Session: 14-01-01 - New Concepts & Retrofit Solutions

Submission Number: 180095

Decision Support for Defossilization Pathways for a Selected Fleet Operating in a Green Corridor 

The maritime sector contributes approximately 3% of the total greenhouse gas emissions worldwide. Regulatory bodies such as the IMO and the EU have passed laws, which aim to achieve net zero emissions of waterborne trade by 2050. However, to drive the green transition forward, significant efforts by private stakeholders are necessary. One such way is the establishment of “green corridors” between ports to encourage the use of alternative fuels and energy saving measures.
To evaluate, which combinations of energy systems, fuels and energy saving methods, such as Wind Assisted Ship Propulsion (WASP), are the most cost effective for a fleet operating in such a green corridor, the tool “ReFleet” is developed. ReFleet evaluates defossilisation pathways using a design of experiment (DOE) approach for individual vessels by assessing the total costs of ownership (TCO) for adopting different alternative propulsion systems, energy saving methods and their combinations to support the technology selections of ship owners.
The energy and fuel demand, as well as the emissions of the fleet currently operating between the ports of the selected green corridor are calculated based on Automatic Identification System (AIS) data. The current fuel demand and the vessels emissions are used to assess the regulatory compliance and expected penalties should ship owners continue to operate in the same manner. For the alternative energy systems, an extensive database encompassing technical and economic parameters for the various components is compiled. To account for technological progress over time, the parameters are scaled using learning curves based on historical and literature data. The defossilisation pathways can then be assessed based on their TCO and the vessels total emissions over the course of the optimisation period to suggest optimal pathways for the chosen fleet. A case study is carried out for a fleet operating in an established green corridor in the southern Baltic Sea. 
The findings support ship owners in selecting an economically feasible defossilisation strategy which is compliant with international regulations encompassing a wide variety of energy systems including the utilisation of WASP. Port operators receive support in aligning and coordinating investments in alternative fuel infrastructure tailored to the fleet operating within the designated green corridor in the southern Baltic Sea.

Presenting Author: Travis Teske German Aerospace Center - Institute of Maritime Energy Systems

Presenting Author Biography: Travis Teske is a research Scientist and PhD Candidate working at the German Aerospace Center´s Institute of Maritime Energy Systems in Kiel, where he focusses on network design for energy infrastruture. He studied industrial engineering at the University of Hamburg with a focus on Energy Technology and Supply Chain Management.

Authors:

Travis Teske German Aerospace Center - Institute of Maritime Energy Systems
Shaghayegh Kazemi Esfeh German Aerospace Center - Institute of Maritime Energy Systems
Annika Fitz German Aerospace Center - Institute of Maritime Energy Systems
Maria Elizondo Guerrero German Aerospace Center - Institute of Maritime Energy Systems
Thorben Schwedt German Aerospace Center - Institute of Maritime Energy Systems
Lars Schmitz German Aerospace Center - Institute of Maritime Energy Systems
Andres Felipe Percy Toscano German Aerospace Center - Institute of Maritime Energy Systems
Lars Baetcke German Aerospace Center - Institute of Maritime Energy Systems
Sören Ehlers German Aerospace Center - Institute of Maritime Energy Systems