Recent Developments in the Large Engine Industry to Reduce Fuel Consumption and Emissions

Authors

David Gagliardi, Ricardo Deutschland GmbH, Lars M. Nerheim, Ricardo UK

Year

2007

Summary

Also for the Large Engine industry (marine and stationary engines > 200mm bore) stricter emission limits have been introduced during the past decade and which normally is contradictory to lower fuel consumption. However, because of their big total powers and high annual operating hours, any fuel consumption increase is very sensitive to this industry and hence much development has gone into finding the best compromise for this. Modifications to the basic engine design concepts like the introduction of more advanced thermodynamic cycles, new and advanced fuel injection and turbocharging systems and not the least introduction of electronic control systems have been adapted in most engine types and these developments will be outlined in some detail. Waste heat recovery has always been part of a large engine installation and new developments have taken place in this field as well and which further reduces total fuel burn. Also, use of alternative fuel types like natural gas, either in gaseous or liquid form as LNG, has gained significant importance in the large engine world both for stationary and marine applications. This brings about further emission reductions including significant reductions of CO2 / kWh. Some of these developments will also be described in the paper.

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