Fouling Characteristics of a Light Australian Crude Oil

Saleh, Zaid S; Sheikholeslami, R.; Watkinson, A. P.

doi:10.1080/01457630590890049

Cited by 54 publications

(40 citation statements)

References 1 publication

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“…Therefore, higher fluid velocities will favor less mass deposition and fouling rates. Various experimental studies have been performed to investigate the effects of flow velocities on coke deposition rate and fouling resistance and reported that the deposition rate and fouling resistance decreases with increased flow velocities [41][42][43]. The present CFD simulation results were also observed to follow the same trend with experimental studies.…”

Section: Resultssupporting

confidence: 78%

Effect of operating conditions on crude oil fouling through CFD simulations

Emani¹,

Yusoh²,

Gounder³

et al. 2017

IJHT

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Fouling in crude preheat trains in petroleum refineries affect the heat recovery from product streams significantly. Clear understanding on the effects of various operating conditions on fouling is still lacking among the researchers and practitioners. In the present study, a three-dimensional CFD model of a heat exchanger tube has been developed to predict the rate of coke deposition and fouling resistance through species-transport framework, in which, petroleum, asphaltenes and non-asphaltenes are represented as lumped pseudo-components in the crude oil. Asphaltenes particles were introduced into the bulk of crude oil and considered to be the only reactant for coke formation. The coke deposition rate and fouling resistance are predicted by varying the flow velocity, wall shear stress and surface roughness. From the CFD simulations, it is observed that the fouling resistance reduces under wall shear stress and surface roughness conditions as compared to no-slip and smooth surfaces, respectively.

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Section: Resultssupporting

confidence: 78%

Effect of operating conditions on crude oil fouling through CFD simulations

Emani¹,

Yusoh²,

Gounder³

et al. 2017

IJHT

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“…An increase in surface temperature increases the fouling rate exponentially which is observed in all mechanisms [13][14][15][16][17]. However, the effect of bulk temperature has contradicting observations with Lambourn and Durrieu [18], Fuhr et al, [19], Storm et al [20].…”

Section: Fouling With Crude Oilmentioning

confidence: 85%

Fouling and its effect on the thermal performance of heat exchanger tubes

Sarma¹,

Konijeti²,

Subramanyam³

et al. 2017

IJHT

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The phenomena of fouling and corrosion in heat exchanger tubes commonly encountered in industrial practice are reviewed in two phases. In the first phase, the influence of physical and chemical properties of petroleum crude on scaling and fouling are reviewed. Further, in the second phase a generalized hypothesis is provided for unsteady analysis as function of time with the aid of logarithmic, exponential and Power law variation of fouling factors with time. The time dependent thermal characteristics of typical parallel and counter flow heat exchangers are established with the aid of time dependent fouling factors. The approach presented is in good agreement with the reported values of a petroleum refinery. Thus, a method to estimate the critical period for maintenance of the heat exchanger is established treating fouling as a time variable occurrence.

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“…Others observe, are the increase in the fouling rates with the fluid temperature [10,11]. Radhakrishman et al [12] developed a predictive model using statistical methods which can a priori predict the fouling rate and decrease in heat exchanger efficiency.…”

Section: Introductionmentioning

confidence: 99%

The fouling in the tubular heat exchanger of Algiers refinery

2015

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List of symbols AThe heat transfer external surface (m 2 ) a ⊥ , a c⊥ The fluid passage area at side tube and side calender, respectively (m 2 ) C P The heat-storage capacity (kJ/kg °C) C Pf , Cp c The heat-storage capacity (kJ/kg °C) d The fluid circulating density at side tube di Tubes interns diameter (m) d 0,e Diamètre externe des tubes (m) d 4 15 Density D c , D e Diamètre de la calandre et diamètre hydraulique, respectivement (m) f t The friction factor F The correction factor G t The mass speed fluid circulating at side tube (kg/h m 2 ) h i The heat transfer coefficient at internal film (kW/m 2 °C) h 0 The heat transfer coefficient at external film (kW/m 2 °C) h i0 The heat transfer coefficient at internal film brought back to the external surface (kW/ m 2 °C) J hf , J hc Coefficient de transfert pour le fluide froid et chaud, respectivement (kW/m 2 °C) l Tubes length (m) m The cold fluid mass flow (the crude oil) (m 3 /h) m f , m c Débit massique pour le fluide froid et chaud, respectivement (kg/s) m f⊥ , m c⊥ Mass flow for the cold and hot fluid, respectively, concerning the straight section (kg/s) MLDTThe difference logarithmic temperature (°C) n c , n tThe devices and the master keys numbers P e , P s Inlet and outlet pressure of the crude oil respectively (Pascal)Abstract Crude oil fouling in refinery preheat exchangers is a chronic operational problem that compromises energy recovery in these systems. Progress is hindered by the lack of quantitative knowledge of the dynamic effects of fouling on heat exchanger transfer and pressure drops. In subject of this work is an experimental determination of the thermal fouling resistance in the tubular heat exchanger of the crude oil preheats trains installed in an Algiers refinery. By measuring the inlet and outlet temperatures and mass flows of the two fluids, the overall heat transfer coefficient has been determined. Determining the overall heat transfer coefficient for the heat exchanger with clean and fouled surfaces, the fouling resistance was calculated. The results obtained from the two cells of exchangers studies, showed that the fouling resistance increased with time presented an exponential evolution in agreement with the model suggested by Kern and Seaton, with the existence of fluctuation caused by the instability of the flow rate and the impact between the particles. The bad cleaning of the heat exchangers involved the absence of the induction period and caused consequently, high values of the fouling resistance in a relatively short period of time.

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Fouling Characteristics of a Light Australian Crude Oil

Cited by 54 publications

References 1 publication

Effect of operating conditions on crude oil fouling through CFD simulations

Effect of operating conditions on crude oil fouling through CFD simulations

Fouling and its effect on the thermal performance of heat exchanger tubes

The fouling in the tubular heat exchanger of Algiers refinery

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