Browsing SINTEF Open by Author "Birkevold, Jens"
Now showing items 1-6 of 6
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Current induced drag forces on cultivated sugar kelp
Endresen, Per Christian; Norvik, Carina; Kristiansen, David; Birkevold, Jens; Volent, Zsolt (Chapter, 2019-06)To obtain more knowledge of current induced drag forces on sugar kelp, towing tests with ropes containing cultivated sugar kelp was conducted. As freshwater may damage the kelp and cause changes in its mechanical response, ... -
Drag Forces and deformation of aquaculture cages – full-scale towing tests in the field
Gansel, Lars Christian; Oppedal, Frode; Birkevold, Jens; Tuene, Stig Atle (Journal article; Peer reviewed, 2018-02-23)Fish cages can experience strong loads due to hydrodynamic forces in the sea. Numerical models are often used to estimate drag forces on net cages, and the development and validation of such models is mostly based on ... -
Effect of ultrasonic cavitation on small and large organisms for water disinfection during fish transport
Svendsen, Eirik; Dahle, Stine Veronica Wiborg; Hagemann, Andreas; Birkevold, Jens; Delacroix, Stephanie; Andersen, Aage Bjørn (Journal article; Peer reviewed, 2017-12-08)Motivated by the need for additional tools to disinfect discharge water from well boats, and to prevent distribution of salmon lice, the effect of ultrasonic cavitation on the planktonic stages of the salmon louse, nauplii ... -
Experimental study of installation procedure and volume estimation of tarpaulin for chemical treatment of fish in floating cages
Volent, Zsolt; Birkevold, Jens; Stahl, Annette; Lien, Andreas Myskja; Sunde, Leif Magne; Lader, Pål Furset (Journal article; Peer reviewed, 2017)In the salmon industry chemical delousing is done by enclosing the cage in a tarpaulin, and then mixing the chemical agent in the enclosed water volume. Correct dosage is important to obtain the wanted effect, and in order ... -
Modellforsøk med dukbasert avlusing Beskrivelse av gjennomføringen av modellforsøk i Hirtshals - Foreløpig rapport
Volent, Zsolt; Birkevold, Jens; Stahl, Annette (SINTEF Fiskeri og havbruk;A26406, Research report, 2014-10-23)Det er avgjørende å ha god kontroll på volumet under en avlusing, for å kunne beregne innblanding av lusemidler, slik at en oppnår ønsket behandlingskonsentrasjon. En for høy konsentrasjon kan skade fisken, og for lav ... -
Modellforsøk med dukbasert avlusing. Beskrivelse av gjennomføringen og resultater fra modellforsøk i Hirtshals, juni 2014 for FHF
Volent, Zsolt; Birkevold, Jens; Stahl, Annette; Lien, Andreas Myskja; Sunde, Leif Magne (SINTEF Fiskeri og Havbruk reports;A26728, Research report, 2014-10-23)Målet for prosjektet var å kartlegge og demonstrere i modellskala hvordan de forskjellige dukfasonger oppførte seg ved utsett ved forskjellige strømhastigheter, og om det var mulig å fylle dukene 100 % ved bruk av forskjellige ...