OceanSphereENGINES

9L H21/32

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

Technical data from manufacturer or class sources · not yet verified by a person​​‍‌‌‌​‌‍​​‍​‌‍⁠‌‍⁠‌
9Cylinders
210 mmBore
320 mmStroke
900 rpmMCR RPM

The crew and engineers on board maritime vessels rely on robust auxiliary engines like the HiMSEN 9L H21/32 to ensure reliable power generation and equipment operation. This 4-stroke engine is designed to deliver a maximum continuous rating of 3060 kW at 900 RPM, making it a dependable choice for a variety of marine applications. The engine boasts a compact and cost-effective design, optimized for both performance and durability. With a bore of 210 mm and a stroke of 320 mm, it features notable attributes such as in-house HHI production and compliance with IMO Tier II emissions standards. The engine supports fuel types such as MDO and MGO, ensuring flexibility in operational conditions. Maintenance is critical, with common issues including piston cooling nozzle blockages, crankcase oil mist build-up, exhaust valve seat erosion, and fuel injection nozzle coking, all of which require vigilant monitoring and timely intervention.

Specifications

Technical data.reference — unverified

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Compression ratio17:1
Stroke/Bore ratio1.52 (320/210)
Max combustion pressure200 bar
SFOC at 100% MCR182-187 g/kWh (720-1000 rpm)
Lubricating oil consumption0.6 g/kWh
Dry weight (5H21/32)13.4 tons
Dry weight (6H21/32)15.1 tons
Dry weight (7H21/32)16.7 tons
Dry weight (8H21/32)18.4 tons
Dry weight (9H21/32)19.8 tons
Power per cylinder160-210 kW/cyl (depending on speed)
Injection pressure2000 bar maximum
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