Composite fouling characteristics of CaCO3 and CaSO4 in plate heat exchangers at various operating and geometric conditions

Song, Kang Sub; Lim, Jin‐Ho; Yun, Sungho; Kim, Dongwoo; Kim, Yong Chan

doi:10.1016/j.ijheatmasstransfer.2019.03.032

Cited by 43 publications

(14 citation statements)

References 21 publications

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“…Other research groups observed that CaCO 3 exhibited more prominent effects on fouling than CaSO 4 due to its stronger adhesion. When both substances were dissolved in water together, the exhibited characteristics of the deposit were closer to those of CaCO 3 [27]. Helalizadeh et al [28] performed similar experiments with CaCO 3 and CaSO 4 on heat transfer surfaces and subsequently developed a mechanistic model [29].…”

Section: Solution Concentration and Compositionmentioning

confidence: 99%

“…Song et al [27] compared the influence of the discussed parameters on fouling characteristics of CaCO 3 and CaSO 4 in a plate heat exchanger, where the effects of foulant concentration, flow velocity, temperature and chevron angle were studied. Based on sensitivity analysis, flow velocity and temperature were determined to be the dominant control factors, while the influence of concentration and chevron angle was found to be much smaller in comparison.…”

Section: Flow Velocitymentioning

confidence: 99%

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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: Solution Concentration and Compositionmentioning

confidence: 99%

Section: Flow Velocitymentioning

confidence: 99%

A Review of Crystallization Fouling in Heat Exchangers

et al. 2021

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“…It can be observed that salt precipitation, particularly CaCO 3 a prevalent scale in cooling water, has a significant impact on fouling-model development. Following that, several other investigations focused on the same salt solutions and utilized models to identify fouling behavior [17].…”

Section: Literature Surveymentioning

confidence: 99%

CFD analysis of Gypsum crystallization fouling in 2D plate heat exchangers

2022

IJATEE

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The most common equipment used in processes industries are heat exchangers. These devices are used for exchanging heat between two process fluid streams. The heat exchanger is an essential modern tool in the process industry. The objectives of heat exchangers in the process industries are to meet boiling, condensation, bulk heating, and cooling or evaporation requirements.*Author for correspondence Heat exchangers' performance and efficiency can be measured by measuring the amount of heat transferred using the minimum area of heat transfer and the pressure drop. The main problem faced during the working of heat exchangers is fouling, which results in their poor efficiency. Fouling is the deposition and buildup of undesired elements in process fluids, such as scale, suspended particles, insoluble salts, and so on, on the interior or external surfaces of processing equipment such as boilers and heat exchangers. The most significant consequence of fouling is the reduction in the thermal efficiency of a

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“…Surface deposition causes a reduction in heat transfer efficiency, increasing the power consumption and blockage of flowlines in domestic devices subjected to fouling [2][3][4][5]. The scaling process in these devices is distinguished by some unique features including the heating to water boiling point, steaming and composite fouling layer of various elements [6].…”

Section: Introductionmentioning

confidence: 99%