The Research on Emission Performance of Large Marine Diesel Engine Based on Performance Parameters Analysis

For the large marine main propulsion diesel engine, before delivered to shipyards should be evaluated NOx emission. This paper proposed a method just by analyzing the related parameters to evaluate the emission of marine diesel engine. Based on the small bore marine main propulsion diesel engine, analyzed the variation of performance parameters, to evaluate the emission performance at the condition of different power/speed at CMCR point and electric control mode. And the analysis results show that, for the same main propulsion diesel engine, the power of CMCR point has no obvious effect on the NOx emission performance, while the electric mode has a certain effect on the NOx emission performance. Finally, shop testing ware carried out to measure the NOx emission at the above condition, and the testing results approved the analysis results, and the parameter analysis method can be used in the practice.