14V21/31DF

The MAN 14V21/31DF engine operates on a dual-fuel concept, capable of running on both LNG and Heavy Fuel Oil (HFO), making it versatile for various maritime applications. This 4-stroke engine features a V-configuration with 14 cylinders, each with a bore of 210 mm and a stroke of 310 mm, delivering a total power output of 2590 kW at 1000 rpm. The engine's swept volume per cylinder is 10.74 liters, and it operates with a compression ratio of 15.5:1, achieving a maximum combustion pressure of 200 bar. The MAN TCR constant pressure turbocharging system with Jet Assist and intercooling ensures efficient performance. The Specific Fuel Oil Consumption (SFOC) ranges from 183 g/kWh at 85% load to 189-192 g/kWh depending on the configuration, while the Specific Lubrication Oil Consumption is less than 0.8 g/kWh. Common maintenance issues include piston ring stiction and breakage due to carbon deposits, cylinder liner wear from inadequate lubrication, and exhaust valve carbon buildup, which can be mitigated by following manufacturer guidelines.