⚠ HYDROGEN EMBRITTLEMENT ALERT — MATERIAL INTEGRITY RISK — INSPECT PRESSURE LINES BEFORE RESTART ⚠
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
Engine / Propulsion Mode
FUEL CELL — H₂ ACTIVE
Power Output
68.2 %
P&ID SCHEMATIC — H₂ FUEL SUPPLY SYSTEM (IGF Code)
FIRE & GAS / ALARM MANAGEMENT
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
FUEL PIPELINES — P&ID
PIPELINE LINEUP
BUNKERING MANIFOLD — H₂ SHIP-TO-SHORE CONNECTION
MANIFOLD CONTROLS
H₂ FUEL STORAGE — COMPRESSED / LH₂ TANK
TANK CONTROLS
TEMPERATURE MONITORING — CRYOGENIC / INSULATION SPACES
FIXED H₂ GAS DETECTION SYSTEM — CEILING LEVEL
DETECTOR CONTROLS
PORTABLE GAS DETECTION INSTRUMENTS
FUEL CELL SYSTEM — PEMFC STACK (per MSC.1/Circ.1647)
FUEL CELL CONTROLS
LH₂ VAPORISER — HEAT EXCHANGE SYSTEM
VAPORISER CONTROLS
NITROGEN GENERATION & SUPPLY
N₂ CONTROLS
NITROGEN DISTRIBUTION — PRESSURISATION & PURGE
SHORE / SUPPLY PIPELINES
SHORE PIPELINE CONTROLS
SHORE H₂ STORAGE — COMPRESSED / LH₂ TANK
SHORE EQUIPMENT OVERVIEW
EQUIPMENT CONTROLS

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