Converting a more complex model

Converting a complex model

In this example we will look at the conversion of a more complex model.

Figure 11: A more complex model

In this case there is a much larger number of Hydraulic submodels to convert:

Figure 12: Model converter for complex model

There are 60 submodels to convert. Here we will display some of them before and after conversion.

Before conversion	After conversion

Conversion impossible

In some cases, the tool is unable to perform the conversion, for example when a submodel does not have an equivalent in the Thermal Hydraulic library. In this case, it is up to the user to remove that submodel manually and insert the corresponding Thermal Hydraulic submodel. The Conversion information field proposes a suitable replacement:

Figure 13: Model that cannot be fully converted

When we run the conversion, all other submodels are updated, but we will have to replace the hr_jf_mod_bearing_mec icon with the hr_jf_pet_mod_bearing_mec icon from the Thermal Hydraulic Resistance library, and then select the TFBEAPET31 submodel.

Converting Fluid Property icons

Depending on the fluid properties type chosen in the FP04 submodel, the hydraulic assumption is either isothermal or adiabatic (for example in the Robert Bosch adiabatic Diesel case). Therefore the Model Converter will retain this assumption during the conversion, and set the corresponding thermal hydraulic assumption (isothermal or isentropic):

Figure 14: Assumption levels

To activate the thermal computations, use the full energy balance option.

For most parameter settings, the tool can convert from FP04 to TFFD04 and conserve the parameter settings. If the user has selected advanced using tables in conjunction with user data files, the file format used in the FP04 submodel cannot be read by TFFD04. The submodel will be converted, but an equivalent set of parameters cannot be recovered. In this case the user should generate compatible thermal hydraulic data using the Media Property Assistant.

Figure 15: Media Property Assistant

After the conversion, it will not be possible to open the Media Property Assistant. In the Simcenter Amesim database (parameterreference database), select the most similar fluid. For example, if you are working with jet fuel, you can launch the Media Property Assistant having selected one of the jet fluid data options:

Figure 16: Launching the Media Property Assistant

Once the Media Property Assistant is open, the user can fill in the different spreadsheets with his former hydraulic measurements (density, bulk modulus, and viscosity). The specific heat (Cp) and thermal conductivity (lambda) should be given. If these two values are unknown, the user can leave the default values from the previously-selected fluid. Then the media property file can be generated and applied to the fluid submodel TFFD04.

Note

The "simplest" Hydraulic property type does not have a strict equivalent in the Thermal Hydraulic Library.