Marine HC Refrigerants:
- Type: Hydrocarbon (HC) based (e.g., R290, R600a)
- Size: Typically stored in cylinders (10kg to 50kg)
- Grade: High purity (≥99.5%)
- Viscosity: Low (similar to traditional refrigerants like R134a)
- Buoyancy: Lighter than air (may accumulate in enclosed spaces)
- Material Compatibility: Compatible with copper, aluminum, and steel (avoid elastomers prone to swelling)
- Flammability: Highly flammable (Class A3 safety rating)
- GWP: Very low (e.g., R290 GWP = 3)
Marine Refrigeration Systems:
- Size: Varies (small units for cabins to large containerized systems)
- Grade: Marine-grade (corrosion-resistant coatings)
- Viscosity: Depends on oil type (typically POE or PAG for HC systems)
- Buoyancy: N/A (system is fixed; refrigerant properties apply)
- Material: Stainless steel, copper-nickel alloys, or coated carbon steel
- Operating Pressure: Varies by refrigerant (e.g., R290: ~15-30 bar)
- Temperature Range: -40°C to +60°C (typical marine applications)