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The present study investigates the structural integrity of a wind turbine tower structure under axial compression, described as a tapered tubular structure. Initially, the NREL model of the 5 MW-net wind turbine model was adapted and then scaled down to simplify the numerical analysis and for the convenience of future experimental study. The analysis was conducted using the Finite Element Modelling software Abaqus. To ensure the validity of the FEM modelling, the benchmarking study is conducted by referring to previously published work. The case configuration was developed by varying the material properties of the tower (high, medium, and low carbon steels) and the material properties of the tower due to the effect of the site temperature. The results obtained show that high carbon steel has the best properties for use in wind turbine structures. At -80 °C, this is the temperature condition where AH32 material has the best properties.

This study addresses the complexities of shipboard desalination plants and scaling control methods in seawater distillation systems. Using advanced modeling techniques, the study examines the interaction of various parameters affecting system performance. Factors such as seawater density, thermal conductivity and specific heat capacity are considered along with scale deposition parameters such as salt concentration, scale formation rate and deposition rate. The study includes thermodynamic analysis, scale formation kinetics and heat transfer between different components of the system. The effect of salt concentration and pressure on scale deposition rate is also studied. The resulting integrated model provides insight into the optimization of desalination processes on board ships, thereby contributing to the improvement of water management strategies in offshore operations.

The share of human factor in the occurrence of navigation accidents represents a high proportion of the total accident rate. Elimination of the human factor responsible for the occurrence of navigational accidents would contribute to the overall safety of navigation on inland waterways. The main causes of human-induced navigation accidents include inattention, fatigue or poor concentration on vessel control. The design of the system for increasing navigation safety consists of a system for monitoring the life functions of a crew member as well as a position of the vessel towards the fairway / shore. The first level focuses on tracking the life function of the vessel's crew / boat master. The second level addresses the position of the vessel and the possibility of increasing safety by cooperating with the data provided by Automatic Identification System - AIS. The proposal of the system represents interconnection of both levels and brings high degree of control of the vessel in extraordinary situations.