Provides the general data and functions that are common to several media packages.
DataRecord and associated packages
The DataRecord record in the MediaCommon package defines the container for the individual substance data. This data will be used later by the media packages written directly in Modelica language: LMedia and TMedia. It contains basic data regarding the substance: name, description, CAS, chemical family,...and correlations for several physical properties, normally as function of temperature. Each correlation has: equation to use for its calculation, coefficients, and limits of usage.
The data for each individual fluid is inside the subpackages: MediaDataAL, and MediaDataMZ. Each data is defined as a constant DataRecord, with the name of the substance.
You can create a new record, in those subpackages, copying the MediaDataTemplate (it is inside the MediaCommon package) and filling it manually. Nevertheless the faster and more convenient way is to create the record from the FreeFluidsGui program. You need to select the substance from the database, select the correlations you want to be included in the record, and export it in Modelica format. You can put the file in any place, better with the .txt extension. Later you edit the file, copy its content, and paste it inside the MediaData package. You still need to declare the substance inside the Media packages, filling the name and the origin of the data, that will be the record you just copied.
When using the data in the TMedia package, you will need at least the following correlations: saturated density, vapor pressure, liquid heat capacity. Plus vaporization enthalpy and saturated gas density, if you want to work also with the gas phase. Transport properties correlations as for your needs, and reduced liquid bulk modulus if you want to work at high pressures (till 200 bars). If you want to force the liquid state you can set Tc at a high value, and Pc at a low value (look as example to the MarlothermSH medium), but is better to use LMedia package.
| Name | Description |
|---|---|
| DataRecord | |
| Types | |
| Functions | Contains the functions that could be common to several media packages |
| MediaDataAL | MediaDataAL.mo by Carlos Trujillo This file is part of the Free Fluids application Copyright (C) 2008-2021 Carlos Trujillo Gonzalez This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 3 as published by the Free Software Foundation This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| MediaDataMZ | MediaDataMZ.mo by Carlos Trujillo This file is part of the Free Fluids application Copyright (C) 2008-2021 Carlos Trujillo Gonzalez This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 3 as published by the Free Software Foundation This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |