Various configurations have already been tested and are now available
Inland waterway vessels have a variety of engine configurations on board, this being partly determined by the size of the ship, the route and the engine’s part and full load period. LNG power offers a number of engine configurations for inland waterway vessels.
Dual-Fuel 99% LNG and 1% Diesel
This LNG Dual-Fuel system has already been in use for more than 10 years in coastal and ocean shipping. The engines are now also supplied for inland shipping. The LNG Dual-Fuel engines are specifically designed as Dual-Fuel systems so only a limited quantity of pilot fuel is required. The Dual-Fuel engine can nevertheless run fully on diesel. This involves proportions of 1% diesel and 99% LNG.
The latest development in inland shipping engine configuration is the gas-electric drive. The gas-electric drive is a system whereby an inland waterway vessel uses one or a number of gas engines that drive generators (gensets) that generate electricity. This electricity goes to electric motors that drive the ship.
The following engine suppliers have (among others) LNG-powered engines in their range: Wärtsilä, PON Power/Caterpillar, Rolls Royce and Scania. These four engine manufacturers each have their own engine configurations. Some of these engines already meet the new emission standards: NRMM Fase V, for example the engine from Wärtsilä.