FluidHeatFlow

This package contains very simple-to-use components to model coolant flows as needed to simulate cooling e.g. of electric machines:

• Components: components like different types of pipe models
• Examples: some test examples
• Interfaces: definition of connectors and partial models (containing the core thermodynamic equations)
• Media: definition of media properties
• Sensors: various sensors for pressure, temperature, volume and enthalpy flow
• Sources: various flow sources

Variables used in connectors:

• Pressure p
• flow MassFlowRate m_flow
• SpecificEnthalpy h
• flow EnthalpyFlowRate H_flow

EnthalpyFlowRate means the Enthalpy = cp_constant * m * T that is carried by the medium's flow.

Limitations and assumptions:

• Splitting and mixing of coolant flows (media with the same cp) is possible.
• Reversing the direction of flow is possible.
• The medium is considered to be incompressible.
• No mixtures of media is taken into consideration.
• The medium may not change its phase.
• Medium properties are kept constant.
• Pressure changes are only due to pressure drop and geodetic height differnence rho*g*h (if h > 0).
• A user-defined part (0..1) of the friction losses (V_flow*dp) are fed to the medium.
• Note: Connected flowPorts have the same temperature (mixing temperature)!
  Since mixing may occur, the outlet temperature may be different from the connector's temperature.
  Outlet temperature is defined by variable T of the corresponding component.

Further development:

• Additional components like tanks (if needed)

Main Authors:

Anton Haumer
Technical Consulting & Electrical Engineering
A-3423 St.Andrae-Woerdern, Austria
email: a.haumer@haumer.at

Dr.Christian Kral
Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H.
arsenal research
Giefinggasse 2
A-1210 Vienna, Austria

Copyright © 1998-2009, Modelica Association, Anton Haumer and arsenal research.

The Modelica package is free software; it can be redistributed and/or modified under the terms of the Modelica license, see the license conditions and the accompanying disclaimer here.