ABB has disclosed details of a study by DNV-GL R&D that examines the potential for efficiency improvements in dual fuel diesel electric (DFDE) propulsion systems. The study showed that it is possible to improve overall vessel efficiency and thus asset competitiveness when employed optimally and in combination with waste energy recovery technologies.
ABB requested the class society undertake an analysis of DFDE propulsion under realistic operating conditions for LNG carriers. Data for the study was either provided by ABB or taken from publicly available literature.
When taking into consideration round trip data, operating profiles and fuel costs the study found that DFDE can be a more fuel-efficient solution compared to other alternatives. ABB highlighted that depending on the specific speed profile and fuel costs, annual fuel savings can be considerable.
DFDE propulsion was first ordered for an LNG carrier in 2003 and has since been installed on 180 vessels. ABB said that DFDE propulsion is compatible with future technologies, as it has the potential to enhance efficiency in fuel cells and advanced energy storage.