R290
R290, also known as propane, is a hydrocarbon refrigerant gas used in small refrigeration systems such as domestic refrigerators and freezers.
R290, also known as propane, is a hydrocarbon refrigerant gas that is commonly used in small refrigeration systems, such as domestic refrigerators and freezers. It is a colorless, odorless gas that is non-toxic and has a low Global Warming Potential (GWP), making it an environmentally friendly alternative to some other refrigerants. Propane has a high cooling capacity and energy efficiency, which has made it a popular choice for domestic refrigeration systems. However, like R600a, it is highly flammable, which can be a safety concern if not handled properly. Despite this, R290 is widely adopted in some countries and regions as a replacement for older refrigerants with higher GWP.
General Information
- Propane
Linear Formula
- C3H8
Refrigerant Class
- HC
ASHRAE Number
- R-290
Substitutes
- R-600a (isobutane), R-1270 (propylene), R-441A
Physical Properties
- 44.1 g/mol
Boiling Point
- -42.1°C
Freezing Point
- -188.3°C
Critical Temperature
- 96.67°C
Vapor Pressure
- 7.9 MPa (25°C)
Vapor Density
- 1.53 (air = 1.0)
Relative Density
- 0.58 g/cm³ (liquid at 25°C)
Water Solubility
- 0.05 g/L (25°C)
Evaporation Rate
- 5.24 (n-butyl acetate = 1.0)
Environment
- Highly flammable
Flammability Range
- 2.1 – 10.1% (in air)
Flash Point
- -104°C (closed cup)
Global Warming Potential (GWP)
- 3
Ozone Depletion Potential (ODP)
- 0
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