摘要
在化工过程中,压缩功是一种很重要的机械能,可以通过对功交换网络进行集成实现压缩功的节约。考虑直接功交换器的工作效率以及真实气体压缩因子,通过构建分级超结构,以压缩功公用工程最小化为目标,建立了混合整数非线性规划模型。根据功量交换器的压力约束与流股的不分流约束,得到了直接功交换网络中高压流与低压流的匹配关系和最优的功交换网络。案例分析结果表明,优化后的功交换网络的压缩功公用工程比现行网络减少了21.2%,且与传统方法相比,本方法由于考虑了气体真实性质和过程效率,因而结果更接近实际、更加可靠。
In chemical processes,compression work is very important mechanical energy and can be conserved by work exchange network(WEN)integration.Considering the efficiency of the direct work exchange and the real gas compression factor,a mixed integer nonlinear programming model is established by constructing a multistage superstructure with the objective of minimizing the compression work utility.Based on the pressure constraint of the work exchange and the non-diversion constraint of the flow unit,the matching relationship between the high pressure stream and low pressure stream in the direct work exchange network and the optimal work exchange network are obtained.The results of case analysis indicate that the power utility can be reduced by 21.2%.Compared with traditional WEN works,this method takes the advantage of higher reliability because of the consideration of true gas property and process efficiency.
作者
杨森
张桥
YANG Sen;ZHANG Qiao(School of Chemical Engineering&Technology,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《控制工程》
CSCD
北大核心
2022年第10期1816-1820,共5页
Control Engineering of China
基金
国家自然科学基金资助项目(21736008)。
关键词
功交换网络
优化
数学规划
节能
Work exchange network
optimization
mathematical programming
energy conservation
