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7L32/40

Main Engine 4-Stroke · Main Engines (4-Stroke)

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍​‌‍⁠​​‌‌‌‍‍‌‍‍‍‍
7Cylinders
320 mmBore
400 mmStroke

This is a four-stroke marine diesel engine. The MAN Energy Solutions 7L32/40 is a powerful engine, delivering 3150 kW of power at 720 rpm. It is a seven-cylinder engine with a bore of 320 mm and a stroke of 400 mm, resulting in a displacement of 32 liters per cylinder. The engine is designed to operate on a variety of fuels, including HFO, MDO, and MGO. It features two-stage turbocharging with intercooling and a two-stage charge air cooler (HT and LT circuits). The dry mass of the 7L32/40 engine is 38 tonnes. The engine is considered legacy, superseded by the L32/44CR series, but continues to serve on existing vessels.

Specifications

Technical data.reference — unverified

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Cylinder displacement32 L/cylinder
Power per cylinder500 kW/cyl
Mean Effective Pressure (MEP)25.9 bar (720 rpm) / 24.9 bar (750 rpm)
Mean piston speed9.6 m/s (720 rpm)
Specific fuel oil consumption (100% MCR)186 g/kWh
Specific fuel oil consumption (85% load)183 g/kWh
Lube oil consumption0.5 g/kWh
Dry mass (6L32/40)38 tonnes
Dry mass (8L32/40)47 tonnes
Dry mass (12V32/40)61 tonnes
Dry mass (18V32/40)85 tonnes
Compression ratio4.5
TurbochargingTwo-stage intercooling with advanced turbocharger
Charge air systemTwo-stage charge air cooler (HT and LT circuits)
Engine typeFour-stroke turbocharged Diesel, non-reversible (propulsion models)
Speed (rpm)720
Fuel TypeHFO/MDO
ConfigurationL
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