Contributions to the optimization of air flow in machinery room ventilation systems for special ships

Numerical analyses can demonstrate the poor performance of obsolete ventilation systems and the need to replace or improve them. At the same time, given the destination of the ship that can operate in extreme climates, an efficient ventilation system for machinery rooms is vital. It has been shown in numerous scientific studies that the dispersion and accumulation of gases in the machinery room depends on multiple parameters and under the influence of the temperature gradient and its chemical characteristics, it tends to accumulate in the upper areas of the compartment. Therefore, the flow rate of the ventilation extraction system must be approximately 107 [%] of the flow rate of the air intake system according to the English standard NES 102 [1]. During the study, modelling and simulation were performed with the help of an Engineering Simulation Software to explore and predict how systems will behave in the real world.