。用数值分析的方法阐述了其工作原理,分析了最佳扫气容积比与脉管长度的关系,讨论了扫气容积对功率的调节。

A pulse tube refrigerator is manly for cooling sensors in satellite.It is also important for ground using.A displacer pulse tube is one of the revisable pulse tube refrigerators which can operate at cold engine model to generate power by using the cooling energy of cooling sources such as LNG.A nodal analysis numerical model is used for the simulation of the cold pulse tube engine with the cooling energy of LNG.The basic working mechanism of the cold pulse tube engine is explained.It is shown that the optimum swept volume ratio of displacer over expander changes with the length of the pulse tube,the power of the cold pulse tube engine can be adjusted by the swept volume of the expander.