Version 1
: Received: 27 September 2024 / Approved: 29 September 2024 / Online: 29 September 2024 (10:30:39 CEST)
How to cite:
Aguillon Salazar, A.; Salameh, G.; Chesse, P.; Bulot, N.; Thevenoux, Y. Impact of Optimization Variables on Fuel Consumption in Large Four-Stroke Diesel Marine Engines with Electrically Divided Turbochargers. Preprints2024, 2024092310. https://doi.org/10.20944/preprints202409.2310.v1
Aguillon Salazar, A.; Salameh, G.; Chesse, P.; Bulot, N.; Thevenoux, Y. Impact of Optimization Variables on Fuel Consumption in Large Four-Stroke Diesel Marine Engines with Electrically Divided Turbochargers. Preprints 2024, 2024092310. https://doi.org/10.20944/preprints202409.2310.v1
Aguillon Salazar, A.; Salameh, G.; Chesse, P.; Bulot, N.; Thevenoux, Y. Impact of Optimization Variables on Fuel Consumption in Large Four-Stroke Diesel Marine Engines with Electrically Divided Turbochargers. Preprints2024, 2024092310. https://doi.org/10.20944/preprints202409.2310.v1
APA Style
Aguillon Salazar, A., Salameh, G., Chesse, P., Bulot, N., & Thevenoux, Y. (2024). Impact of Optimization Variables on Fuel Consumption in Large Four-Stroke Diesel Marine Engines with Electrically Divided Turbochargers. Preprints. https://doi.org/10.20944/preprints202409.2310.v1
Chicago/Turabian Style
Aguillon Salazar, A., Nicolas Bulot and Yoann Thevenoux. 2024 "Impact of Optimization Variables on Fuel Consumption in Large Four-Stroke Diesel Marine Engines with Electrically Divided Turbochargers" Preprints. https://doi.org/10.20944/preprints202409.2310.v1
Abstract
This study investigates the effect of different variables in the optimization of a hybrid air charging systems for marine diesel engines, exploring the potential for energy recovery and assistance using electric machines. The optimization parameters include turbine speed, compressor power, start of injection, turbomachine size, and valve timing. At low engine speeds, the larger improvements come from increasing compressor power, which increases air-to-fuel ratio compared with the baseline turbocharging. As free-floating turbocharged engines are known to have low air-to-fuel ratio at low engine speeds, the relative improvement of the hybrid architecture is large at low engine speeds, being near to 10% less BSFC. At high engine speeds, the largest influence is marked by the SOI, an early injection obtains a faster combustion, which improves gross efficiency. However, the relative improvement compared with baseline turbocharger is less than 1% at high engine speeds. Due to the distribution of relative improvement of BSFC, this architecture has a deeper impact on fuel consumption in vessel operating cycles that focus on low engine speeds and loads, such as those of tugboats.
Keywords
electric hybrid turbocharger; electric compressor; power recovery turbine; fuel consumption; marine diesel propulsion engine; CO2 reduction
Subject
Engineering, Marine Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
