Modern Fleet Successfully Fishes for Efficient Propulsion Solution

State-of-the-art, Spanish tuna vessel opts for extremely fuel-efficient propulsion package.

Based  in  Spain,  the  PEVASA  Group  recently  ordered  a  complete  propulsion system from MAN Diesel & Turbo for a new tuna vessel. The system is unique in that  it  comprises  a  package  of  three  high-efficiency  products,  including  a modern,   medium-speed   MAN  8L32/44CR   engine   with   common-rail   (CR) technology, a Renk RSVL-950 gear unit, and an innovative MAN Alpha VBS1100 CP  propeller  with  Kappel  propeller  blade  designs  and  rudder  bulb.  This combination increases the propulsion system’s efficiency by up to at least 9%, thereby helping to decrease costs, fuel consumption, and exhaust emissions.  

PEVASA has a tradition for placing value on new technology: in 2009, the company purchased  a  structurally  identical  CR-engine  that  completed  the  upgrade  of  its  six-boat tuna fishing fleet. It was thus one of the first customers to opt for MAN Diesel & Turbo’s CR technology, which controls the engine’s fuel-injection pressure and timing to reduce overall fuel consumption.  

The  Kappel  propeller  adds  another  enhancement  to  the  overall  package  with  its special design that reduces the power-consuming vortices formed at the propeller tip region. MAN Diesel & Turbo acquired Kappel Propeller Designs, including all rights, in early 2012 and is currently the sole provider of this cutting-edge technology.  

Ship model test 

The new updated propulsion configuration was recently model tested at CEHIPAR in Spain  and  the  ø4500  Kappel  propeller  with  MAN  Diesel  &  Turbo’s  CFD-optimised rudder  bulb  fitted  on  a  Becker  twisted  rudder  offered  a  9.2%  propulsion  efficiency improvement at 18.5 knots compared to the vessel configuration previously tested.    

Follow-on orders 

“This propulsion package is the most energy-efficient solution that we currently offer,” Said MAN Diesel & Turbo’s Frederik Carstens, Head of MSO and Sales Manager of the Medium Speed Business Unit. He believes that PEVASA’s order reveals a trend among  customers  in  the  marine  segment  who  are  increasingly  interested  in  fuel efficiency.  Another  new  order  that  supports  this  assessment  is  that  from  Italian shipyard,  Visentini,  which  has  ordered a  complete  package  consisting  of  two  new 9L32/44CR  engines  with  CR  technology,  smooth-running  Renk  gearboxes,  and innovative MAN Alpha propellers. 

Images: MAN Diesel&Turbo, PEVASA SA, Renk Gear 



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