Optimal synthesis of multiperiod heat exchanger networks: A sequential approach

Miranda, Camila de Brito; Costa, Caliane Bastos Borba; Caballero, José A.; Ravagnani, Mauro A.S.S.

doi:10.1016/j.applthermaleng.2016.10.003

Cited by 21 publications

(2 citation statements)

References 23 publications

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“…For instance, the simultaneous model of Isafiade and Fraser [10] for multiperiod heat exchanger network synthesis, which used a superstructure based on temperature intervals (Interval Based MINLP Superstructure, IBMS); the improved version of Floudas and Grossmann's framework [6] presented by Miranda et al [11]; the method of Kang et al [12], which was based on the most representative duration of periods, the meta-heuristic-based method of Pavão et al [13], and Jiang and Chang's [14] timesharing mechanism (TSM), which considered that a single set of heat exchangers could match different streams depending on the operating conditions. The TSM scheme was improved by Miranda et al [15], who achieved solutions with lower TAC with a mathematical model solved via deterministic methods, and by Pavão et al [16], who included a post-optimization step for the final structure.…”

Section: Introductionmentioning

confidence: 99%

Multiperiod work and heat integration

Pavão

Miranda

Ravagnani

et al. 2021

Energy Conversion and Management

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The synthesis of multiperiod heat exchanger networks (HEN) is a well-studied topic in heat integration. Several methods for identifying heat exchanger network designs that are able to feasibly operate under multiple conditions have been presented. Multiperiod models are certainly a notable form of achieving such resilient designs. In work and heat integration, however, solutions presented so far are for nominal conditions only. This work presents a step-wise optimization-based multiperiod work and heat exchange network synthesis framework. Hybrid meta-heuristic methods are used in the optimization steps. The methodology is able to obtain work and heat exchanger networks (WHENs) that are able to operate under multiple known scenarios. A set of critical conditions for stream properties in work integration is proposed. When these scenarios are modeled as finite operating periods (which are here referred to as non-nominal periods), a WHEN which can feasibly operate under nominal and critical conditions can be obtained. An example is tackled in two cases: the first, with one nominal and six critical, nonnominal periods; the second with two nominal and twelve non-nominal periods. Note that with that number of periods, the problem is considerably more complex than in multiperiod HEN synthesis (which usually comprises three or four periods). Solutions obtained with the present method are compared to those obtaining by simply merging single-period solutions obtained for each period individually. Capital investments are 30.2 % and 58.2 % lower in Cases 1 and 2 than in straightforwardly merged solutions. The capacity utilization parameters also demonstrate that the overdesign issue is notably reduced in these solutions.

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Section: Introductionmentioning

confidence: 99%

Multiperiod work and heat integration

Pavão

Miranda

Ravagnani

et al. 2021

Energy Conversion and Management

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“…However, many of the design parameters of CCWSs change periodically, such as atmospheric temperature, air humidity, and electricity price, most of which have been neglected in previous CCWS studies. The study of multiperiod methods has a wide range of applications in process systems engineering, such as in chilled water networks, in groundwater management, in reactor networks, in utility systems planning, in pipes planning, and in heat exchanger networks (HENs). , Kang et al first designed a nominal multiperiod HEN, used the flexibility index to recognize the bottlenecks of the HEN, and then established a debottlenecking model to finalize the design of a flexible multiperiod HEN. The water cooler network in the CCWSs is similar to the heat exchange network.…”

Section: Introductionmentioning

confidence: 99%

Bi-Multiperiod Optimization of Industrial Cooling Systems

Liao

Wang

Feng

et al. 2021

Ind. Eng. Chem. Res.

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In many chemical plants, a variety of cooling systems, including circulating cooling water systems and air coolers, are widely used to remove industrial waste heat. Current approaches for the design and optimization of these systems have focused on the use of constant parameters, including fixed temperature and energy price. Moreover, the ever-changing weather conditions play a major role in the design of cooler water systems and air coolers, leading to an unbalanced problem formulation that attempts to solve a complex problem with minimum rigor. Therefore, the concept of bi-multiperiod optimization is proposed to describe the daily/monthly change of weather conditions, as well as the fluctuation of electricity price during peak and off-peak periods within a day. The aim of this work is to obtain an economically optimal cooling system design under bi-multiperiod conditions by reasonably configuring both water coolers and air coolers. A mixed integer nonlinear programming (MINLP) model was established to obtain the optimal configuration. A case study derived from the literature shows that the optimized cooling network configuration using the proposed method is more economic than the deterministic design, the cooling water consumption is reduced by 5%, and the total cost is reduced by more than 9%.

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A simultaneous approach for the synthesis of multiperiod heat exchanger network using particle swarm optimization

et al. 2017

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In the present paper an approach for the synthesis of multiperiod heat exchanger networks (HEN) using particle swarm optimization (PSO) is proposed, wherein all variables are optimized simultaneously. The model uses a stage‐wise superstructure in which stream splitting is considered. The HEN is synthesized for each period individually and a timesharing scheme procedure is used to integrate all the structures of different periods automatically in a unique step. The HEN is able to operate in all the considered conditions and heat transfer devices can be used for different streams in different periods. Two case studies from the literature were used to test the developed model and results for the total annual costs were better than those found in the literature.

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Optimal synthesis of multiperiod heat exchanger networks: A sequential approach

Cited by 21 publications

References 23 publications

Multiperiod work and heat integration

Multiperiod work and heat integration

Bi-Multiperiod Optimization of Industrial Cooling Systems

A simultaneous approach for the synthesis of multiperiod heat exchanger network using particle swarm optimization

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