User manual

Dymola 2015 FD01 Release Notes 43
o Shaft is modeled as an inertia connected to a spring. It is built up using
MSL components.
• Rotors: Two rotor types are available, one corresponding to an inertia, and one
including connectors to generator rotor, stator and friction.
• Examples: Examples of turbo groups. Data records are included in the package.
Components that had equivalent components in Modelica Standard Library have been
replaced with those MSL components.
Flanges are named according to the standard in Modelica Standard Library.
The Mechanics.Translation package is now obsolete and will be removed in next release.
Enumerations extensively applied
The old integer versions of SourceType, IniType etc., have been replaced by enumerations.
A conversion script is needed for conversion.
3.6.5 Engine Dynamics Library
Version 1.2.2 is a minor update of the Engine Dynamics Library. Examples of
improvements:
• The simplified heat exchanger components based on efficiency (table based and eps-
NTU models) have been improved in that the maximum transferable heat is now
correctly computed from the enthalpy difference and flow rates of both sides.
Previously this assumed uniform specific heat capacity which in rare cases could result
in non-physical solutions.
• All user calibration factors for heat transfer and pressure drop has been converted from
parameters to inputs. Users may still assign them with fixed values in the parameter
dialog, but can now also use variable expressions to define calibration factors.
• Improved flexibility of discretized pipe models. The component can now be
configured to expose a flow or control volume behavior at the component boundaries.
Automatic conversion from Engine Dynamics library 1.2.1 is supported using the included
conversion script.
3.6.6 Fuel Cell Library
Version 1.3 is a major update of the Fuel Cell Library with new manifold structure for
modeling of complex stack configurations and new system example. In addition,
improvements of simulation speed and documentation has been made.
Major improvements:
• New manifold structure with support for both external and internal manifolds.
Predefined manifolds with inlet/outlet at the top, bottom or in the middle of the stack.
• Updated FullStack template to make use of the new manifold structure. The manifold
structure allows for modeling of different flow configurations: U-flow, Z-flow, Mid-
flow, equally distributed flows or combinations.