Examining the effect of a wind-assisted propulsion system (flettner rotors) on ship's energy efficiency

Γκούφας, Δημήτριος; Gkoufas, Dimitrios

dc.contributor.author	Γκούφας, Δημήτριος	el
dc.contributor.author	Gkoufas, Dimitrios	en
dc.date.accessioned	2023-03-29T06:41:06Z
dc.date.available	2023-03-29T06:41:06Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/57351
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.25049
dc.rights	Αναφορά Δημιουργού 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/gr/	*
dc.subject	Ενεργειακή αποδοτικότητα	el
dc.subject	Flettner Rotors	en
dc.subject	EEDI	en
dc.subject	Rotor Sails	en
dc.subject	Δείκτης σχεδιασμού ενεργειακής απόδοσης	el
dc.subject	Wind-assisted propulsion system	en
dc.subject	IMO	en
dc.subject	Σύστημα υποβοήθησης πρόωσης από τον άνεμο	el
dc.subject	Βιώσιμη ενέργεια	el
dc.subject	Πρόγραμμα πρόβλεψης απόδοσης	el
dc.title	Examining the effect of a wind-assisted propulsion system (flettner rotors) on ship's energy efficiency	en
dc.title	Εξέταση της επίδρασης συστήματος υποβοήθησης της πρόωσης από τον άνεμο στην ενεργειακή αποδοτικότητα του πλοίου	el
heal.type	bachelorThesis
heal.classification	Αξιολόγηση απόδοσης πλοίου	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2023-03-01
heal.abstract	Due to the increasing urgency for decarbonization in the maritime industry, wind-assisted cargo ships have the potential to play a crucial role in achieving the IMO 2050 goal of reducing the total annual GHG emissions from international shipping. The purpose of this thesis is to contribute knowledge on the performance of Rotor Sails on commercial vessels, which are widely considered as a leading Wind-Assisted Propulsion System (WASP). The operating principles of the Flettner rotor are analyzed and a set of Matlab codes is developed and utilized to generate results related to the rotor's energy aspects, with the ultimate aim of determining the Energy Efficiency Design Index (EEDI). This research presents and compares the EEDI results under various wind conditions, as well as for rotors with diverse mechanical properties, thereby providing a deeper understanding of the energy capabilities of Flettner rotors. The findings from this research indicate that the results of the power propulsion of the rotor are significantly influenced by its dimensions, mechanical and structural properties, as well as the wind conditions encountered by the vessel. Based on the aforementioned outcomes, recommendations are being made regarding the optimization of calculating the efficiency of Flettner rotors. Lastly, a case study is carried out for a bulk carrier equipped with 4 rotor sails to evaluate the EEDI through two separate methodologies. Initially, the original method proposed by the IMO for calculating EEDI is employed and then another methodology is utilized, which involves a series of calculations to determine the total propeller thrust of the vessel and ultimately calculate the power required from the engine. The results of this case study outline the significance of wind conditions as well as the impact of the forces exerted by wind and waves, not only on the Flettner rotors but on the vessel as a whole.	en
heal.advisorName	Θεμελής, Νικόλαος	el
heal.advisorName	Themelis, Nikolaos	en
heal.committeeMemberName	Zarafonitis, Georgios	el
heal.committeeMemberName	Ζαραφωνίτης, Γεώργιος	en
heal.committeeMemberName	Papadakis, Georgios	el
heal.committeeMemberName	Παπαδάκης, Γεώργιος	en
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Μελέτης Πλοίου και Θαλάσσιων Μεταφορών	el
heal.academicPublisherID	ntua
heal.numberOfPages	87 σ.	el
heal.fullTextAvailability	false