Influence of water vapor condensation on exhaust gas recirculation cooler fouling

Warey, Alok; Bika, Anil Singh; Long, David A.; Balestrino, Sandro; Szymkowicz, Patrick G.

doi:10.1016/j.ijheatmasstransfer.2013.06.063

Cited by 34 publications

(11 citation statements)

References 25 publications

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“…Numerous studies have been performed on the behavior of vapor condensation to understand its mechanism under various conditions [8,9,10,11]. Condensation which occurs on a surface is more frequent than that found directly in the vapor phase because of the wide existence of solid substrate that can be seen as the nucleus.…”

Section: Introductionmentioning

confidence: 99%

The Impact of the Electric Field on Surface Condensation of Water Vapor: Insight from Molecular Dynamics Simulation

Wang

Xie

et al. 2019

Nanomaterials

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In this study, molecular dynamics simulations were carried out to study the coupling effect of electric field strength and surface wettability on the condensation process of water vapor. Our results show that an electric field can rotate water molecules upward and restrict condensation. Formed clusters are stretched to become columns above the threshold strength of the field, causing the condensation rate to drop quickly. The enhancement of surface attraction force boosts the rearrangement of water molecules adjacent to the surface and exaggerates the threshold value for shape transformation. In addition, the contact area between clusters and the surface increases with increasing amounts of surface attraction force, which raises the condensation efficiency. Thus, the condensation rate of water vapor on a surface under an electric field is determined by competition between intermolecular forces from the electric field and the surface.

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Section: Introductionmentioning

confidence: 99%

The Impact of the Electric Field on Surface Condensation of Water Vapor: Insight from Molecular Dynamics Simulation

Wang

Xie

et al. 2019

Nanomaterials

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“…Abd-Elhady et al [1] reported that particulate fouling can profoundly be suppressed if the gas velocity is above a critical value defined as the bulk velocity above which rolling of the deposited particles occurs. Warey et al [7] offered a 1-D model for soot particle deposition, particle removal and condensation of six (HC) species between C15-C24 alkanes in a circular pipe at constant wall temperature in the turbulent flow regime.…”

Section: Introductionmentioning

confidence: 99%

Metal foams as gas coolers for exhaust gas recirculation systems subjected to particulate fouling

Hooman

Malayeri

2016

Energy Conversion and Management

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This paper presents experimental results indicating the benefits and challenges associated with the use of metal foams as Exhaust Gas Recirculation (EGR) coolers. Fouling of such heat exchangers is a critical issue and, as such, special attention has been paid to address this very issue in the present study where a soot generator has been employed to simulate the engine running condition. Effects of aluminium foam PPI and height as well as gas velocity are investigated. It has been noted that proper design of the foam can lead to significantly higher heat transfer rate and reasonable pressure drop compared to no-foam cases. More interestingly, it is demonstrated that the foams can be cleaned easily without relying on expensive cleaning techniques. Using simple brush-cleaning, the foams can be reused as EGR gas coolers with a performance penalty of only 17% (compared to a new or clean foam).

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“…It is always related to one of the main exhaust gas composition, Particulate Matter (PM) which is a combination of soot particles, soluble organic fraction (SOF), sulfates and unburned hydrocarbon [30]- [32]. Additionally, the condensed HC was also considered as the main constituent of the fouling layer due to its significant effects on fouling growth [33].…”

Section: Particulate Fouling In Egr Coolersmentioning

confidence: 99%

Particulate Fouling and Challenges of Metal Foam Heat Exchangers

Anuar

Malayeri

Hooman

2016

Heat Transfer Engineering

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In recent years, open-cell metal foam has gained attention for utilization as Exhaust Gas Recirculation (EGR) coolers due to its large surface area and porous structure. Theoretically, the porous foam structure would have better transfer heat through conduction and convection processes. However, the exhaust gases that enter the cooler would carry particulate matter (PM) which may deposit within the foam structure. The existing fouling studies cannot explain the underlying mechanisms of particulate deposition thoroughly within the foam structure. This study reviews the particulate fouling of heat exchangers, particularly in the exhaust gas recirculation system. Some past approaches to investigate fouling, particle transport and deposition in the metal foam heat exchangers for many different applications are also included. In addition, this study also includes the challenges that lie ahead in implementing the metal foam heat exchangers in the industries.

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Influence of water vapor condensation on exhaust gas recirculation cooler fouling

Cited by 34 publications

References 25 publications

The Impact of the Electric Field on Surface Condensation of Water Vapor: Insight from Molecular Dynamics Simulation

The Impact of the Electric Field on Surface Condensation of Water Vapor: Insight from Molecular Dynamics Simulation

Metal foams as gas coolers for exhaust gas recirculation systems subjected to particulate fouling

Particulate Fouling and Challenges of Metal Foam Heat Exchangers

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