【作者】 李长春；

【导师】 花广如； 徐顺伟；

【作者基本信息】 华北电力大学 ， 机械工程， 2014， 硕士

【摘要】 压缩空气作为自动化工业的主要动力能源，大概占据了工厂总能耗的10%。整个压缩空气系统耗电量的96%最终是通过空压机来消耗的，因此随着能源形势的严峻，空压机的节能越来越成为企业和研究人员的关注重点。本文在了解螺杆空气压缩机的结构和运行原理的基础上，深入分析了影响空压机运行功率的影响因素，给出了等熵绝热压缩功率的计算公式和容积效率的计算方法。接着结合压缩功率和容积流量，建立了螺杆空压机群的能耗模型，并利用MATLAB进行仿真，证明了卸载线最优值的存在，提出了基于空压机卸载频率的最优控制方法。针对目前空压机群监控系统对空压机依次加卸载的问题，从节能的角度并考虑空压机的健康运行，提出一种基于加卸载队列的控制方法。对影响空压机运行效果的因素进行综合评价，得到加卸载队列，当压力发生变化时结合需求流量的估算，并根据压力变化预测趋势，达到提前控制，使系统能耗最小化。利用动态规划的方法，以一天为周期对空压机群进行运行调度，得到最优运行组合。基于LabWindows/CVI软件平台开发空压机群节能监控系统软件，将空压机运行参数、车间用气状况纳入监测管理范围，及时调度空压机运行以满足现场用气的需要，并保证设备的安全运行。在此基础上，本文结合山西漳山发电厂二期2×600MW工程供气中心空压机群控改造项目，充分验证了该系统了有效性，取得了良好的经济和社会效益。更多还原

【Abstract】 As the main driving energy of the industry, compressed air accounts for almost10%of the total energy consumption of the plant. And about96%of energyconsumption is consumed by air compressors, so energy-saving of air compressorbecomes the focus of the companies and researchers as the energy situationbecomes more and more severe.The power consumption of screw air compressors is analyzed and the formulasof isentropic adiabatic compression power and volumetric efficiency are given.Then combined with compression power and volume flow, the model of energyconsumption of compressors is established and simulated using MATLAB to provethe existence of the optimal value of unload pressure. Based on frequency ofload/unload of compressor the control method is proposed.Against the traditional control methods which load and unload compressorsfollowing by the static queue, a control method based on dynamic queue isproposed considering energy conservation and healthy operation of the aircompressor. To minimize energy consumption, one advanced control method basedon the trend of pressure changes and the estimate of flow demand is proposed. Andthe optimal combination of running for the cycle in a day is given using dynamicprogramming methods.Based on LabWindows/CVI, an energy-saving software of compressors groupcontrol system is designed. And it is of great significance to take the compressoroperating parameters, the gas plant condition monitoring and management intoconsideration, so the energy conservation can be achieved and at the same time thedemand of gas consumption can be met, what’s more, the safety of the device canalso be guaranteed. Finally,this article combines air compressor reconstruction project of Shan Xi Zhang Shan power plant Phase II(2*600MW)project, fully verifythe effectiveness of the system, The project has achieved good economic and socialbenefits.更多还原