8L21/31DF-GS-60Hz

In modern maritime operations, reliable power generation is crucial for ensuring smooth vessel operation and compliance with environmental standards. The 8L21/31DF-GS-60Hz, a high-performance dual-fuel engine from MAN Energy Solutions, delivers 1480 kW of power at 900 RPM, making it an ideal choice for a wide range of marine applications. This engine is designed to run on LNG and HFO, offering flexibility in fuel options while maintaining efficiency and reducing emissions. With a bore of 210 mm and a stroke of 310 mm, the 8L21/31DF-GS-60Hz features an L-shaped configuration and a 4-stroke cycle, ensuring robust performance and reliability. The genset output is rated at 1406 kW with a kVA rating of 1758, operating at a frequency of 60 Hz. The engine’s swept volume per cylinder is 10.74 liters, and it boasts a compression ratio of 15.5:1. Its maximum combustion pressure reaches 200 bar, and the specific fuel oil consumption ranges from 183 to 192 g/kWh, depending on load conditions. The turbocharging system is equipped with MAN TCR constant pressure technology, featuring jet assist and intercooling for enhanced performance. Common maintenance issues include piston ring stiction due to carbon deposits, cylinder liner scuffing from inadequate lubrication, exhaust valve deposits, water contamination in the fuel system, and turbocharger fouling. These areas require regular inspection and maintenance to ensure optimal engine operation and longevity. The 8L21/31DF-GS-60Hz is designed for active production, with over 290 million operational hours recorded across its legacy engines, making it a trusted choice for marine operators.