User manual

Dymola 2015 Release Notes 39
3.9.16 Vapor Cycle Library
Version 1.1 is a major release of the Vapor Cycle Library.
In particular, new components have been added, some examples:
• A pump model with several different options for defining flow and power
characteristics.
• A turbine model with flow rate determined according to the Stodola law and a given
nominal operating point. Constant isentropic and mechanical efficiency are assumed.
• Splits and junctions with different options to define the flow resistance.
• A working fluid flow source which may be used to remove or add charge in a closed
cycle according to a given setpoint.
• A multi-port volume, the number of ports is automatically adapted to the number of
connections to this component.
• An interface to the NIST REFPROP data base.
Existing models can be converted to the current version using the supplied conversion
script.
3.9.17 Vehicle Dynamics Library
Version 1.9 is a major maintenance release with many changes to the Wheels interface and
templates. Some changes are described below.
Support for TYDEX Tyre Interface Tire Models
The Standard Tyre Interface (STI) was defined by the TYDEX working group. The existing
built-in tire models in Vehicle Dynamics Library have separate blocks for calculating forces
and contact (tire/ground interaction). For STI-compatible tire models, the forces and contact
calculations are combined. Further, the Vehicle Dynamics Library tire models calculate the
tire forces at the contact patch, and the hub model is responsible for transforming those
forces for application at the hub. STI-compatible tire models calculate the forces at the hub.
New Wheel Interface and Templates
The fundamental difference between the Vehicle Dynamics Library tire models and STI-
compatible tire models mean that the existing templates for wheels, forces, hubs, and
contact calculations in the Vehicle Dynamics Library could not be used. The Vehicle
Dynamics Library has now been extended to support STI-compatible tire models that
calculate the forces at the hub by adding new wheel, forces, and hub interfaces and
templates.
Support for the Delft-Tyre family of tire models
The Vehicle Dynamics Library has been extended to include support for the TNO Delft-
Tyre product line which includes MF-Tyre and MF-Swift tire force models. The Delft-Tyre
wheel model fully supports Vehicle Dynamics Library built-in ground models, TNO road
property files, and OpenCRG road descriptions.