| dc.description.abstract | The aim of this thesis is to analyze the technical and economic aspects of a conceptual Subsea Friegit Glider (SFG). The SFG is an ideal alternative to tanker ships and offshore pipelines for transporting liquefied CO2. Moreover, it can also be used to transport any type of cargo. The SFG travels below the sea surface, which makes it weather independent. Firstly, the technical feasibility study is carried out by developing a baseline design with a length of 56.5 m, a beam of 5.5 m, and a cargo volume of 1194 m3. The design for the SFG is developed following the standard originally created for military vessels DNV GL-RU-NAVAL-Pt4Ch1 and ASME oiler and Pressure Vessel Code. Additionally, two more submarines are designed and included in the analysis: the half-scaled 469 m3 and double-scaled 2430 m3 models of the SFG baseline design. The technical feasibility analysis shows that the models meet the requirements and they are able to perform the mission. Secondly, the economic feasibility analysis is performed using publicly open MUNIN D9.3 and ZEP cost models. The cost analysis presents a case study with a CO2 transport of 180 km to 1500 km and a capacity of 0.5 to 2.5 mtpa (million tons per annum). The results of cost analysis are compared with the SFG, crewed and autonomous ship tanker, offshore pipelines and conceptual Subsea Shuttle Tanker. The results of the study indicate that the various types of the SFG (469 m3, 1194 m3, and 2430 m3) are technically feasible. They are also competitive with the smaller CO2 capacities of around 0.5 and 1 mtpa and distances of 180 to 500 km. | |
