Modelica.Fluid.Examples.AST_BatchPlant.BaseClasses

Information

Package Content

Name	Description
setReal	Set output signal to a time varying Real expression
TankWith3InletOutletArraysWithEvaporatorCondensor	Tank with Heating and Evaporation
InnerTank
Controller
ControllerUtilities
Init	Enumeration to define initialization options
TankWithTopPorts	Tank with inlet/outlet ports and with inlet ports at the top

Modelica.Fluid.Examples.AST_BatchPlant.BaseClasses.setReal

Information

Parameters

Name	Description
Time varying input signal
u	Set value of Real input

Connectors

Name	Description
Time varying input signal
u	Set value of Real input

Modelica.Fluid.Examples.AST_BatchPlant.BaseClasses.TankWith3InletOutletArraysWithEvaporatorCondensor

Information

This tank has the same geometric variables as TankWith3InletOutletArrays plus the feature of a HeatPort and the possibility of evaporation. (Assumption: The gas is condensed immediately afterwards so that a liquid boiling fluid is created.)

The tank can be initialized with the following options:

• GuessValues: no explicit initial conditions
• InitialValues: initial values of temperature (or specific enthalpy), composition and level are specified
• SteadyStateHydraulic: initial values of temperature (or specific enthalpy) and composition are specified; the initial level is determined so that levels and pressure are at steady state.

Full steady state initialization is not supported, because the corresponding initial equations for temperature/enthalpy are undetermined (the flow rate through the port at steady state is zero).

Parameters

Name	Description
replaceable package Medium	Medium in the component
crossArea	Tank area [m2]
top_pipeArea[n_TopPorts]	Area of outlet pipe [m2]
side_pipeArea[n_SidePorts]	Area of outlet pipe [m2]
bottom_pipeArea[n_BottomPorts]	Area of outlet pipe [m2]
height	Height of Tank [m]
V0	Volume of the liquid when the level is zero [m3]
side_heights[n_SidePorts]
bottom_heights[n_BottomPorts]
top_heights[n_TopPorts]
p_ambient	Tank surface pressure [Pa]
T_ambient	Tank surface Temperature [K]
n_TopPorts	number of Top connectors
n_SidePorts	number of side connectors
n_BottomPorts	number of bottom connectors
min_level_for_heating
Initialization
level_start	Initial tank level [m]
initType	Initialization option
use_T_start	Use T_start if true, otherwise h_start
T_start	Start value of temperature [K]
h_start	Start value of specific enthalpy [J/kg]
X_start[Medium.nX]	Start value of mass fractions m_i/m [kg/kg]
Assumptions
Heat transfer
replaceable model HeatTransfer	Wall heat transfer

Connectors

Name	Description
replaceable package Medium	Medium in the component
BottomFluidPort[n_BottomPorts]
TopFluidPort[n_TopPorts]
SideFluidPort[n_SidePorts]
Condensed
heatPort
Assumptions
Heat transfer
replaceable model HeatTransfer	Wall heat transfer

Modelica.Fluid.Examples.AST_BatchPlant.BaseClasses.InnerTank

Parameters

Name	Description
replaceable package Medium	Medium in the component
Xi[Medium.nXi]	Actual mass fractions of fluid in tank [kg/kg]

Connectors

Name	Description
replaceable package Medium	Medium in the component
port

Modelica.Fluid.Examples.AST_BatchPlant.BaseClasses.Controller

Parameters

Name	Description
w_dilution
w_concentrate
startTime
T5_batch_level

Connectors

Name	Description
sensors
actuators

Modelica.Fluid.Examples.AST_BatchPlant.BaseClasses.Init

Information

Integer type that can have the following values (to be selected via choices menu):

Modelica.Fluid.Examples.AST_BatchPlant.BaseClasses.TankWithTopPorts

Information

Model of a tank that is open to the environment at the fixed pressure p_ambient. The tank is filled with a single or multiple-substance liquid, assumed to have uniform temperature and mass fractions.

At the top of the tank over the maximal fill level height a vector of FluidPorts, called topPorts, is present. The assumption is made that fluid flows always in to the tank via these ports (and never back in to the connector).

The vector of connectors ports are fluid ports at the bottom and side of the tank at a definable height. Fluid can flow either out of or in to this port. The fluid level of the tank may be below one of these ports. This case is approximated by introducing a large pressure flow coefficient so that the mass flow rate through this port is very small in this case.

If the tank starts to over flow (i.e., level > height), an assertion is triggered.

When the diagram layer is open in the plot environment, the level of the tank is dynamically visualized. Note, the speed of the diagram animation in Dymola can be set via command animationSpeed(), e.g., animationSpeed(speed = 10)

Parameters

Name	Description
height	Maximum level of tank before it overflows [m]
crossArea	Area of tank [m2]
V0	Volume of the liquid when level = 0 [m3]
replaceable package Medium	Medium in the component
fluidVolume	Volume [m3]
portsData[nPorts]	Data of inlet/outlet ports at side and bottom of tank
Assumptions
Ambient
p_ambient	Tank surface pressure [Pa]
T_ambient	Tank surface Temperature [K]
Dynamics
energyDynamics	Formulation of energy balance
massDynamics	Formulation of mass balance
Heat transfer
use_HeatTransfer	= true to use the HeatTransfer model
replaceable model HeatTransfer	Wall heat transfer
Initialization
level_start	Start value of tank level [m]
p_start	Start value of pressure [Pa]
use_T_start	= true, use T_start, otherwise h_start
T_start	Start value of temperature [K]
h_start	Start value of specific enthalpy [J/kg]
X_start[Medium.nX]	Start value of mass fractions m_i/m [kg/kg]
C_start[Medium.nC]	Start value of trace substances
Advanced
Port properties
hysteresisFactor	Hysteresis for empty pipe = diameter*hysteresisFactor
stiffCharacteristicForEmptyPort	=true, if steep pressure loss characteristic for empty pipe port
zetaLarge	Large pressure loss factor if mass flows out of empty pipe port
m_flow_small	Regularization range at zero mass flow rate [kg/s]

Connectors

Name	Description
topPorts[nTopPorts]	Inlet ports over height at top of tank (fluid flows only from the port in to the tank)
ports[nPorts]	inlet/outlet ports at bottom or side of tank (fluid flows in to or out of port; a port might be above the fluid level)
heatPort
Assumptions
Heat transfer
replaceable model HeatTransfer	Wall heat transfer