Tytuł: The Possibility of Using Hydrogen as a Green Alternative to Traditional Marine Fuels on an Offshore Vessel Serving Wind Farms

Autor/Autorzy: Bortnowska M., Zmuda A.

Miejsce publikacji: Energies

Rok: 2024

Słowa kluczowe: 

Abstrakt: 

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 DOI: 

Tytuł: Design analysis of an innovative concept of a displacement motor yacht with eco-drive

Autor/Autorzy: Bortnowska M. , Kapała D.

Miejsce publikacji: Scientific Journals of the Maritime University of Szczecin

Rok: 2024

Słowa kluczowe:  conceptual design, futuristic motor yacht, electric propulsion, stability analysis

Abstrakt: In response to the challenges of environmental protection and the need to be close to nature and to reconnect with it, an unusual motor yacht design is developed with an abstract architectural form modeled on an armadillo. Due to the innovative form of the hull, a specific approach to pre-design is used, with the research objective of verifying that for the organic form of the hull, it would be possible to meet all the design criteria and regulations required for the design of a yacht. This article first characterizes the initial assumptions and then presents the process of determining the main dimensions with simultaneous modification of the hull shape. In order to maintain the basic dimensional proportions, based on the classic motor yacht, the recommended values of design factors are controlled. Moreover, the hydrostatic parameters of the unconventional hull shape are calculated. As a result of preliminary resistance and propulsion analyses, a propulsion system in the form of electric motors is selected, and, to meet emission requirements, the use of photovoltaic panels is additionally proposed. A stability and equilibrium analysis is carried out for one of the load cases and checked with the requirements of the Polish Register of Shipping (PRS) rules. The design of the hull of the yacht, covered in an interesting form of scales, together with the layout of the yacht’s interior, is presented in three-dimensional form, bringing the conceptual idea to life. The result of the design work and analysis is an inspiring hull shape based on nature, complying with the design guidelines and regulations that apply to yacht design.

Adres strony internetowej (link) do pełnego tekstu publikacji: https://repository.am.szczecin.pl/handle/123456789/2811

 DOI: 10.17402/594

Tytuł: Projected Reductions in CO2 Emissions by Using Alternative Methanol Fuel to Power a Service Operation Vessel

Autor/Autorzy: Bortnowska M.

Miejsce publikacji: Energies

Rok: 2023

Słowa kluczowe: alternative fuel, decarbonization, LNG, methanol, Service Operation Vessel (SOV), EIV index

Abstrakt: Due to increasingly stringent IMO and European Commission requirements for greenhouse gas emissions, the present study analysed the projected reductions in CO2 emissions achieved by using methanol as an alternative fuel to power custom service operation vessels (SOVs) serving wind platforms in the Baltic Sea. Methanol is a relatively new fuel, approved for use as a safe marine fuel in the late 2020s. In these analyses, reference was made to the current interim guidelines, supplementing the IGF Code in the form of MSC.1/Circ.1621. The SOV type was chosen because of the current growing demand for these ships (the dynamic development of offshore wind power) and the lack of analyses of this type of small craft. The importance of assessing CO2 emissions in this case is due to the specifics of the vessel’s operation in different modes, and thus the variable load on the propulsion system and the area of operation close to the coastline. A computational research method was used to evaluate CO2 emissions, as well as the cost of methanol fuel, using current regulations and technical data. A comparison was also made between conventional MDO and LNG fuels. The first results of the analysis showed that methanol fuel is only competitive with MDO (a few-percent advantage) in terms of the average estimated index value EIV. Economically, it will require a higher investment, despite the favourable unit price of methanol compared to LNG and MDO.

Adres strony internetowej (link) do pełnego tekstu publikacji: https://www.mdpi.com/1996-1073/16/21/7419

 DOI: 10.3390/en16217419