This package provides thermodynamic property models for use with Modia and other Julia packages. The initial goal is to achieve a similar functionality as Modelica.Media, the standard media library for Modelica models, but with improvements based on Julia features such as multiple dispatch.
This package is under development and it is planned to provide all thermodynamic property models from Modelica.Media in this package.
This package is currently under development and is not yet registered in METADATA. Julia 1.0 is required. Installation is performed via:
julia> ]add https://github.com/ModiaSim/ModiaMedia.jl
ModiaMedia uses PyPlot for plotting (via ModiaMath.plot).
PyPlot is not available in your current Julia environment
an information message is printed and all
plot(..) calls are ignored.
In order that plot windows are displayed, you need to add
PyPlot to your current environment
]add PyPlot. Often this automatic installation fails and it is recommended to follow
Installing PyPlot in a robust way.
using ModiaMedia # Define thermodynamic property model to be used Medium = getMedium("N2"); # Define the operating point where the medium shall be evaluated. p = 1e5 # in [Pa] T = 300.0 # in [K] # Set the medium-specific thermodynamic state from p and T # (could be also set from p,h, or p,s, or d,T, or # p,T,X, or p,h,X, or p,s,X, or d,T,X) state = setState_pT(Medium, p, T) # Update a state object with new values setState_pT!(state, p, T) # Call media functions (here to compute density and specific enthalpy) d = density(state) h = specificEnthalpy(state) # Print computed values println("data for p=$p, T=$T:") println("density = ", d) println("specificEnthalpy = ", h) # List the available media listMedia() # Plot the most important characteristics of the medium standardPlot(Medium)
The last command results in the following plot:
The ModiaMedia package development has just started and a lot has to be improved.
- Martin Otter (DLR - Institute of System Dynamics and Control)
- Hilding Elmqvist (Mogram),
- Chris Laughman (MERL).
- All the content of ModiaMedia is based on Modelica.Media which was and is developed from many people.
License: MIT (expat)