A model for the prediction of thermal resistance of calcium sulfate crystallization fouling in a liquid–solid fluidized bed heat exchanger with cylindrical particles

Maddahi, Mohammad Hossein; Hatamipour, Mohammad Sadegh; Jamialahmadi, M.

doi:10.1016/j.ijthermalsci.2019.106017

Cited by 12 publications

(2 citation statements)

References 26 publications

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“…Heat transfer coefficient was significantly increased in this type of HE, while fouling was noticeably reduced due to the particle-wall collisions. The group also proposed a model and validated it through the obtained experimental data [104]. Such HEs were also studied in eutectic freeze crystallization [105,106].…”

Section: Fouling Inhibition and Cleaningmentioning

confidence: 97%

A Review of Crystallization Fouling in Heat Exchangers

et al. 2021

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A vast majority of heat exchangers suffer from unwanted deposition of material on the surface, which severely inhibits their performance and thus marks one of the biggest challenges in heat transfer. Despite numerous scientific investigations, prediction and prevention of fouling remain unresolved issues in process engineering and are responsible for large economic losses and environmental damage. This review article focuses specifically on crystallization fouling, providing a comprehensive overview of the state-of-the-art of fouling in heat exchangers. The fundamentals of the topic are discussed, as the term fouling resistance is introduced along with distinct fouling behaviour, observed in laboratory and industrial environments. Insight into subsequent phases of the fouling process is provided, along with the accompanying microscale events. Furthermore, the effects of fluid composition, temperature, flow velocity, surface condition, nucleate boiling and composite fouling are comprehensively discussed. Fouling modelling is systematically reviewed, from the early work of Kern and Seaton to recently used artificial neural networks and computational fluid dynamics. Finally, the most common fouling mitigation approaches are presented, including design considerations and various on-line strategies, as well as off-line cleaning. According to our review, several topics require further study, such as the initial stage of crystal formation, the effects of ageing, the interplay of two or more fouling mechanisms and the underlying phenomena of several mitigation strategies.

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Section: Fouling Inhibition and Cleaningmentioning

confidence: 97%

A Review of Crystallization Fouling in Heat Exchangers

et al. 2021

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“…Maddahi et al [43] T A B L E 2 Information and composition of natural gas. [21] Natural T A B L E 3 Properties of natural gas.…”

Section: Foulingmentioning

confidence: 99%

The effect of heat transfer characteristics of macromolecule fouling on heat exchanger surface: A dynamic simulation study

et al. 2023

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At the city gate gas pressure reduction stations (CGSs), to prevent natural gas from forming a hydrate in the throttle valve, the natural gas is heated by the heater before reaching the pressure relief valve. Heat exchangers are an essential component of industrial processes that contribute significantly to total system energy. Since the element impacting heat exchanger performance is the fouling process, all fouling processes and models were dynamically simulated in this study. Through coding in the C++ language and simultaneous use of fluent functions, or, in other words, user‐defined function (UDF), fouling‐related models were defined for this software. The dynamic simulation was performed, and parameters such as fouling strength and layer thickness were calculated. The effects of changing operating conditions, such as gas inlet velocity, surface temperature, and fouling species concentration on fouling growth, were also evaluated. As the concentration of fouling species increased, the fouling rate also increased. The amount of supersaturation and fouling rate increased as the surface temperature increased. Due to the operational limitations of the system, to reduce the fouling rate, the gas inlet velocity should be as high as possible, and the fluid inlet temperature, surface temperature, and concentration of fouling species should be as low as possible. In this study, the required time to reach the efficiency of 70% of the heat exchanger was calculated using the modelling of this chamber, which was equivalent to 190 days. Additionally, the critical thickness of the fouling layer at this time was 3.5 cm.

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Basic Concepts of Fouling in Heat Transfer System

Varnaseri,

Peyghambarzadeh

2024

Scale Formation in Heat Exchangers

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A model for the prediction of thermal resistance of calcium sulfate crystallization fouling in a liquid–solid fluidized bed heat exchanger with cylindrical particles

Cited by 12 publications

References 26 publications

A Review of Crystallization Fouling in Heat Exchangers

A Review of Crystallization Fouling in Heat Exchangers

The effect of heat transfer characteristics of macromolecule fouling on heat exchanger surface: A dynamic simulation study

Basic Concepts of Fouling in Heat Transfer System

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