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Study examines improvement potential in diesel electric LNG carrier propulsion

 ABB has disclosed details of a comprehensive study from DNV-GL R&D examining the potential for efficiency improvements of dual fuel diesel electric (DFDE) propulsion.Simulations indicate diesel electric propulsion can be a fuel efficient solution for LNG carriers under realistic operating conditions.The outcome of the study shows that it is possible to improve overall vessel efficiency and thus asset competitiveness in certain vessel and configuration cases. Furthermore, it demonstrates that an optimized DFDE LNG carrier can be a highly fuel efficient solution for the specific case and boundaries of the study. ABB requested DNV-GL R&D to undertake an analysis of DFDE propulsion under realistic operating conditions for LNG carriers, rather than relying on calculations using design specifications. LNG carrier machinery systems are highly complex featuring tightly integrated sub-systems and components.Using DNV GL’s analytical tools, the study made calculations based on realistic operating conditions. Data for the study was either provided by ABB or taken from publicly available literature. A Competitive Business Case for Ship Owners DNV GL R&D used three representative operating profiles based on distance specific trade route for a typical 174k twin skeg LNG carrier, including laden/ballast sailing modes and non-sailing modes, while considering not only propulsion power and ...

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