Thermal Fluid Two Port
Define the base-equations shared by thermal-fluid two-port components
Modelica Standard Library
A Thermal-Fluid Two-Port is the base model shared by many of the thermal-fluid components. It has two thermal-fluid ports, a and b.
The following equations are the base equations for the two-port model. Each component based on this model extends these equations.
Mass does not accumulate in the component.
The power flow into the device equals the rate of energy increase of the mass. If the mass is essentially zero, this is set to exactly zero.
The flow of enthalpy into each port depends on the direction of the mass flow through the component.
The temperature at a port is computed from the specific enthalpy at the port and the specific heat capacity of the medium.
The volume flow is given by the mass-flow into port a and the density of the medium.
The pressure drop from port a to port b is
Thermal-Fluid flow port
Pressure drop from a to b
Pressure at port x
Temperature at port x
Temperature increase of fluid, in direction of flow
Temperature used for heat exchange with the ambient
Heat exchange with ambient
Volume flow from from port a to port b
Specific enthalpy of medium
Specific enthalpy of flow at port x
Enthalpy flow rate into port x
Density of medium
Specific heat capacity of medium at constant pressure
Specific heat capacity of medium at constant volume
The symbol x stands for a or b, it indicates one of the ports.
Mass of medium in component
A very small number
The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.
Thermal Fluid Media
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