Hafvik Solutions System / Package
HiMSEN Dual-Fuel Ammonia Engine
HiMSEN diesel-cycle dual-fuel ammonia engine, 320 mm bore, 720 rpm, 6–9 cylinders inline, 3.6–5.4 MW; type approval tests witnessed by ABS, BV, DNV, KR, LR, NK and RINA. Offered by Hafvik Solutions.
Description
The HiMSEN dual-fuel ammonia engine is a medium-speed engine for carbon-free marine propulsion and power, offered by Hafvik Solutions, which supports owners in evaluating and integrating ammonia propulsion. Hyundai Himsen completed Type Approval Tests for its two dual-fuel ammonia engines across 2024 and 2025, witnessed by ABS, Bureau Veritas, DNV, Korean Register, Lloyd's Register, Nippon Kaiji Kyokai and RINA.
Technical data
- Combustion: diesel cycle (high-pressure liquid injection)
- Bore / stroke: 320 mm / 450 mm
- Speed: 720 rpm
- Cylinder configuration: 6, 7, 8, 9 inline
- Cylinder output: 600 kW
- Engine output: 3.6–5.4 MW
Diesel cycle vs Otto cycle
- No output de-rating and high efficiency
- Low N2O and NH3 emissions (no blow-by or slip issues of Otto-cycle concepts)
- Relatively high NOx, handled by SCR
Specifications
| Combustion | Diesel cycle |
|---|---|
| Bore | 320 mm |
| Stroke | 450 mm |
| Speed | 720 rpm |
| Cyl. config. | 6, 7, 8, 9 (inline) |
| Cyl. output | 600 kW |
| Eng. output | 3.6 - 5.4 MW |
| Item | Diesel Cycle | Otto Cycle |
|---|---|---|
| Concept | High pressure & liquid injection | Low pressure & vapor injection |
| Output De-rating | None | Un-avoidable |
| Efficiency | High | Low |
| N2O emission | Low | High |
| NH3 emission | Low | High (Blow-by, Slip) |
| NOx emission | Relatively high (handled by SCR) | Relatively low |
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