Patent ID: 8607554

Claim:
An apparatus, comprising: a marine genset including an internal combustion engine and an electric power generator mechanically driven by the engine; an exhaust manifold for the engine including an exhaust gas conduit; an exhaust emission aftertreatment device including an exhaust passage in fluid communication with the conduit to receive exhaust therefrom, the exhaust emission aftertreatment device including a catalyst in the exhaust passage to reduce one or more exhaust constituents; and an exhaust cooling device downstream from the exhaust emission aftertreatment device, the exhaust cooling device including a plurality of exhaust passageways in fluid communication with the exhaust passage to receive exhaust from the catalyst, the exhaust cooling device further including at least one coolant passageway around the plurality of exhaust passageways to receive a coolant to cool the exhaust, the exhaust passageways being in thermal contact with the coolant passageway.