Τhe ventilation in the ship engine rooms is an essential issue concerning finest performance of engines and diesel generators as well as electric motors. The present study has aimed at the analysis of temperature distribution inside the ship main engine room. In the same way, attempts have been made to identify those points with considerable thermal concentration in main engine room space, so that proper ventilation systems could be engineered and utilized and favorable thermal conditions could be realized. The CFD approach has been utilized in order to analyze impact of the designed ventilation system on the temperature distribution pattern. The Inlet layout and area have been analyzed under a variety of scenarios in order to decrease the average temperature and eliminate the heat concentrations in various points of the engine room. The temperature distribution and location and area of ventilation air inlet have been studied in different modes resulted in temperature distribution pattern, heat concentration outline and average volumetric temperature level in each mode. The results indicated that considerable circulating air volume is required compared to those levels suggested by common practices, calculations and standards in order to eliminate the heat concentration.

/pdf/an-investigation-of-the-effect-of-ventilation-inlet-and-1260bu16dj.pdf

An Investigation of the Effect of Ventilation Inlet and Outlet Arrangement on Heat Concentration in a Ship Engine Room

In order to pre-determine the ventilation effectiveness of the closed cabin ventilation system and to identify the potential problems in airflow organization or temperature distribution in the preliminary design,the steady three-dimensional turbulent flow inside the ventilation system is simulated via CFDThen,several substantial improvements on the system are made,which includes the addition of inlet and outlet vents in the front wall of the engine rooms and changing the airflow direction on both sidesThe test result is highly consistent with the estimation from empirical formulas and shows that the proposed optimi zation scheme significantly improves the airflow organization and ventilation effectiveness

Three-Dimensional Numerical Simulation of the Ventilation System in Closed Engine Rooms Based on CFD

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Three-Dimensional Numerical Simulation of the Ventilation System in Closed Engine Rooms Based on CFD