Weather rooting system

Φουντούλη, Κωνσταντίνα; Fountouli, Konstantina

dc.contributor.author	Φουντούλη, Κωνσταντίνα	el
dc.contributor.author	Fountouli, Konstantina	en
dc.date.accessioned	2022-07-20T09:35:31Z
dc.date.available	2022-07-20T09:35:31Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/55447
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.23145
dc.rights	Default License
dc.subject	Weather	en
dc.subject	Rooting	en
dc.subject	Forecast	en
dc.subject	Optimum	en
dc.subject	Containership	en
dc.title	Weather rooting system	en
heal.type	bachelorThesis
heal.classification	Marine engineering	el
heal.language	en
heal.access	campus
heal.recordProvider	ntua	el
heal.publicationDate	2021-07-23
heal.abstract	Subject of this diploma thesis is the development of a weather routing system. Weather routing is the process of choosing the optimal route for a given vessel, journey and weather conditions. Criteria for the determination of the optimal route may vary according to the user preferences, the type of vessel, etc. First, the function of the system is presented. For a voyage of study, several candidate routes are produced. These candidate routes differ from each other in terms of geographical path and vessel speed. Worldwide weather and current data are used to model the sea state for every part of each route. For the vessel of study, seakeeping characteristics are pre-calculated for a range of ship’s speeds, wave frequencies and heading angles using the software NewDrift+. Combining the weather data and the vessel’s seakeeping characteristics database, ship responses and total resistance are determined for every route. Total fuel oil consumption is calculated for every route taking into account the vessel’s main engine’s characteristics and the ship’s total resistance. Before optimal route is selected, safety criteria are imposed to all routes. Routes than do not meet these criteria are considered unfeasible and are excluded from the optimal route selection. Finally, optimal route is considered the one with the minimal fuel oil consumption. A case study is presented in order to prove the functionality of the weather routing system. A containership journey from South Africa to Australia during autumn of 2018 was chosen for this purpose. Vessel’s geometry is used to calculate its seakeeping characteristics and water resistance curve. For the voyage of study, fifty candidate routes are produced. Seakeeping criteria used to determine unfeasible routes in this case are taken according to research project HOLISHIP. Additionally, a realistic upper time limit for this voyage is introduced to ensure the timely arrival of the vessel. Results calculated for all routes are presented in graphical form and unfeasible routes are determined. Finally, the route with minimal fuel oil consumption is suggested as optimal. Optimal route is compared with orthodrome and loxodrome routes for the same voyage, in order to prove the advantages of using the weather routing system. In the end of this thesis, suggestions for further study are discussed.	el
heal.advisorName	Ζαραφωνίτης, Γεώργιος	el
heal.committeeMemberName	Ηλιοπούλου, Ελευθερία	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Μελέτης Πλοίου και Θαλάσσιων Μεταφορών	el
heal.academicPublisherID	ntua
heal.numberOfPages	68 σ.	el
heal.fullTextAvailability	false