Improved threshold fouling models for crude oils

Shetty, Nitin; Deshannavar, Umesh B.; Ramasamy, M.; Pendyala, Rajashekhar

doi:10.1016/j.energy.2016.05.130

Cited by 21 publications

(17 citation statements)

References 26 publications

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“…Oil fouling of heat exchanger is a challenging problem in various industrial processes especially in petroleum refinery processes . Despite the practical significance of oil fouling, its effect on the performance of heat exchanger has not received enough attention from the researchers and it is not well characterized.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the practical significance of oil fouling, its effect on the performance of heat exchanger has not received enough attention from the researchers and it is not well characterized. Examining the literature indicates that there is a lack of quantitative evaluation of the effect of oil fouling on the heat exchanger performance especially in dispersion where the oil concentration is low. In addition, the effect of flow hydrodynamics on oils fouling is not well understood yet as the literature studies concerning this problem are scarce in particular for shell and tube heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

“…Previous works of oil fouling in heat exchanger reveal that the oil fouling resistance has different trends with time. Some studies reported that the fouling resistance increases asymptotically with time, while other studies showed linear increase. A decrease in oil fouling resistance with time and negative fouling rate was also reported at high flow velocity .…”

Section: Introductionmentioning

confidence: 99%

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Oil fouling in double‐pipe heat exchanger under liquid‐liquid dispersion and the influence of copper oxide nanofluid

Majdi

Alabdly

Hasan

et al. 2019

Heat Trans. Asian Res.

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Dispersions of oil in water are encountered in a variety of industrial processes leading to a reduction in the performance of the heat exchangers when thermally treating such two phase fluids. This reduction is mainly due to changes in the thermal and hydrodynamical behavior of the two phase fluid. In the present work, an experimental investigation was performed to study the effects of light oil fouling on the heat transfer coefficient in a double-pipe heat exchanger under turbulent flow conditions. The effects of different operating conditions on the fouling rate were investigated including: hot fluid Reynolds number (the dispersion), cold fluid Reynolds number, and time. The oil fouling rate was analyzed by determining the growth of fouling resistance with time and through pressure drop measurements. The influence of copper oxide (CuO) nanofluid on the fouling rate in the dispersion was also determined. It was found that the presence of dispersed oil causes a reduction in heat transfer coefficient by percentages depending on the Reynolds number of both cold and hot fluids and the concentration of oil. In addition, the time history of fouling resistance exhibited different trends with the flow rates of both fluids and its trend was influenced appreciably by the presence of CuO nanofluid. K E Y W O R D S copper oxide, dispersion, double-pipe heat exchanger, fouling, heat transfer, nanofluid, oil Heat Transfer-Asian Res.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Oil fouling in double‐pipe heat exchanger under liquid‐liquid dispersion and the influence of copper oxide nanofluid

Majdi

Alabdly

Hasan

et al. 2019

Heat Trans. Asian Res.

View full text Add to dashboard Cite

show abstract

“…This strategy requires the use of tube inserts or initiation of consistent cleaning". Further to the previous studies that proposes that the initial fouling rates increases with increasing surface temperature or bulk temperature of crude oil, Shetty et al (2016) proposed a model which uses effective film temperature (Teff) in the Arrhenius expression.…”

Section: Models For Predicting Foulingmentioning

confidence: 99%

Fouling Phenomenon and Its Effect on Heat Exchanger: A Review

Ajayi¹,

Ogbonnaya²

2017

Frontiers in Heat and Mass Transfer

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Heat exchangers as a heat transfer device has gained wide applications across different levels of domestic and industrial set-ups. Various studies have been carried out to study, analyse and predict its performance. However, one major phenomenon that limits heat exchanger performance is attributed to fouling. Based on this, various studies and approaches have focused on reduction, elimination and mitigation of fouling. This study therefore focused on this. It reviewed several attempts that have been carried out to understand and mitigate the incidents of fouling in heat exchangers. The study found that despite the existing models developed towards understanding fouling, there is no single model that has provided an accurate prediction of fouling in all the different types of heat exchangers. Also, majority of existing results have limited applications and some of the solutions are only peculiar to particular type of heat exchanger. Further to this, majority of the study results only pointed to small scale laboratory test schemes and there is absence of in-situ measurements that predicts actual (real life) service performance.

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“…Various empirical, semi-empirical, and fundamental fouling models have been proposed to study the crude oil fouling phenomenon [8][9][10][11][12]. Most of the fouling models in literature predict fouling rates based on the operating conditions and fluid properties and the models do not include the mathematical descriptions of fluid flow and heat transfer processes.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulations of Crude Oil Fouling on Heat Transfer Surfaces

Gounder¹,

Emani²

2018

Computational Fluid Dynamics - Basic Instruments and Applications in Science

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Advancements in the computational techniques have led to the development of various numerical models and methods to predict the occurrence of crude oil fouling in heat exchangers. Computational fluid dynamics has been employed in the field of crude oil fouling research in the recent past, which led to the concept of investigating the effects of various operating conditions on deposit formations on heat transfer surfaces. Various processes associated with crude oil fouling, such as asphaltenes precipitation and chemical reactions, have been studied through CFD simulations. This chapter provides stateof-the-art review on various CFD approaches and describes the discrete-phase CFD modeling of crude oil fouling through asphaltenes deposition on heat transfer surfaces.

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Improved threshold fouling models for crude oils

Cited by 21 publications

References 26 publications

Oil fouling in double‐pipe heat exchanger under liquid‐liquid dispersion and the influence of copper oxide nanofluid

Oil fouling in double‐pipe heat exchanger under liquid‐liquid dispersion and the influence of copper oxide nanofluid

Fouling Phenomenon and Its Effect on Heat Exchanger: A Review

CFD Simulations of Crude Oil Fouling on Heat Transfer Surfaces

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