Heat exchanger network synthesis for batch processes involving heat storages

doi:10.3969/j.issn.0438-1157.2013.12.008

Abstract

Abstract: Having time-dependent streams makes the heat exchanger network (HEN) synthesis of batch process much more complicated than its continuous partner.In this paper,heat storages are employed to overcome the time-dependent limit and heat storages and heat exchangers are combined for sake of equipment cost reduction.To obtain the optimal solution,a nonlinear programming (NLP) with the objective of minimize total annual cost is established for the overall HEN synthesis,including the optimization of heat storage temperatures.At last an example is used to show the application and effectiveness of the proposed methods.

Key words: systems engineering, optimal design, batch process, heat storage, heat exchanger network, mathematical modeling

摘要： 间歇过程流股对时间的依赖性增加了其换热网络综合的难度。提出了一种采用间接换热进行换热网络综合的方法，且考虑了直接换热，同时提出了合并热储罐的方法，并利用热储罐的特点合并间接换热中的换热器，用以减少设备费用，以热储罐中介质的温度为变量以年度总费用最小为目标函数建立非线性规划数学模型，确定热储罐内介质温度，最后将该方法应用于实例中证明此方法的有效性。

关键词: 系统工程, 优化设计, 间歇过程, 热储罐, 换热网络, 数学模拟

CLC Number:

TQ028.1

DU Jian, YANG Po, LIU Linlin, LI Jilong, CHEN Jing, CHEN Pengpeng. Heat exchanger network synthesis for batch processes involving heat storages[J]. CIESC Journal, 2013, 64(12): 4325-4329.

都健, 杨坡, 刘琳琳, 李继龙, 陈静, 陈鹏鹏. 带有热储罐的间歇过程换热网络综合[J]. 化工学报, 2013, 64(12): 4325-4329.

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