Fitting
Thermal conductivity
| Symbol | Definition | Unit |
| T refC | Thermal conductivity reference temperature | °C |
| K ref | Thermal conductivity at T refC | W/K/m |
| a | Thermal conductivity first order temperature coefficient at T refC | K-1 |
| b | Thermal conductivity second order temperature coefficient at T refC | K-2 |
Note: The model does not consider any variation of the gas thermal
conductivity in function with the gas pressure.