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7352 |
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Wednesday, May 04, 2022, Hall -2.32/33 10:50 AM Pre- & Post-Treatment |
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Thermally sprayed icephobic surfaces to reduce icing problems in woodchip containers |
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Heli Koivuluoto* / Tampere University, Finland Julien Walser / NOVIA University of Applied Sciences, Finland Jari Oja/ Tampere University, Finland Katrin Asplund/ NOVIA University of Applied Sciences, Finland Andreas Willfors/ NOVIA University of Applied Sciences, Finland |
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Icing causes problems in different industrial applications such as transportation, energy, and forest industries. For example, woodchip containers face severe problems in the wintertime. When trees are chipped on the lumbering site, the transportation of the woodchips is needed. In cold conditions, woodchips are freezing and adhering to the metal walls of containers, which in turn complicates their unloading process. One solution to tackle this icing problem of the woodchips is the use of thermally sprayed icephobic surfaces on the walls of the containers. Flame sprayed polymeric coatings have shown their potential to decrease ice adhesion on surfaces. In addition to this, thermally sprayed slippery liquid infused porous surfaces (TS-SLIPS) have very low ice adhesion and therefore, their icing performance in the woodchip application is investigated. The aim of this study is to investigate several materials, coatings, and surface films as candidates to decrease icing problems in the woodchip containers. Ice removal from the wall structure as well as ice adhesion strength are evaluated in the ice laboratory by using shear-type ice removal testing and centrifugal ice adhesion testing, respectively. The most promising results were achieved with TS-SLIPS surface design, which had fast ice removal and low ice adhesion. |