Surface patterning of stainless steel in prevention of fouling in heat transfer equipment

Tiina M. Pääkkönen, Ulla Ojaniemi, Markus Riihimäki, Esa Muurinen, Carey J. Simonson, Riitta L. Keiski

    Research output: Chapter in Book/Report/Conference proceedingChapter or book articleScientificpeer-review

    1 Citation (Scopus)

    Abstract

    Fouling of surfaces is a major challenge in design and operation of many industrial heat transfer equipment. Fouling causes significant energy, material and production losses, which increase the environmental impact and decrease economic profitability of processes. Even small improvements in prevention of fouling would lead to significant savings in a wide range of heat transfer applications. In this study, crystallization fouling of aqueous calcium carbonate solutions on a heated stainless steel surface is used to investigate the prevention of fouling in heat transfer equipment by physical surface modifications. Fouling behaviour of different surface patterns are studied experimentally in a laboratory scale fouling test apparatus. CFD modelling is used to study hydrodynamic and thermal conditions near surfaces with different patterns. In addition, the effect of surface pattern on the removal of particles is studied numerically. Surface patterning is found to affect the hydrodynamic and thermal conditions near the wall, and therefore to change the conditions for fouling layer build-up and removal, when compared to a flat heat transfer surface. The most promising surface pattern includes curved shapes, and it seems to create flow conditions in which improved convective heat transfer decreases the driving force for crystallization fouling. In addition, curved surfaces increase the shear forces at the wall, which prevents adhesion of the foulants to the surface and increases resuspension.
    Original languageEnglish
    Title of host publicationPhysical and Numerical Simulation of Materials Processing VII
    EditorsPentti Karjalainen, David Porter, Seppo Järvenpää
    Pages493-500
    ISBN (Electronic)978-3-03-826109-4
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA3 Part of a book or another research book
    Event7th International Conference on Physical and Numerical Simulation of Materials Processing, ICPNS 2013 - Oulu, Finland
    Duration: 16 Jun 201319 Jun 2013
    Conference number: 7

    Publication series

    SeriesMaterials Science Forum
    Volume762
    ISSN0255-5476

    Conference

    Conference7th International Conference on Physical and Numerical Simulation of Materials Processing, ICPNS 2013
    Abbreviated titleICPNS 2013
    Country/TerritoryFinland
    CityOulu
    Period16/06/1319/06/13

    Keywords

    • fouling
    • heat exchanger
    • patterning

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