功热交换网络综合的研究进展

Research progress on work and heat exchange network synthesis

功和热是化工工业中使用能源的两种最主要方式,由于流股压力、温度操作需要消耗大量的功热,因此研究功热的协同利用对于提高过程整体能源利用率具有重要的意义。本文首先概述了基于热力学分析的功热交换网络综合的研究情况,以系统[火用]耗最小为目标探讨压缩机、膨胀机优化配置与换热网络用能瓶颈的耦合关系,揭示了功热协同利用的作用机制。然后系统地总结了以年度总费用最小为目标的数学规划模型综合功热交换网络的研究进展,探寻压力操作路径、流股功/热交换匹配、公用工程消耗量及设备投资之间的有效权衡;最后对后续研究进行展望,指出可进一步探究考虑流股冷热性质判定的功热交换网络同步综合、公用工程系统优化与功热交换网络同步设计的耦合等。

streams pressure and temperature manipulations consume large amount of work and heat,as two main forms of energy utilized in chemical industries,it is of vital significance for their cooperative utilization to improve the overall energy efficiency.Firstly,the researches on work and heat exchange network synthesis(WHENS)based on thermodynamic analysis were summarized,where the interaction mechanism of work and heat was revealed by investigating the coupling relationship between the optimization for placement of compressors/expanders and the bottleneck of heat exchange network(HEN)at the lowest exergy consumption.Afterwards,the research progresses of WHENS based on mathematical programming formulations aiming at the minimum total annual cost were systematically summarized to expound the efficient trade-off among pressure manipulation routes,work/heat exchange between streams,utility consumption and capital expenditure.Finally,the future researches were prospected,which focus on the simultaneous synthesis of work and heat exchange network considering the identification for cold/hot identity of streams,and combines the simultaneous design of work and heat exchange network with the optimization of utility system.