Together with two-stage turbocharging, advanced engine technology offers considerable advantages in engine emissions and fuel consumption.
In this program, Wärtsilä is focusing on developing advanced engine technology, which, with the turbocharger, is able to reach high performance and grow to be a cost-effective commercial solution for its customers.
ABB Turbo Systems is delivering the turbocharging technology with defined performance in terms of airflow, pressure ratios and efficiency.
With the new engine design, two turbochargers are arranged in series to generate increased air pressure, airflow and a superior turbocharging effect.
This results in a very high efficiency rating of up to 76 per cent.
The increased air pressure, combined with the advanced engine technology, improves the engine output and power density by up to 10 per cent.
At the same time, both fuel consumption and CO2 emissions are reduced.
Additional engine systems or the use of exhaust gas after-treatment can further reduce emissions and a precise combination of fuel consumption levels and reductions in CO2 and NOx emissions can be selected through detailed systems configuration.
Intelligent engine control allows optimum operation of the advanced engine design over the whole load range, and a significant reduction in NOx emissions can be reached.
By compensating for the reduced air density, two-stage turbocharging technology guarantees the engine's operational performance at high altitudes.
The significant reductions in fuel consumption and emissions are the result of extensive joint testing of the two-stage turbocharging system on the Wärtsilä engine.
The tests have taken place at Wärtsilä's test facility in Vaasa, Finland, and the targets for the development programme have been successfully met.
Wärtsilä and ABB Turbo Systems plan to commence a major pilot project with a customer in the near future.
The development work has also met a target of significantly lower lifecycle costs, as well as lower NOx emissions.
The advanced technology for combustion control developed by Wärtsilä will be beneficial to the shipping market, when the market requirements are in place.
Here, in addition to costs, the compactness and cost-effective design are considered to be of importance.