The world’s largest diesel engine - double acting two stroke engine

The world’s largest diesel engine; double-acting two-stroke engine is 24.5m long, 12.5m tall and it weights 1.400 tonnes and its located in Copenhagen. The diesel engine generates 15MW which corresponds to 22.500 effective horsepower. A special feature of the engine is that it is a double-acting two-stroke engine. This means that ignition takes place both when the piston is in its top position and when it is in its bottom position – a technology which is no longer in use. The engine works on diesel oil with a calorific value of approx. 10,000 kcal/kg. The diesel oil is injected into the cylinders with a pressure of approx. 350-400 bar. The fuel oil consumption is approx. 240 g per kWh at 12.000 kW. The scavenge air comes from four blowers, powered by the engine via a gear, with an output of approx. 1.800 m3 air per minute at a pressure of 0.25 bar. The exhaust gas temperature is 300 degrees at 12.000 kW. The bearings are pressure lubricated at a pressure of 2.5 bar. The 40 tons content of the lubricating oil tank is injected through the bearings as lubricating oil and through the pistons as cooling oil approx. 10 times an hour. The engine is freshwater cooled in a closed system which is cooled by water from the Copenhagen harbor. It is 24.5 m long, 12.5 m tall and weighs 1,400 tons. From this, the weight of 1 complete cylinder constitutes 20 tons, the weight of one opposed piston with 10 piston rings constitutes 4.5 tons, the weight of the 730 mm thick crankshaft constitutes 140 tons and the weight of the turning wheel 80 tons. Source: http://www.dieselhouse.dk/en/h-c-orsted-engine/

Comments

1. Damn. It is big, double acting and two stroke. Everything a diesel should be! It may be the biggest, but it is not the most powerful. That belongs to an engine which powers the largest container ships, like the Emma Maersk. It generates about 4x the horsepower this mammoth does.