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02_febbraio - Porto & diporto

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armamento / porto&<strong>diporto</strong>Utilizzo di combustibilia basso tenore di zolfoAdeguamenti tecnici a bordo delle navi secondoquanto previsto dall’Annesso VI della MARPOLLo scorso 16 Dicembre la“Commissione Navale pressol’Ordine degli Ingegneri di Napoli”ha organizzato in collaborazionecon la Mistral s.r.l. un interessanteincontro sulle nuove regolamentazioniriguardanti l’uso di combustibili abasso contenuto di zolfo.Hanno partecipato tre delle principaliaziende rappresentate dallaMistral s.r.l.: Aalborg Industries, A-meron B.V. e Novenco AS. Dopo l’introduzionedegli ingegneri Luigi Vinci(Presidente Ordine degli Ingegneri diNapoli), Marco Starita (Coordinato-re Commissione Navale di Napoli) eFabio Spetrini (Segretario CommissioneNavale di Napoli) è stato chiaroche uno degli argomenti più rilevantiin agenda è la conformità alla direttivaeuropea denominata “EU Directive2005/33/EC” effettiva dal primoGennaio 2010.La direttiva in questione indica chequando una nave si trova in porto oall’ancora, per essere in accordo conessa, deve utilizzare combustibili conun contenuto di zolfo non superioreallo 0.1% (di grado DMX o DMAcome dalla ISO 8217).Gran parte degli impianti di bordosono progettati per utilizzare combustibilicon alti tenori di zolfo denominatiheavy fuel oil, quindi questocambio di utilizzo verso combustibilia basso contenuto di zolfo (low sulphurfuel oil) crea alcune situazioniche non possono essere trascurate.Questi combustibili infatti hannopunti di fiamma più bassi, valori calorificipiù elevati e proprietà lubrificantiinferiori se comparati con i combustibiliper i quali i molti macchinari sonostati progettati.Mr. John Karlsen, Aalborg Industri-Use of low sulpher fuelsLast 16th December 2010 the Naval Commitee of Naples“Ordine degli Ingegneri”, organized an interestingmeeting with Mistral s.r.l. collaboration regardingthe New Regulations on Low Sulphur Fuel. Three ofmain Mistral s.r.l. principals attended the meeting:Aalborg Industries, Ameron B.V. and Novenco AS.After a brief introduction of Ing. Luigi Vinci (Presidentof The Engineering Council of Naples), Ing. MarcoStarita (Coordinator of Naval Committee of Naples)and Ing. Fabio Spetrini (Secretary and member of theNaval Committee of Naples), it was clear that one ofthe hottest issues on the agenda was the EU Directive2005/33/EC compliance which came into effect on 01January 2010.The Directive specifies that fuel with a maximum sulphurcontent of 0.1% can be used when the vessel isin port or at anchorage, and in order to be in compliancewith, low sulphur gas oil (of DMX or DMA gradeaccording to ISO 8217) must be used. As currentplants are designed mainly for heavy fuel oil operation,this change in fuels will constitute an operationalsafety risk and some operational issues have to beconsidered; particularly the low sulphur fuel has lowerflash point, higher calorific value and lower lubricationcharacteristics when compared to the fuels thatplants were originally designed for.Mr. John Karlsen (Aalborg Industries Customer ManagementManager) showed the upgrade kits that AalborgIndustries has developed to ensure safe plantsoperation remaining in compliance with classificationsociety requirements using fuels with a low sulphurcontent.Obviously with the use of distillate fuels, the fuelcosts will increase.One of targets already achieved by Aalborg, developingWaste Heat Recovery technologies, has been designingan Exhaust Gas Boiler after an Aux. Engine,which is able to give the best performance and economicalresult with a pay-back extremely fast (lessthan one year in more cases).Afterwards an interesting LSFO Updating Case Storyof an Aframax Tanker, equipped with 2 boilers OL of 35t/h of steam plus one exhaust gas boiler steam atomizingburner (KBSD 2650), has been well explained byMr. Kewin Høyrup, Sales Engineer After Sales Repair.In this case LSFO Solution has been to double the fuel26 - <strong>febbraio</strong> 2011

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