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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 research progress of the optimal synthesis method and heat exchanger design of heat exchanger network composed of multi-tube heat exchangers is reviewed. The researchers used a variety of different algorithms to design the heat exchangers in detail. These algorithms solved the optimization design problem with a single objective of minimizing the total cost for a single heat exchanger for a given thermal load. However, these methods are to optimize a single heat exchanger calculation, did not take into account the detailed design of the heat exchanger heat exchanger network energy saving. Detailed heat exchanger design results will affect the heat exchange network energy exchange and economy. Some researchers based on the optimal synthesis of heat exchangers for detailed design of heat exchangers, simultaneous optimization of heat exchange networks and single heat exchangers. However, these methods do not involve the detailed design and transmission of heat exchangers in heat exchange networks Heat coefficient, heat transfer pressure drop and other factors, it is difficult to ensure the minimum total cost of heat exchange network. On this basis, a synchronous optimization design method for multi-pass heat exchanger network synthesis and heat exchanger design is proposed. In this paper, the heat transfer area, the heat transfer coefficient for the optimization variables, pressure drop constraints, taking into account the detailed design of each heat exchanger, the total cost of the minimum as the goal of optimal synthesis. The example analysis proves the validity of the method in this paper.