Extreme value analysis of environmental parameters and energy output estimation of a multi-purpose floating structure at specific locations in the Greek seas suitable for wind and wave energy exploitation.

Kardakaris, Kimon; Καρδακάρης, Κίμων

dc.contributor.author	Kardakaris, Kimon	en
dc.contributor.author	Καρδακάρης, Κίμων	el
dc.date.accessioned	2022-11-07T10:26:45Z
dc.date.available	2022-11-07T10:26:45Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/56103
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.23801
dc.description	Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Ναυτική και Θαλάσσια Τεχνολογία και Επιστήμη”	el
dc.rights	Default License
dc.subject	Extreme value analysis	en
dc.subject	Hybrid wind-wave energy	en
dc.subject	Multi-purpose floating platform	en
dc.subject	Catenary mooring system	en
dc.subject	Greek seas	en
dc.title	Extreme value analysis of environmental parameters and energy output estimation of a multi-purpose floating structure at specific locations in the Greek seas suitable for wind and wave energy exploitation.	en
heal.type	masterThesis
heal.classification	Marine Renewable Energy	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2022-09-08
heal.abstract	The present thesis describes the methodology for an Extreme Value Analysis of wind and wave parameters at three specific locations in the Greek seas that are known to be advantageous in terms of joint power production (both offshore wind and wave) and bathymetric conditions. The analysis is conducted via the Peak-Over-Threshold method examining wind speed, significant wave height and peak wave period data from the ERA5 reanalysis dataset. Moreover, a suitable multi-purpose floating platform is presented that can be adequately utilized for co-exploitation at the selected locations. The mooring system of the platform was also designed, as it was modified from the initial tensioned tethers concept (TLP) to catenaries. Regarding this, using the quasi-static approach, two cases were investigated in terms of material, studless chains and wire ropes, and their stiffness characteristics were specified. Subsequently, a coupled hydro-aero-elastic analysis was performed and special attention was drawn to platform’s responses, OWCs’ inner pressure as well as line tensions. Additionally, a dynamic analysis regarding the catenary mooring system consisting of studless chains was conducted in order to approach a more realistic behavior, taking into account the mooring damping effects. The aforementioned analyses were performed via software available at the Laboratory for Floating Structures and Mooring Systems (LFSMS) in the School of Naval Architecture and Marine Engineering in NTUA. Furthermore, offshore wind and wave energy output was estimated for the examined locations, whereas the different mooring systems were compared in terms of OWC efficiency. For offshore wind, results are presented in annual and monthly scale and the annual capacity factor is estimated, while for wave energy the JONSWAP spectrum is used. Last but not least, theoretical background referring to hydrodynamics, floaters and moorings are presented herein, along with a brief review on the status, research and development of the offshore wind market and infrastructure.	en
heal.advisorName	Σουκισιάν, Τακβόρ	el
heal.committeeMemberName	Σουκισιάν, Τακβόρ	el
heal.committeeMemberName	Κονισπολιάτης, Δημήτριος	el
heal.committeeMemberName	Μπελιμπασάκης, Κωνσταντίνος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών	el
heal.academicPublisherID	ntua
heal.numberOfPages	173 σ.	el
heal.fullTextAvailability	false