Key specifications and technical properties of Marine R717 Ammonia Refrigeration Systems:
Refrigerant (R717 - Ammonia):
- Chemical Formula: NH3
- Grade: Industrial/Refrigeration Grade (99.98% purity)
- Boiling Point: -33.34°C (-28.01°F) at 1 atm
- Critical Temperature: 132.4°C (270.3°F)
- Critical Pressure: 11.33 MPa (113.3 bar)
- Density (Liquid at 25°C): 682 kg/m³
- Viscosity (Liquid at 25°C): 0.25 mPa·s
- Buoyancy: Lighter than air (vapor density ~0.59 relative to air)
- Material Compatibility: Carbon steel, stainless steel, aluminum (avoid copper, brass, zinc)
System Specifications:
- Operating Pressure Range: 0.1 MPa to 2.5 MPa (1 to 25 bar)
- Typical Pipe Sizes: 1/2" to 12" (DN15 to DN300)
- Evaporator Types: Shell-and-tube, plate, or air-cooled
- Compressor Types: Reciprocating, screw, or centrifugal
- Material for Piping/Components: Carbon steel (ASTM A106/A53), stainless steel (ASTM A312)
- Oil Compatibility: Mineral or synthetic oils (separator required)
- Safety Class: B2L (flammable, low toxicity)
Marine-Specific Properties:
- Corrosion Resistance: Requires coatings in saltwater environments
- System Capacity Range: 10 kW to 10 MW (depending on vessel size)
- Leak Detection: NH3 sensors (20-50 ppm threshold)
- Environmental Impact: ODP = 0, GWP = 0
