Optimization of heat exchanger design taking corrosion into account

Faes, Willem; Bael, Johan Van; Lecompte, Steven; Verbeken, Kim; Paepe, Michel De

doi:10.1016/j.tsep.2022.101277

Cited by 4 publications

(5 citation statements)

References 36 publications

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“…The air preheater should be made from materials with good corrosion resistance. Appropriate materials will protect the heat transfer surface from corrosion during condensation [14], [15].…”

Section: Figure 2 the Most Bottom Position Of Air Preheatermentioning

confidence: 99%

“…Increasing the tube thickness can provide better resistance against corrosion, ensuring longer-term operational reliability however can cause a decrease in heat transfer coefficient [14]. Increasing the tube thickness necessary in the air preheater to optimize the tube thickness and provide a longer lifetime of tube.…”

Section: Figure 3 Leakage In Air Preheater's Tubementioning

confidence: 99%

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The Influence of Tube Thickness on the Shell Side of the Air preheater As a Form of Corrosion Prevention

Ulyasa,

Slameto,

Widarti

2023

fld

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Air preheater as a heat recovery technology is generally applied in the powerplant industry and used to heat combustion air, which increases the efficiency of the combustion chamber in the boiler. In this case, air preheater has tubular recuperative type typically located at the bottom of the circulating fluidized boiler for utilizing the lowest temperature exhaust gas. A significant presence of SO2 in the exhaust gas can lead to cold-end corrosion and cause leaks. The low tube thickness in the air preheater provides a good heat transfer performance unfortunately the corrosion issue has not been considered. By increasing the tube thickness, its aimed to extend the life time of the tubes with good corrosion resistance. This study is performed with calculations using empirical equations and validated results using Heat Transfer Research Inc (HTRI) software. Increasing the tube thickness impacts decreasing the heat transfer coefficient, increasing the flue gas (shell) pressure drop, and increasing the fouling factor. The tube thickness which determined for the corrosion prevention design of the air preheater give an overdesign of 18.14%, a heat transfer rate coefficient of 1.726 Btu/hr. ft2. °F, a shell pressure drop of 0.000541 psi, and a fouling factor of 0.114 hr. ft2. °F/Btu.

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“…The air preheater should be made from materials with good corrosion resistance. Appropriate materials will protect the heat transfer surface from corrosion during condensation [14], [15].…”

Section: Figure 2 the Most Bottom Position Of Air Preheatermentioning

confidence: 99%

Section: Figure 3 Leakage In Air Preheater's Tubementioning

confidence: 99%

The Influence of Tube Thickness on the Shell Side of the Air preheater As a Form of Corrosion Prevention

Ulyasa,

Slameto,

Widarti

2023

fld

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“…where vectors δT IN Based on these models, Liu et al [23] proposed an extended DP&C model by considering all the control loops between potential MVs and CVs rather than depending on a given HEN. The model is formulated as abbreviated in Equation ( 7) [19], for full details see Equations (A14)-(A19) in Appendix A.…”

Section: Extended Dpandc Model Based On Superstructure Representationmentioning

confidence: 99%

“…Moreover, the work of Kookos and Perkins [16] was further extended by providing an effective flexibility index, performing the synthesis of flexible and controllable HENs. To search for more computationally efficient techniques, some authors have focused on the heat integration between artificial neural networks and swarm algorithms [17][18][19]. Furthermore, the operability requirement in an early design stage has been widely adopted and motivated the integration of process design and control [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimal Design and Operation of Heat Exchanger Networks with Controllability Consideration

