The 50-litre platform has been
used in traditional fixed speed diesel electric applications, as well as
traditional propulsion and power generation, since its launch in 2006.
"Cummins will play a
critical role in the advancement of this more efficient technology, supplying
engines to system integrators for packaging into complete variable speed diesel
electric packages," according to Waldemar Marchetti Director of Strategic
Growth – Offshore. "We will continue to expand our product line, skills
and capabilities, working with partner suppliers to design customised packages
utilising the latest technology."
Cummins says it is taking
diesel electric technology to the next level with the introduction of optimised
ratings for variable speed diesel electric (VSDE) applications. The company
says that VSDE technology is ideal for low load applications, such as fishing
vessels, offshore support vessels, ferry boats, and passenger vessels.
As with a traditional fixed
speed diesel electric gensets, a variable speed diesel electric genset features
an engine, base rails, system controls and alternator. But unlike traditional
diesel electric, VSDE utilises the DC component to allow the engines to operate
at variable speed, eliminating the need for paralleling gensets. Early reports
published by system integrators show significantly reduced fuel consumption,
reduced CO2 emissions and lower system weight for the complete VSDE package
compared to fixed speed diesel electric applications; operators should also
expect reduced maintenance costs and increased engine durability.
While Cummins' existing ratings
can be utilised in VSDE applications, the new 2183 hp at 1800 RPM QSK50 rating
was optimised specifically for variable speed applications, by providing
maximum fuel efficiency at all operating points. Further efficiency gains can
be achieved via the power management system. Over the coming months, the
company will offer additional ratings optimised for VSDE. At launch, all
ratings will meet IMO Tier II emissions at the ISO E2 and E3 test cycles.