International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

In the present publication are considered the features of the dual fuel four stroke lean burn engines supercharging system operational features. The supercharging system control means are analysed and performance data is collected from an engine in operation on an offshore vessel. The data obtained from the engine in operation is analysed, processed and figures of related parameters are obtained. The latter are analysed in relation to the importance of the supercharging technical condition. Conclusions and recommendations are stated as a final outcome.

In the proposed publication it is conducted simulation-based experiment with the bunkering process of type “C” LNG containing tank. According to the specific features of the LNG bunkering process it is analysed the nature of the boiling off mechanism of the cryogenic fluid during bunkering transfer. The attained data by the experiment is analysed including the specific condition of heat ingress simulation. On the base of the results there are stated conclusions and recommendations to the ship operators related to the limiting conditions of the pressure vessels operation as it is the type “C” tank.

In the present publication it is considered the technology and the features of the operation of the newly introduced in the marine industry wide spreading dual fuel four stroke engines. There are analysed the significant differences between the conventional Diesel engines and the dual fuel Otto engines in their operation process. The influence of the gas fuel quality in the case of the dual fuel engines is in the main concern underlined. Simulation based experiment is carried out for data attaining, related to the performance of the dual fuel engines influenced by the fuel quality on high load range. The acquired data is analysed, and evaluation of the engine derating outcome is performed. On the base of the results are stated conclusions and recommendations to be followed by the engineering crew members dealing with such kind of engines on board LNG fuelled ships.

In this publication the wash water subsystem features of an exhaust gas recirculation (EGR) system of marine diesel engine are considered. In regard with the safety of the operation, a procedure for handling the wash water system of the EGR is proposed. The chemical reactions between the flue gas and the process water are observed. The wash water system components and their specifics related to the chemical reactivity are presented. The problems with the water impurities, pH value and the operation of the EGR system are highlighted. The engineering crew special precautions on safety on using caustic soda on board is considered. Recommendations are proposed.