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

T.M. Pääkkönen, Ulla Ojaniemi, M. Riihimäki, E. Muurinen, C.J. Simonson, R.L. Keiski

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

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 publicationMaterials Science Forum
Subtitle of host publicationPhysical and Numerical Simulation of Materials Processing VII
Pages493-500
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
CountryFinland
CityOulu
Period16/06/1319/06/13

Fingerprint

Fouling
Stainless steel
Heat transfer
Hydrodynamics
Crystallization
Calcium carbonate
Environmental impact
Surface treatment
Profitability
Computational fluid dynamics
Adhesion
Economics

Keywords

  • fouling
  • heat exchanger
  • patterning

Cite this

Pääkkönen, T. M., Ojaniemi, U., Riihimäki, M., Muurinen, E., Simonson, C. J., & Keiski, R. L. (2013). Surface patterning of stainless steel in prevention of fouling in heat transfer equipment. In Materials Science Forum: Physical and Numerical Simulation of Materials Processing VII (pp. 493-500). Materials Science Forum, Vol.. 762 https://doi.org/10.4028/www.scientific.net/MSF.762.493
Pääkkönen, T.M. ; Ojaniemi, Ulla ; Riihimäki, M. ; Muurinen, E. ; Simonson, C.J. ; Keiski, R.L. / Surface patterning of stainless steel in prevention of fouling in heat transfer equipment. Materials Science Forum: Physical and Numerical Simulation of Materials Processing VII. 2013. pp. 493-500 (Materials Science Forum, Vol. 762).
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Pääkkönen, TM, Ojaniemi, U, Riihimäki, M, Muurinen, E, Simonson, CJ & Keiski, RL 2013, Surface patterning of stainless steel in prevention of fouling in heat transfer equipment. in Materials Science Forum: Physical and Numerical Simulation of Materials Processing VII. Materials Science Forum, vol. 762, pp. 493-500, 7th International Conference on Physical and Numerical Simulation of Materials Processing, ICPNS 2013, Oulu, Finland, 16/06/13. https://doi.org/10.4028/www.scientific.net/MSF.762.493

Surface patterning of stainless steel in prevention of fouling in heat transfer equipment. / Pääkkönen, T.M.; Ojaniemi, Ulla; Riihimäki, M.; Muurinen, E.; Simonson, C.J.; Keiski, R.L.

Materials Science Forum: Physical and Numerical Simulation of Materials Processing VII. 2013. p. 493-500 (Materials Science Forum, Vol. 762).

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

TY - CHAP

T1 - Surface patterning of stainless steel in prevention of fouling in heat transfer equipment

AU - Pääkkönen, T.M.

AU - Ojaniemi, Ulla

AU - Riihimäki, M.

AU - Muurinen, E.

AU - Simonson, C.J.

AU - Keiski, R.L.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

KW - fouling

KW - heat exchanger

KW - patterning

U2 - 10.4028/www.scientific.net/MSF.762.493

DO - 10.4028/www.scientific.net/MSF.762.493

M3 - Chapter or book article

T3 - Materials Science Forum

SP - 493

EP - 500

BT - Materials Science Forum

ER -

Pääkkönen TM, Ojaniemi U, Riihimäki M, Muurinen E, Simonson CJ, Keiski RL. Surface patterning of stainless steel in prevention of fouling in heat transfer equipment. In Materials Science Forum: Physical and Numerical Simulation of Materials Processing VII. 2013. p. 493-500. (Materials Science Forum, Vol. 762). https://doi.org/10.4028/www.scientific.net/MSF.762.493