Main Engine 4-Stroke · Main Engines (4-Stroke)
Medium-speed engines like the Wärtsilä 5LW38B are commonly found in marine vessels requiring reliable power generation, especially in cargo ships and offshore vessels. This engine has a power output of 2600 kW at 600 rpm and operates on heavy fuel oil (HFO) or marine diesel oil (MDO). It features a bore of 380 mm and a stroke of 475 mm, with a mean effective pressure of 2.7 MPa and a mean piston speed of 9.5 m/s. Each cylinder generates between 660 kW and 725 kW, and the engine has a total of five cylinders arranged in a V configuration. Common maintenance issues include cold corrosion of cylinder liners due to sulfuric acid formation, wear and degradation of cylinder liners and piston rings, and the need for regular turbocharger overhauls every 50,000 operating hours. Additionally, exhaust valve seat recession, shaft seal wear, and main bearing wear can also affect performance over time. Despite being a legacy model, Wärtsilä continues to provide support and upgrade packages for in-service units.
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