Hello,

i started to build up a simple model in Dymola with two tanks and one pipe in between. When i choose "simple natural gas" as a medium i can run the simulation and everythink works fine.
But for my whole project i need also to run the natural gas in a liquified phase, which means that the temperature is about -162°celsius. If the ambient temperature is like this, an error occurs in the simulation mode:

... "dsin.txt" loading (dymosim input file)
tank.medium.T >= 200 and tank.medium.T <= 6000
The following error was detected at time: 0

Temperature T (=173.15 K = 200 K) is not in the allowed range
200 K <= T <= 6000 K
required from medium model "SimpleNaturalGas".
Error: Failed to start model.

- Does anyone know how to handle the natural gas within an temperature range from -162°C to +40°C?
- are there any other opportunities? e.g. using Look-Up-tables with pV-,ph- and T,s- diagrams?
- Is it possible to do such simulation (vaporizing gas) in Dymola or is it recommended to use another software for it?

When i use another medium, e.g. CH4 (methane) the same problem appears.

Thanks a lot for any hints and comments!
Regards, Jesper Renz