Τεχνική και περιβαλλοντική αξιολόγηση της χρήσης μεθανόλης σε πλοία
View/ Open
Keywords
Μεθανόλη ; Εναλλακτικά καύσιμα ; Εκπομπές ρύπων ; Ναυτικοί κινητήρεςAbstract
The main objective of the present thesis is the technical and environmental assessment of the methanol as alternative fuel for shipping. Methanol is an alternative fuel with small percentage of carbon in its molecule and thus, it can be used in main and auxiliary engines to significantly reduce the carbon footprint of various types of vessels. In the context of the present study, various production methods of fossil methanol and bio-methanol are reviewed and critically evaluated to assess the individual characteristics and the advantages and disadvantages of each method. The chemical and physical properties of methanol were examined, and they were compared with pertinent properties of other conventional and alternative marine fuels. Following this analysis, experimental and theoretical results obtained from the literature, and they involved the impact of methanol on the performance characteristics and on emitted pollutants of marine methanol engines are thoroughly evaluated to assess the repercussions of methanol on the operational capacity and quality of marine engines and to assess the relative impact of methanol on the environment. The analysis of the results of the present study showed that methanol is a promising alternative marine fuel that can offer significant reduction of the carbon footprint of various types of vessels contributing thus to the realization of IMO greenhouse emission reduction initiatives.