Toshiba

Phase 1: Outfitting and Modification (5 days in port)
Removal of old components → Installation of corrosion-resistant brackets → Deployment of maritime-grade EEVs and sensors
Phase 2: Sea trials (12 voyages)
1. Refrigerated compartment: Calibration of temperature control curve (±0.4°C stability test)
2. Processing area: Verification of quenching system efficiency (5.8°C/min standard achieved)
3. Living area: Air conditioning wide voltage test (±20% voltage fluctuation simulation)
Phase 3: Intelligent Operations and Maintenance
Satellite IoT Platform: Remote Diagnosis + Fault Warning (Supported by Iridium Communications)
Predictive Maintenance: Preemptive Replacement of Capacitors Based on Capacity Decline Trends

Maritime Standards: Complies with the ABS "Guidelines for Ship Refrigeration Systems" (2023 Edition)
Environmental Standards:
Refrigerant R513A (GWP = 573) replaces R404A
Carbon footprint reduced by 62 tons/year (equivalent to 1,400 trees)
Safety Certifications: UL Marine Type 1 Waterproof Certification + DNV-GL Seismic Testing

Marine-Grade EEV & Coils:
Technical Notes:Model: Danfoss ETS M2 (IP68 protection, 1000 hours salt spray resistance)
Function:
- Dynamic flow compensation based on vessel inclination (flow fluctuation <5% under ±15° pitch)
- Polyamide coil encapsulation for moisture and vibration resistance
Application: Refrigerated tank evaporation circuit (independent EEV per tank + dual sensor redundancy)
Corrosion-Resistant Motors & Contactors:
Motor: Siemens 1LE8 Marine (IE5 energy efficiency, epoxy coating, IP66 protection)
Contactor: ABB AF26-30 (silver-nickel contacts, arc oxidation resistance, mechanical life of 2 million cycles)
Control Logic:
- Automatic load reduction based on wave level (power reduction by 30% for waves >4m)
- Soft start with integrated reverse power protection (prevents generator overload)

Ship Adaptive Control System:
Technical Notes:
Architecture:
- Main PLC (Siemens S7-1500 Marine) with integrated IMU sensor (roll/pitch monitoring)
- Redundant relays (Omron G7L-Marine) ensure seamless failover
Algorithm:
- Predicts cooling load fluctuations based on vessel attitude and pre-adjusts compressor speed
- Activates dual-stage cooling mode (5.8°C/min rapid cooling) during peak catch storage hours
Seawater Heat Recovery Module:
Components: Titanium plate heat exchanger (seawater corrosion resistant) + variable frequency water pump
Energy-saving mechanism:
- Using seawater (4-15°C) to pre-cool the condenser, reducing the condensing temperature by 10°C in summer.
- Annual electricity savings of $15,200 (for tropical waters)

Polar Operations:
Low-Temperature Cold Start:
- Compressor crankcase heater (normal start at -30°C)
- Low-Temperature Lubricant (ISO VG 22 synthetic oil)
De-Icing Mode:
Condenser automatic backflush (prevents fin icing)