On the opportunity of improving propulsion system efficiency for Italian fishing vessels (Contributo in atti di convegno)

Type
Label
  • On the opportunity of improving propulsion system efficiency for Italian fishing vessels (Contributo in atti di convegno) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Alternative label
  • Emilio Notti, Antonello Sala (2012)
    On the opportunity of improving propulsion system efficiency for Italian fishing vessels
    in Second International Symposium on fishing vessel energy efficiency, Vigo (Spain), 22-24 Maggio 2012
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Emilio Notti, Antonello Sala (literal)
Pagina inizio
  • 117 (literal)
Pagina fine
  • 122 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Second International Symposium on fishing vessel energy efficiency (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Note
  • Google Scholar (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ISMAR, U.O.S. Ancona (literal)
Titolo
  • On the opportunity of improving propulsion system efficiency for Italian fishing vessels (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-84-615-8943-2 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autoriVolume
  • Adrian Sarasquete (literal)
Abstract
  • In this paper a review of some improvements is proposed for trawlers propulsion systems. Basically, fishing activity is characterized by two different operative conditions: sailing and trawling. The technical solutions herein proposed can be adopted in new or in existing vessels. The propulsion system efficiency is mainly influenced by propeller and main engine efficiency. Engine and propeller must be coordinated through the reduction gear in such a way that optimum conditions are reached both for sailing and trawling phases. Typically, a free fixed pitch propeller is used for propulsion system in Italian fishing vessels. For a given propeller thrust and operating condition, a two-speed reduction gear box can be adopted to perform each fishing phase without overloading the main engine and saving fuel. Bollard pull tests demonstrated that using a ducted propeller, thrust is increased up to 25%, if compared with a conventional propeller with same diameter and pitch. Main engine efficiency can be improved using a new hybrid diesel-electric propulsion system. In the propulsion system herein proposed, the overall power required by the vessel can be subdivided in multiple power units, each one obtained coupling a diesel engine with a permanent magnet brushless electric generator, while the propeller is coupled with an electric motor. Through an electronic management system, it is possible to maintain power units at different operating points and guarantee the minimum overall fuel consumption. Tests demonstrated a fuel saving up to 15%. One characteristic of this abovementioned improvements is that they could be applied contemporary in the same fishing vessel, adding each benefit in propulsion system efficiency. (literal)
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