摘要
回顾了多管程换热器构成的换热网络的最优综合方法与换热器详细设计的研究进展。研究者们采用多种不同算法对换热器进行详细设计,这些算法解决了对于单台换热器在给定热负荷的情况下,以总费用最小为目标的优化设计问题。但这些方法都是对单个换热器进行优化计算,并未考虑到换热器详细设计结果对换热网络节能降耗的影响。换热器详细设计结果将影响换热网络的能量交换与经济性。有研究者基于换热网络最优综合对换热器进行详细设计,同步优化换热网络和单台换热器的设计,但这些方法不涉及换热网络中各个换热器的详细设计与传热系数、换热压降等因素的相互影响,难以保证换热网络总费用最小。在此基础上,提出一种多程换热网络综合与换热器详细设计的同步优化设计方法。本文以换热面积、传热系数为优化变量,压降为约束条件,兼顾每台换热器详细设计,总费用最小为目标进行最优综合。示例分析证明了本文方法的有效性。
The development of the synthesis of heat exchanger network （HEN） and heat exchanger design are separately reviewed in this paper. Heat exchangers are detailed designed by researchers through many different methods, these methods can solve the problem which aims at total cost least only if the thermal load of each heat exchanger is constant, and the methods aim at one single heat ex- changer. But these methods are only about the optimal computation of one single heat exchanger which ignored that the results of the detailed design of heat exchanger have a great influence to the energy-saving and cost-reducing of the HEN. The energy exchange and economy of the HEN are influenced by the results of the detailed design of the heat exchangers. Some researchers design heat exchang- ers based on the synthesis of HEN, simultaneous optimized HEN and single heat exchanger design, but these methods ignored the rela- tionship among the heat transfer coefficient, pressure drop and heat transfer area of each heat exchanger in the HEN, therefore the cost will not be the least. On this basis, this paper puts forward a method that can solve the problem of integrated optimization of the integra- tion of the HEN and the detailed design of heat exchanger. Taking heat exchange area and heat transfer coefficient as optimization vari- ables and pressure drop as constraint condition, this paper covers detailed designs of each heat exchanger and realizes optimum synthe- sis with reaching minimum total cost as its goal. Case study demonstrated the effectiveness and application prospect of the presented method.
出处
《计算机与应用化学》
CAS
2016年第12期1248-1254,共7页
Computers and Applied Chemistry
基金
国家自然科学基金资助项目(21676295)
中国石油大学(北京)科研基金资助(2462015YQ0511)
关键词
换热网络
换热器
详细设计
综合
集成优化
heat exchanger networks
heat exchanger
detailed design
synthesis
integrated optimization
