Τεχνική, οικονομική και περιβαλλοντική αξιολόγηση της χρήσης του φυσικού αερίου ως εναλλακτικού καυσίμου σε πλοία

Αντωνίου, Ελένη

Technical, economic and environmental assessment of the use of natural gas as alternative maritime fuel

Master Thesis

Author

Αντωνίου, Ελένη

Date

2022-06

Abstract

Within the context of this work, firstly, natural gas will be examined as marine fuel and its physical and chemical properties will be recorded and commented, as well the ways of its production and its transport on ships. Furthermore, the power supply technology of natural gas and its combustion will be examined, in two-stroke marine engines and in medium-speed four-stroke marine engines. The combustion technologies of natural gas in two-stroke marine engines will be compared to these of medium speed four-stroke marine engines and both advantages and disadvantages of each one, will be recorded. Subsequently, the natural gas’ liquefaction technologies will be examined, as well as its storage at low temperatures, to have liquified natural gas (LNG) on ships and the corresponding technical challenges will be explored. In terms of technical evaluation of natural gas’ usage as maritime fuel, the required retrofits of conventional marine diesel engines will be examined, to be able to operate with natural gas. Concerning the environmental evaluation of natural gas’ usage by shipping industry, gaseous emissions by combustion systems and by marine gas engines will be compared to the corresponding emissions of conventional marine engines, which use heavy fuel oil. Natural gas’ technology will be compared to other technologies, which aim to decrease the emitted pollutants by ships, to record natural gas’ advantages and disadvantages. Within the context of economic analysis of natural gas use from ships, the capital and operational costs of an LNG carrier will be examined, via a corresponding case study. Moreover, the retrofit cost of a conventional ship, so that its engines to be able to operate on natural gas, will also be examined. Concluding, in terms of natural gas’ energy analysis, the effect of natural gas use, on the energy efficiency indices for new buildings (EEDI) and for existing ships (EEXI, EEOI, CII), will be examined.

Postgraduate Studies Programme

ΔΠΜΣ στη Διοίκηση στη Ναυτική Επιστήμη και Τεχνολογία

Department

Σχολή Ναυτιλίας και Βιομηχανίας. Τμήμα Ναυτιλιακών Σπουδών

Corporate Department

Σχολή Ναυτικών Δοκίμων

Number of pages

Language

Greek

URI

https://dione.lib.unipi.gr/xmlui/handle/unipi/14429
http://dx.doi.org/10.26267/unipi_dione/1852

Collections

Τμήμα Ναυτιλιακών Σπουδών

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Except where otherwise noted, this item's license is described as
Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα