Journal
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
Volume 102, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.trd.2021.103145
Keywords
Shipping; GHG; Alternative fuels; Multi-objective; Optimization; Flexibility; Retrofit
Funding
- Norwegian Research Council under the SFI Smart Maritime [237917]
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The study formulates the selection of alternative fuels and corresponding ship power systems as a bi-objective integer optimization problem, finding that LNG and biofuels have significant impacts on greenhouse gas emissions reductions in shipping. The model identifies LNG as a robust power system choice today, while ammonia produced from renewable electricity appears to be the most cost-effective option for higher emission reduction ambitions.
Alternative fuels and fuel-flexible ships are often seen as promising solutions for achieving significant greenhouse gas reductions in shipping. We formulate the selection of alternative fuels and corresponding ship power systems as a bi-objective integer optimization problem. We apply our model to a Supramax Dry-bulker and solve it for a lower bound price scenario including a carbon tax. Within this setting, the question whether bio-fuels will be available to shipping has significant effect on the lifetime costs. For the given scenario and case study ship, our model identifies LNG as a robust power system choice today for a broad range of GHG reduction ambitions. For high GHG reduction ambitions, a retrofit to ammonia, produced from renewable electricity, appears to be the most cost-effective option. While these findings are case-specific, the model may be applied to a broad range of cargo ships.
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