H₂ FUEL SYSTEM
Storage Mode
TYPE IV COMPRESSED — 350 bar
Or LH₂ at −253°C (vessel dependent)
Fuel Cell Stack (per MSC.1/Circ.1647)
PEMFC OUTPUT
480 kW
Efficiency: 55% · Exhaust: H₂O only
Valve Status
NON-RETURN VALVES
Engine / Propulsion Mode
FUEL CELL — H₂ ACTIVE
Power Output
68.2 %
P&ID — H₂ FUEL SYSTEM (IMO CCC 11 / MSC.1/Circ.1647)
FIRE & GAS / AMS
ESD → HP valve close · Fuel cell purge · Battery backup
GAS DETECTION — % LEL (H₂ LEL = 4% vol)
SCENARIO / TREND
NORMAL OPERATIONS
H₂ fuel cell propulsion. Compressed H₂ at 350 bar. H₂ rises — ceiling detectors. Odourless gas — no smell warning.
H₂ UNIQUE HAZARDS
Embrittlement Monitor
NORMAL — No material degradation
H₂ embrittles carbon steel — all piping must be austenitic SS / Inconel
Critical Properties
Detector Placement
H₂ is lightest gas — rises instantly. Detectors at CEILING LEVEL only.
Ventilation (30 ACH fuel cell room)
NORMAL — 30 ACH