WOLFRAM SYSTEMMODELER

FluidHeatFlow

Simple components for 1-dimensional incompressible thermo-fluid flow models

Package Contents

UsersGuide

User's Guide

Examples

Examples that demonstrate the usage of the FluidHeatFlow components

Components

Basic components (pipes, valves)

Media

Medium properties

Sensors

Ideal sensors to measure port properties

Sources

Ideal fluid sources, e.g., ambient, volume flow

Interfaces

Connectors and partial models

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

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 = cpconstant * 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 difference 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)

Copyright © 1998-2016, Modelica Association, Anton Haumer, Christian Kral and AIT.

This Modelica package is free software and the use is completely at your own risk; it can be redistributed and/or modified under the terms of the Modelica License 2. For license conditions (including the disclaimer of warranty) see Modelica.UsersGuide.ModelicaLicense2 or visit https://www.modelica.org/licenses/ModelicaLicense2.