Optimization of cooling water system hydraulic debottlenecking

Souza, Jaime Neiva Miranda de; Levy, Ana; Costa, André L.H.

doi:10.1016/j.applthermaleng.2017.09.089

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…a,max a (10) Another factor considered in the air cooler design is the pressure drop, which directly affects the operating cost of air coolers.…”

Section: Model Formulationmentioning

confidence: 99%

“…The interaction among these parts and a comprehensive optimization of the whole system is taken into consideration. Research on CCWS is also involving other aspects of optimization, such as reduction of water consumption, 7,10 improvement of heat recovery efficiency, 11 energy saving capacity, 12,13 optimal network configuration, 14 and maximum economic benefit. 15,16 The research mentioned above mainly aims at system optimization when the operating parameters are constant.…”

Section: Introductionmentioning

confidence: 99%

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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,max a (10) Another factor considered in the air cooler design is the pressure drop, which directly affects the operating cost of air coolers.…”

Section: Model Formulationmentioning

confidence: 99%

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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“…Other aspects in the design and operation of cooling systems are the ones related to debottlenecking, 9 and the maximisation of the temperature difference between the supply and return temperature based on Life Cycle Costs analysis. 10 Two other aspects that have been the focus of attention are the design for the reduction of the heat transfer area of coolers 11 and the reduction of operating costs due to pumping.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive analysis of the thermohydraulic performance of cooling networks subject to fouling and undergoing retrofit projects

Lugo-Granados

Canizalez-Dávalos

Picón‐Núñez

2020

Energy & Environment

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The aim of this paper is to develop guidelines for the placing of new coolers in cooling systems subject to retrofit. The effects of the accumulation of scale on the flow system are considered. A methodology to assess the interconnected effect of local fluid velocity and fouling deposition is developed. The local average fluid velocity depends on the water flow rate distribution across the piping network. The methodology has four main calculation components: a) the determination of the flow rate distribution across the piping network, b) the prediction of fouling deposition, c) determination of the hydraulic changes and the effect on fouling brought about by the placing of new exchangers into an existing structure, and d) the calculation of the total cooling load and pressure drop of the system. The set of disturbances introduced to the system through fouling and the incorporation of new coolers, create network responses that eventually influence the cooling capacity and the pressure drop. In this work, these interactions are analysed using two case studies. The results indicate that, from the thermal point of view, the incorporation of new heat exchangers is recommended in series. The limit is the point where the increase of the total pressure drop causes a reduction in the overall volumetric flow rate. New coolers added in parallel create a reduction of pressure drop and an increase in the overall water flow rate; however, this increase is not enough to counteract the reduction of fluid velocity and heat capacity removal.

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“…The solution determines the pump size and diameters of the pipe sections (represented by the lengths of the subsections of commercial diameters). Finally, Souza et al 12 investigated the optimization of the hydraulic debottlenecking of cooling water systems, by means of substituting pipes and pumps together with the manipulation of valves to redistribute the total flow rate among the different coolers.…”

Section: Introductionmentioning

confidence: 99%

Globally Optimal Design Optimization of Cooling Water Systems

Levy

Souza

Bagajewicz

et al. 2019

Ind. Eng. Chem. Res.

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This study presents a globally optimal linear procedure for the simultaneous design of cooling water systems. The optimization entails obtaining optimal pipe diameters, pump selection, and detailed cooler design. For the latter, the Kern model and the linear formulation proposed by Gonçalves et al. (Ind. Eng. Chem. Res.2017565970) were used. The proposed linear model is compared with conventional design procedures, such as optimizing the design of each exchanger first, through area minimization or through area and pressure drop costs. The results illustrate in one of the examples the advantage of using the proposed simultaneous design approach.

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Optimization of cooling water system hydraulic debottlenecking

Cited by 12 publications

References 8 publications

Bi-Multiperiod Optimization of Industrial Cooling Systems

Bi-Multiperiod Optimization of Industrial Cooling Systems

Comprehensive analysis of the thermohydraulic performance of cooling networks subject to fouling and undergoing retrofit projects

Globally Optimal Design Optimization of Cooling Water Systems

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