Evaluation of the efficiency of a Mewis duct by performance monitoring

Ζαλαχώρης, Αναστάσιος; Zalachoris, Anastasios

dc.contributor.author	Ζαλαχώρης, Αναστάσιος	el
dc.contributor.author	Zalachoris, Anastasios	en
dc.date.accessioned	2020-10-09T10:28:03Z
dc.date.available	2020-10-09T10:28:03Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/51359
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.19057
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/gr/	*
dc.subject	Mewis	en
dc.subject	Efficiency	en
dc.subject	Duct	en
dc.subject	Performance	en
dc.subject	Monitoring	en
dc.subject	Δακτύλιος	el
dc.subject	Προπέλα	el
dc.subject	Αξιολόγηση	el
dc.subject	Απόδοση	el
dc.subject	Παρακολούθηση	el
dc.title	Evaluation of the efficiency of a Mewis duct by performance monitoring	en
heal.type	bachelorThesis
heal.classification	Performance monitoring	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2020-07-22
heal.abstract	The current diploma thesis estimates the efficiency of a Mewis propeller duct utilizing a performance monitoring system. The analysis includes operational data of a three-year period for two sister vessels, Vessel 1 and Vessel 2, with the former being the one that has the duct installed during dry-dock. Once the collected data are processed and corrected, three Key Performance Indicators (KPIs) are calculated to monitor the performance of the vessels for different operational periods, such as pre-dry-dock and post-dry-dock, as well as for different loading conditions (ballast and laden). The KPI analysis aims at evaluating the duct’s efficiency through the indicators’ fluctuations over time as well as through a comparison between the two vessels’ performances. Finally, a multiple linear regression model is developed in order estimate the fuel oil consumption based on weather and sea travel related variables, such as the wind speed, the ship’s speed, her draft, trim and rudder angle. The occurring model offers a prediction for the fuel consumption, which is used in different scenarios in order to provide an alternative estimate of performance and, thus, an evaluation of the duct’s efficiency.	en
heal.advisorName	Θεμελής, Νικόλαος	el
heal.committeeMemberName	Μπελιμπασάκης, Κωνσταντίνος	el
heal.committeeMemberName	Γρηγορόπουλος, Γρηγόριος	el
heal.committeeMemberName	Θεμελής, Νικόλαος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Μελέτης Πλοίου και Θαλάσσιων Μεταφορών	el
heal.academicPublisherID	ntua
heal.numberOfPages	151 σ.	el
heal.fullTextAvailability	false