University of Oulu

Riihimäki, M.; Pääkkönen, T. M.; Guillot, J.; Lecoq, E.; Muurinen, E.; Simonson, C. J.; Keiski, R. L. (2017) Crystallization fouling on modified heat exchanger surfaces. In Proceedings - Heat Exchanger Fouling and Cleaning XII - 2017. College Station, TX: Heat Transfer Reserch Inc., pp. 155-162.

Crystallization fouling on modified heat exchanger surfaces

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Author: Riihimäki, M.1; Pääkkönen, T. M.1; Guillot, J.2;
Organizations: 1University of Oulu, Faculty of Technology, Environmental and Chemical Engineering
2Luxembourg Institute of Science and Technology, Materials Research and Technology Department
3University of Saskatchewan, Department of Mechanical Engineering
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
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Language: English
Published: Heat Transfer Research, 2017
Publish Date: 2018-04-09


Fouling of heat transfer surfaces is a major challenge in design and operation of the process equipment. Fouling decreases economic profitability of processes as well as increases the environmental impact of production. Significant savings could be achieved with even rather small improvements in prevention of fouling of heat transfer equipment. One of the options to prevent fouling on heat transfer surfaces is to modify the heat transfer surface.

This study investigates the effects of different surface modification methods to prevent fouling on a heat transfer surface by coating, grinding, polishing, and patterning. Fouling behavior of the surface modifications are studied in a laboratory scale fouling test set-up using supersaturated calcium carbonate solution as a test fluid.

Surface modifications are found to have a significant effect on the fouling induction time when compared to the unmodified stainless steel. The most significant increase in the induction time is obtained by the organosilicon thin films deposited on the stainless steel (AISI 316L 2B) having up to 7.5 times longer induction time of the unmodified reference material. Patterning increases the induction time up to 2.5 times and grinding up to 1.7 times. The mechanism in the fouling reduction seems to be related to chemical functionalization, hydrodynamic effects, and surface morphology.

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ISBN: 978-0-9984188-0-3
Host publication: Proceedings of the 12th International Conference on Heat Exchanger Fouling and Cleaning - 2017
Host publication editor: Zettler, Hans U.
Type of Publication: A4 Article in conference proceedings
Field of Science: 215 Chemical engineering
Copyright information: © 2018 HTRI. Published in this repository with the kind permission of the publisher.