R717 Ammonia Refrigerant in Ross Dependency, Propeller Performance Optimization - Refrigeration Gases

R717 (Ammonia) is a natural refrigerant with zero ozone depletion potential (ODP) and low global warming potential (GWP). It is highly efficient and widely used in industrial refrigeration systems. Ammonia is toxic and flammable, requiring careful handling and specialized equipment.

Chemical Formula: NH3

Common Name: Ammonia (R717)

Molecular Weight: 17.03 g/mol

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

Density (Gas at 25°C, 1 atm): 0.696 kg/m³

Viscosity (Liquid at 25°C): 0.25 mPa·s

Viscosity (Gas at 25°C, 1 atm): 0.00982 mPa·s

Specific Heat Capacity (Liquid at 25°C): 4.70 kJ/kg·K

Specific Heat Capacity (Gas at 25°C, 1 atm): 2.06 kJ/kg·K

Thermal Conductivity (Liquid at 25°C): 0.50 W/m·K

Thermal Conductivity (Gas at 25°C, 1 atm): 0.0246 W/m·K

Buoyancy (Relative to Air): 0.59 (lighter than air)

Material Compatibility: Compatible with steel, stainless steel, aluminum; not compatible with copper, brass, zinc

Grade: Industrial/Refrigeration Grade (99.5%+ purity)

Common Cylinder Sizes: 30 kg, 50 kg, 100 kg, bulk storage tanks

ASHRAE Safety Classification: B2 (Moderately toxic, flammable)

Autoignition Temperature: 651°C (1204°F)

Ozone Depletion Potential (ODP): 0

Global Warming Potential (GWP): 0