Browsing by Author "Ahola, Veikko"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Matkustajalaivojen Safe Return to Port -säännöt
    (2017-04-30) Ahola, Veikko
     Insinööritieteiden korkeakoulu | Bachelor's thesis
  • The potential of fuel cells as prime energy producers on cruise ships
    (2021-08-23) Ahola, Veikko
     Insinööritieteiden korkeakoulu | Master's thesis
    Green technologies and conceptsof cruise industry are at the moment probably more current than ever before, while operators search for ways to cope with the stricter regulation and goals regarding the development of greenhouse gas and other emissions. Fuel cell power systems may replace conventional systems (e.g. internal combustion engines) in light of new stricter requirements. This thesis analyzes the changes and challenges in a cruise ship’s energy balance and general arrangement the fuel cell propulsion would cause. Energy producers and consumers of a 77,000 GT cruise ship aimed for international operation are identified and analyzed to form the energy balance for a state-of-art-cruise ship using the conventional technology at port and at the speed of 20 knots. Different possibilities to further utilize the energy flows onboard are reviewed, too. Consequently, the different fuel cell technologies (LT-PEMFC, HT-PEMFC and SOFC) and fuel options (hydrogen, ammonia, natural or biogas and methanol) with associated fuel processing systems are described and compared with the aim to find combinations of technologies (fuel cells and fuel systems) that can be utilized in a cruise ship. An overview of regulations and guidelines for fuel cell installation is also presented. The impact on the general arrangement and energy balance is studied in three different cases. The main goal is to get a clear picture of what does the leap from combustion engines to fuel cells mean for a cruise ship’s arrangement and whether it is feasible to build a cruise ship with similar service concept to today’s cruise ship using only fuel cell technology given the restrictions of cruise ship characteristics. In conclusion, despite certain challenges, the fuel cell propulsion is feasible and equivalent in terms of energy capacity as compared to a typical LNG-MGO dual fuel arrangement.