Making hard choices for materials that last the distance

DESMI A/S
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DESMI has gained a solid reputation over the years for selecting exactly the right materials for its products to withstand the damaging effects of harsh environments.

DESMI has gained a solid reputation over the years for selecting exactly the right materials for its products to withstand the damaging effects of harsh environments.

DESMI Ocean Guard, part of the DESMI group of companies, provides innovative solutions that overcome the challenges of treating ballast water for vessels sailing from one region of the world to another. In 2016, work began to develop DESMI CompactClean, a UV-based ballast water management system that would require very little space, yet deliver high flow rates. And the careful choice of materials for the new system was to be a crucial part of the design journey.

DESMI Ocean Guard technical manager, Mark Kalhøj Andersen, picks up the story: “We actually started from scratch again, working with three models: A computational fluid dynamics (CFD) model, a particle model and a light distribution model that enabled us to spread the UV light in an optimal way throughout the water being processed. This would enable us to treat organisms in the water not just so they would be damaged to the point where they were unable to reproduce, but to actually be killed outright far more quickly than other solutions in the marketplace. We also wanted the system to be extremely compact, produced in a skid-mounted version with everything on board, including the treatment system, pumps and cleaning-in-place module.”

When designing a system of this type, within a very short development timeline and with a long approval process ahead, diligently performing desk-based analysis is key. That requires the R&D team to test different approaches and prototype designs via a combination of reviewing available literature and computational modelling and experience. This is an area where DESMI’s technical teams excel, increasing the probability of arriving at a successful design, and keeping development costs to a minimum.

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Making hard choices for materials that last the distance

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