Modelica.Thermal.FluidHeatFlow

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

Information

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
Austrian Institute of Technology, AIT
Giefinggasse 2
A-1210 Vienna, Austria

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 http://www.modelica.org/licenses/ModelicaLicense2.

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name Description

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

Name	Description
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

Automatically generated Fri Nov 12 16:31:41 2010.