Marine R717 (Ammonia) refrigerant is a natural, efficient, and environmentally friendly option for industrial refrigeration systems.

It offers high energy efficiency and excellent thermodynamic properties, making it ideal for large-scale marine and commercial applications.

However, it requires careful handling due to its toxicity and flammability, necessitating robust system design and safety measures.

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