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VTA-aggregatet: En undersökning av driftegenskaper och funktion vid slowsteaming.
Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
2011 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Turboaggregat med variabel geometri har länge funnit hos automobiler, men det dröjde ända tills 2008 innan det första dök upp på ett fartyg. Syftet med denna undersökning har varit att kontrollera om de fördelar som Man B&W hävdar att VTA-aggregatet skall ha stämmer, samt att undersöka om VTA-aggregatet kan lösa de problem som uppkommer i och med att man kör med reducerad fart, s.k. slowsteaming. För att undersöka detta har jag bedrivit litteraturstudie, med insamling av data mestadels från Internet.

Resultatet av undersökningen visar på att ett VTA-aggregat kan minska bränsleförbrukningen och vissa emissioner vid reducerad fart jämfört med en konventionell turbo av samma storlek. Den minskade bränsleförbrukningen leder i sin tur till ekonomiska vinster. Ett VTA-aggregat lindrar också vissa av de problem som uppkommer vid slowsteaming.

Med de uppgifter som kommit fram anser jag att VTA-aggregatet är praktiskt för fartyg som tillämpar slowsteaming, men att använda en VTA-turbo på ett nybyggt fartyg för att man ska slowsteama finner jag vara ett slöseri med kapital och kapacitet.

Abstract [en]

Turbocharger with variable geometry has for a longtime been used in automobiles, but it was not until 2008 that the first one appeared on a ship. The purpose of this study is to control if the benefits of the VTA-turbo claimed by Man B&W are accurate and to examine if the VTA turbo does have the ability to solve the problems occurring when the ship is moving with reduced speed, so called slowsteaming. To investigate this I have conducted a literature study, with collection of data mostly from the Internet.

The result of the study shows that a VTA turbo can reduce fuel consumption and emissions at reduced speed compared with a conventional turbo of the same size. The reduction in fuel consumption leads to economic gains. A VTA turbo also eases some of the problems that arise from slowsteaming.

With the information received, I believe that a VTA turbo is convenient for those ships that use slow steaming. However, to use a VTA turbo on newly built ships in order to slow steam, I consider being a waste of capital and capacity.

Place, publisher, year, edition, pages
2011. , 29 p.
Keyword [en]
VTA-turbo, emissions, fuel reduction, slowsteaming
Keyword [sv]
VTA-turbo, emissioner, bränsleförbrukning, slowsteaming
Identifiers
URN: urn:nbn:se:lnu:diva-11416OAI: oai:DiVA.org:lnu-11416DiVA: diva2:410637
Subject / course
Chief Engineer
Educational program
Marine Engineering Programme (3 years), 180 credits
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-05-24 Created: 2011-04-14 Last updated: 2011-05-24Bibliographically approved

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Lundin, Edward
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