Auxiliary Engine (Generator Set) · Auxiliary Engines
The MAN Energy Solutions 9L21/31DF-GS-60Hz is a marine diesel engine designed for high-performance applications in maritime vessels. This engine is part of the 21/31DF-GS family and is capable of delivering 1665 kW of power at 900 rpm. It operates on a dual-fuel system, running on both LNG and HFO, and is optimized for efficiency with a power-to-weight ratio ranging from 18.4 to 22.5 kg/kW. The engine features a turbocharging system with MAN TCR constant pressure technology, intercooling, and jet assist, ensuring optimal performance and emission compliance with IMO Tier II and Tier III standards when equipped with MAN SCR. Potential common failures include piston ring stiction and breakage due to carbon deposits in grooves, inadequate lubrication leading to cylinder liner scuffing and wear, exhaust valve deposits and carbon buildup, water contamination in the fuel system, and turbocharger fouling and excessive play.
Every value below comes from the manufacturer datasheet or class-society record on file for this model.
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