Study on the control of piston motion trajectory in ionic liquid hydrogen compressor

The ionic liquid hydrogen compressor, known for its high efficiency, pollution-free operation, and high-pressure large-displacement capabilities, has garnered significant attention in the field of hydrogen storage. The piston motion trajectory of the compressor affects the dynamic characteristics and working efficiency during the hydrogen compression process. Therefore, it is necessary to control the piston motion trajectory of the compressor. This paper analyzes the dynamic characteristics, exhaust quality, and energy loss of the piston motion process in an ionic liquid hydrogen compressor under three different motion states. The results indicate that in the U-C operating state, the compressor consumes the most energy and experiences the most severe impacts on the upper and lower limits; In the O-C operating state, the compressor consumes the least energy, but the piston still impacts and remains at the top and bottom dead centers; In the F-C operating state, the piston almost never impacts or remains at the top and bottom dead centers. The speed fluctuations during the reverse motion of the piston after reaching the upper and lower limits are also relatively smaller.