Quantitative assessment of propeller and silicone hull coating retrofits in LNG carriers using operational performance data

Chougiouris, Nikolaos E.; Asvestis, Dimitrios V.; Χουγιούρης, Νικόλαος; Ασβέστης, Δημήτριος

dc.contributor.advisor	Pariotis, Efthimios
dc.contributor.advisor	Παριώτης, Ευθύμιος
dc.contributor.author	Chougiouris, Nikolaos E.
dc.contributor.author	Asvestis, Dimitrios V.
dc.contributor.author	Χουγιούρης, Νικόλαος
dc.contributor.author	Ασβέστης, Δημήτριος
dc.date.accessioned	2026-09-24T10:39:44Z
dc.date.available	2026-09-24T10:39:44Z
dc.date.issued	2026-08
dc.identifier.uri	https://dione.lib.unipi.gr/xmlui/handle/unipi/19784
dc.format.extent	37	el
dc.language.iso	en	el
dc.publisher	Πανεπιστήμιο Πειραιώς	el
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
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.title	Quantitative assessment of propeller and silicone hull coating retrofits in LNG carriers using operational performance data	el
dc.type	Master Thesis	el
dc.contributor.department	Σχολή Ναυτιλίας και Βιομηχανίας. Τμήμα Ναυτιλιακών Σπουδών	el
dc.description.abstractEN	This thesis quantitatively assesses two energy efficiency retrofits fitted to two LNG carriers, LSA and PL: a silicone fouling-release coating and Propeller Boss Cap Fins (PBCF). Using ISO 19030 based comparison of pre- and post-retrofit data, each retrofit's effect on required power is measured across speed and loading condition, then converted into fuel-cost savings and investment metrics. Both retrofits show a measurable, positive improvement. The silicone coating reduces required power by 0.54% to 8.01%, larger in Ballast than Laden and at low speed than high speed. PBCF reduces required power by 10.42% (Laden) and -2.43% (Ballast) at real average speed, a small Ballast loss offset by Laden's larger gain, on a thinner data sample. Both retrofits recover their cost well within their economic life: the silicone coating returns an NPV of approximately EUR421,000, based on measured fuel consumption rather than power reduction (IRR 34.6%, payback 2.24 years), and PBCF returns an NPV of approximately EUR2.1 million (IRR over 490%, payback 74 days), reflecting its low capital cost. Neither retrofit's benefit is fixed: both vary meaningfully with loading condition and speed, showing that evaluating retrofits against a vessel's real operating profile gives a more defensible economic case than a single-point estimate.	el
dc.corporate.name	Hellenic Naval Academy	el
dc.contributor.master	ΔΠΜΣ στη Διοίκηση στη Ναυτική Επιστήμη και Τεχνολογία	el
dc.subject.keyword	LNG carrier retrofit performance	el
dc.subject.keyword	ISO 19030	el
dc.subject.keyword	Silicone fouling-release coating	el
dc.subject.keyword	Propeller boss cap fins	el
dc.subject.keyword	Retrofit economic evaluation	el
dc.date.defense	2026-08-28

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Τμήμα Ναυτιλιακών Σπουδών
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Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα