With reference to marine diesel engine (SCR) (a) Explain, with the aid of a graph, the influence of the fuel sulfur content on the operation of an SCR unit. (4) (b) Explain how the operation of a turbocharger system can have a detrimental effect on the unit when burning fuels with higher sulfur content (4) (c) Describe, with the aid of a sketch, a system which maintains good engine performance of the turbocharger system and good NOx reduction when buying fuels with higher sulfur content, explaining how conflicting conditions are met. (8)
Emission control
UKM Tuticorin 
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