Schiff&Hafen | Ausgabe 09/2021
Efficient hybrid-electric propulsion Schottel | Operating profiles of tugs
Operating profiles of tugs and workboats feature low engine loads for up to 90% of active time. In such instances, an engine that is rated for maximum propulsive power works in an unfavourable partial-load range that is inefficient in terms of emissions and fuel consumption. Hybrid drive systems are designed specifically for applications with highly variable power ranges. These generally consist of two separate power sources (diesel and/or electric motors) per propeller with different power ratings....