Fouling Phenomenon and Its Effect on Heat Exchanger: A Review

Ajayi, Oluseyi O.; Ogbonnaya, Stephen

doi:10.5098/hmt.9.31

Cited by 15 publications

(8 citation statements)

References 26 publications

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“…Thermal efficiency losses vary from 4.9% to 10.1%, mainly caused by progressive sulphur deposition around the heat transfer surfaces due to gas pressure and temperature drops [26][27]. The buildup carried over by the process stream grows over time, creating insulation layers that reduces the overall heat transfer coefficients between 7.5 and 20.8 W/(m 2 • K).…”

Section: Evaluation Of the Heat Exchangers Under Current Operating Comentioning

confidence: 99%

Improvements to the Heat Transfer Process on a Hydrogen Sulphide Gas Coolers System

Escalona¹,

Góngora-Leyva²

2019

IJHT

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To operate the hydrogen sulphide gas coolers outside design parameters impacts the production process, because the resulting increased gas outlet temperature and lower sulphur separation effectiveness, which favors pipe plugging and damage to downstream compressors. A procedure was formulated for thermal analysis of jacketed shell-and-tube heat exchangers, in order to examine the object of study and propose improvements to existing facilities. Beyond conventional analysis, this work included the experimental method as well as mathematical modeling, that were not interrelated in previous researches. A cooling system that meets current technological requirements was identified, consisting of two sets of four improved coolers, where each set operates at a maximum hydrogen sulphide flowrate of 5.565 kg/s and 7.500 kg/s of water feeding each exchanger, thus reaching a gas cooling rate below 313 K.

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Section: Evaluation Of the Heat Exchangers Under Current Operating Comentioning

confidence: 99%

Improvements to the Heat Transfer Process on a Hydrogen Sulphide Gas Coolers System

Escalona¹,

Góngora-Leyva²

2019

IJHT

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“…Fouling has a great effect on heat exchanger performance. There are different types of fouling depending on the purpose of the heat exchanger and what is its application (Ajayi, Ogbonnaya, & Transfer, 2017). Increasing heat exchanger performance usually means transferring more duty or operating the exchanger at a closer temperature approach.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Performance Analysis for Different Types of Heat Exchangers

Abdel-Kawi

Elbakhshawangy

Abdelmaksoud

2022

JMCIE

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Heat exchangers are devices whose primary responsibility is to transfer heat, typically from one fluid to another. In such applications, the heat exchangers can be parallel flow, crossflow, or counter flow. An essential part of any heat exchanger analysis is the determination of the effectiveness of the heat exchanger. In the present work, three different types of heat exchangers are investigated. Numerical and experimental performance analyses are applied. The main objective of the present work is to compare the effectiveness of each heat exchanger at different conditions. Six experimental investigations for Plate, shell & tube, and fluidized bed heat exchangers are executed. All experimental tests are reached to steady-state conditions. The results show that the counter flow plate heat exchanger has an effectiveness of 90% compared with the parallel flow of 60% effectiveness for working experimental conditions. Also, the fouling effect in decreasing heat transfer is cleared. In the present work, fouling decreases effectiveness from about 18% to about 4%. In addition, the effectiveness of the fluidized bed heat exchanger depends on the material used for the bed. Finally, the overall heat transfer coefficient is obtained and compared for all experimental tests, and it is directly proportional to the effectiveness of the heat exchanger. The FEHT program is used to get the temperature distribution in all types of present work heat exchangers.

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“…6 Hence, it is necessary to consider the effect of fouling and its impact on the transient behavior to ensure optimal operations of HE. 7 The severity of fouling in HE can be quantified using fouling resistance (FR). 8 Fouling is a complicated process that is influenced by several dynamic factors like fluid velocity, flow arrangement, working fluids temperature, type of the HE surface, mechanism of heat transfer, nature of the fouled layer, working fluid concentration, HE design, and surface temperatures.…”

Section: Introductionmentioning

confidence: 99%

Iterative quality weighted interpolation for LPV‐MPC control of industrial heat exchanger under varying fouling conditions

Jayalalitha

2022

Asia-Pacific J Chem Eng

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Fouling is an inevitable phenomenon that tends to change the dynamics of the heat exchanger (HE). An accurate prediction model describing these varying HE dynamics is demanded to implement model predictive control (MPC), which has been addressed in this work. A novel iterative quality weighted interpolation (IQWI) technique is proposed to determine the prediction model from the linear parametric varying (LPV) model. It uses a set of linear state‐space (SS) models, which have been identified from the input–output data of the industrial HE under various fouling conditions. The quality of the identified models is assessed using a fuzzy inference system (FIS) based on fit percentage and data quality. IQWI technique uses incremental thresholds for the model quality to iteratively generate interpolation curves. Each interpolation curve is capable of estimating the model parameters, which are fused using the distance weighted method to determine the optimal model parameters. The proposed technique is capable of improving the model accuracy by 24.43%. The use of a fouling‐based prediction model equips the MPC with accurate knowledge of HE dynamics, which enables it to provide efficient control. Experimental analysis under five different fouling conditions and comparative analysis with the existing controller indicates the efficiency of the proposed method.

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Fouling Phenomenon and Its Effect on Heat Exchanger: A Review

Cited by 15 publications

References 26 publications

Improvements to the Heat Transfer Process on a Hydrogen Sulphide Gas Coolers System

Improvements to the Heat Transfer Process on a Hydrogen Sulphide Gas Coolers System

Numerical and Experimental Performance Analysis for Different Types of Heat Exchangers

Iterative quality weighted interpolation for LPV‐MPC control of industrial heat exchanger under varying fouling conditions

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