Zhuang²,

et al. 2022

Sustainability

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Controllability reflects the ease that a process can be controlled in practical operating environment. However, an unclear influence between the HEN synthesis and the control structure selection has been not investigated for the work of controllability of heat exchanger network (HEN). To address this challenge, this paper proposes a multi-objective optimization method by considering both the quantitative measures of economic and controllability, i.e., minimizing the total annual cost (TAC) and the relative gain array number (RGAn). This method is developed using a HEN synthesis procedure where a model-based superstructure is employed to involve the set of the network configuration alternatives and all the potential control structures. The effects of minimum approach temperature (ΔTmin) on the multi-objective optimization problem are investigated to distinguish the consistent and opposite variations of TAC and RGAn. The consistent change enables us to solve the single objective optimization problem for economical HEN design as well as for taking controllability into account. The opposite change prompts the Pareto front of the two objectives in order to develop a trade-off strategy. Results indicate that this method helps in the determination of the relationship-based nature between network configuration and control structure to yield a HEN design with economic and controllability considerations.

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“…Recent literatures on this area of study are highlighted as, [29] worked on Model-based real-time prediction of heat exchanger, for predicting real-time estimation of the lowest heat exchanger surface temperature achievable via maximizing the process's potential via optimization; [30] investigated the need to optimally design heat exchanger taking corrosion into account due to heat transfer surface facing uniform corrosion (corrosion fouling)with a view that, utilizing a corroding material is feasible at a cheaper cost if corrosion rate does not surpass a particular threshold; [31] used NORSOK CO 2 corrosion rate prediction model and computational fluid dynamics for an out-header piping of air-cooled heat exchange with NORSOK M-506rand Euler-Euler technique solver, which gave good alignment of the model data with field observations and that integrating computational fluid dynamics with models, can accurately forecast regional rates of corrosion and identify areas prone to CO 2 corrosion; and [21] reviewed corrosion problems in pipelines of the oil and gas industries in API 5L steel pipe-lines, and suggested that corrosion inhibitors, protective coatings and protective coatings together with cathodic protection be widely used to enable oil and gas materials last longer(from microbial, sulfide stress cracking, H 2 -stress cracking and H 2 -induced cracking corrosion on the pipelines). The need to develop temperature models [32] to predict corrosion effect in a typical mild steel heat exchanger using two different fluids (water and MEA) at varying temperature has become necessary due to the usefulness of it in the industries.…”

Section: Introductionmentioning

confidence: 99%

The Use of Models to Evaluate Corrosion Effects on Mild Steel Heat Exchanger in Water and Mono Ethanol Amine (MEA)

Ojong,

Zina,

Omeke

et al. 2023

ACES

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Heat exchanger is an important equipment used in process industries for cooling and heating purposes. Its design configuration which involves the flow of cold and hot fluids within the exchanger subjects it to corrosion attack. The article utilized the principle of mass and energy conservation in the development of weight and temperature models to study the effect of corrosion on mild steel coupon inside the exchanger containing water and Mono ethanol amine (MEA). The models developed were resolved analytically using Laplace Transform and simulated using Excel as simulation tool and data obtained from experiment in the laboratory to obtain profiles of weight loss and temperature as a function of time. The weight loss and performance of mild steel under various corrosive conditions were examined which indicates the effect of corrosion on the mild steel heat exchanger in water and MEA media. The result shows that water is more corrosive than MEA at higher temperatures and at lower temperatures of 35˚C and 1 atm, MEA has inhibitive properties than water as indicated by the weight loss result with time. The comparative analysis between the results obtained from the model simulation and experimental results shows that the result obtained from the model is more reliable and demonstrated better performance characteristics as it clearly shows mild steel heat exchanger experiences more corrosive effect in water medium than MEA at higher temperatures.

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Optimization of heat exchanger design taking corrosion into account

Cited by 4 publications

References 36 publications

The Influence of Tube Thickness on the Shell Side of the Air preheater As a Form of Corrosion Prevention

The Influence of Tube Thickness on the Shell Side of the Air preheater As a Form of Corrosion Prevention

Multi-Objective Optimal Design and Operation of Heat Exchanger Networks with Controllability Consideration

The Use of Models to Evaluate Corrosion Effects on Mild Steel Heat Exchanger in Water and Mono Ethanol Amine (MEA)

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