螺杆空压机加卸载工况下节能运行分析

摘要

介绍了螺杆空压机的消耗功率,分析了空压机排气压力对其容积效率的影响,得到了空压机容积流量的计算方法,建立了螺杆空压机的运行能耗模型.在加卸载运行工况下,利用MATLAB对其运行过程、运行能耗进行仿真,通过仿真证明了存在最优的卸载压力线,使其运行能耗最小化.最后结合螺杆空压机加卸载运行频率和最优卸载压力线,给出了其在加卸载运行工况下最优控制方案.%Air compressor power consumption was described.Based on analyzing screw air compressor volume flow efficiency under discharge pressure fluctuation conditions,the screw air compressor volume flow formula was obtained,and power consumption mathematic model were established also.Under load/unload operating conditions,to change the unload pressure value in accordance with the space step of 0.01MPa and consider the power consumption affected by current from unload to load,the screw compressor power consumption were simulated by MATLAB.The simulation shows that the existence of the optimal unload pressure value is proved.Power consumption is minimal with using the optimal unload pressure value.Finally,combining the load/unload operating frequency with the optimal unload pressure value,the optimal control method of screw compressor is given.