补油参数对离子液体氢气压缩机的性能影响

Effects of the oil recharging parameters on the performance of the ionic liquid compressor

为了研究离子液体压缩机的热力性能,建立了离子液体压缩机的能耗分析模型,分析了离子液体压缩机中的能量转化机制,将整个系统的能量损耗分为液压损耗、油缸损耗和气缸损耗,再进一步根据损耗发生部件和原因细分为溢油损耗、补油损耗、管道损耗、缓冲损耗、摩擦损耗、进气阀损耗、排气阀损耗和换热节能等7个部分,对单级离子液体压缩机进行了仿真计算,并对仿真模型进行了试验验证。结果表明,在所有压损中,溢油损耗、补油损耗、缓冲损耗是最主要的3个部分,通过调节补油压力和补油泵流量可改变这3个损耗的大小并影响压缩机的绝热效率;补油压力的变化主要影响溢油损耗值,当补油压力从1 MPa增大到6 MPa,溢油损耗增大了20.6%,绝热效率降低了10.57%;补油泵流量变化主要影响补油损耗值,当补油泵流量从20 L/min增大到120 L/min,补油损耗增大了35.8%,绝热效率降低了21.84%。研究可为离子液体氢气压缩机的高效设计和运行提供理论依据。

To study the thermal performance of the ionic liquid compressor,this paper established an energy analysis model,based on which the energy conversion mechanisms were investigated and the energy loss was categorized into three parts:the hydraulic loss,the oil cylinder loss and the gas cylinder loss.Based on the sources of where the losses took place,the energy loss was further subdivided into overflow loss,recharge loss,pipe loss,buffer loss,friction loss,suction loss,discharge loss and heat transfer energy-saving.A simulation model for the single-stage ionic liquid compressor was developed and validated experimentally.The results indicated that the overflow loss,recharge loss and buffer loss were the most significant contributors.The pressure and flow rate of the recharge pump primarily affected the adiabatic efficiency by changing these three dominating losses.Specifically,the increase in the recharge pressure from 1 MPa to 6 MPa led to a 20.6%growth in the overflow loss and a 10.57%reduction in the adiabatic efficiency,while the increase in the flow rate of the recharge pump from 20 L/min to 120 L/min resulted in a 35.8%growth in the recharge loss and a 21.84%reduction in the adiabatic efficiency.The research can provide theoretical basis for the efficient design and operation of ionic liquid hydrogen compressors.