Ambient
AbsolutePressure
VolumeFlow
PressureIncrease
IdealPump
Ideal fluid sources, e.g., ambient, volume flow
This package contains different types of sources:
Thermodynamic equations are defined in partial models (package BaseClasses). All fans / pumps are considered without losses, they do not change enthalpy flow.
Extends from Modelica.Icons.SourcesPackage (Icon for packages containing sources).
| Name | Description |
|---|---|
| Ambient
|
Ambient with constant properties |
| AbsolutePressure
|
Defines absolute pressure level |
| VolumeFlow
|
Enforces constant volume flow |
| PressureIncrease
|
Enforces constant pressure increase |
| IdealPump
|
Model of an ideal pump |
Modelica.Thermal.FluidHeatFlow.Sources.AmbientAmbient with constant properties
(Infinite) ambient with constant pressure and temperature.
Thermodynamic equations are defined by BaseClasses.SinglePortLeft.
Extends from FluidHeatFlow.BaseClasses.SinglePortLeft (Partial model of a single port at the left).
| Name | Description |
|---|---|
| medium | Medium |
| T0 | Initial temperature of medium [K] |
| T0fixed | Initial temperature guess value or fixed |
| usePressureInput | Enable / disable pressure input |
| constantAmbientPressure | Ambient pressure [Pa] |
| useTemperatureInput | Enable / disable temperature input |
| constantAmbientTemperature | Ambient temperature [K] |
| Name | Description |
|---|---|
| flowPort | |
| ambientPressure | |
| ambientTemperature |
Modelica.Thermal.FluidHeatFlow.Sources.AbsolutePressureDefines absolute pressure level
AbsolutePressure to define pressure level of a closed cooling cycle.
Coolant's mass flow, temperature and enthalpy flow are not affected.
Extends from FluidHeatFlow.BaseClasses.SinglePortLeft (Partial model of a single port at the left).
| Name | Description |
|---|---|
| medium | Medium |
| T0 | Initial temperature of medium [K] |
| T0fixed | Initial temperature guess value or fixed |
| p | Pressure ground [Pa] |
| Name | Description |
|---|---|
| flowPort |
Modelica.Thermal.FluidHeatFlow.Sources.VolumeFlowEnforces constant volume flow
Fan resp. pump with constant volume flow rate. Pressure increase is the response of the whole system.
Coolant's temperature and enthalpy flow are not affected.
Setting parameter m (mass of medium within fan/pump) to zero leads to neglect of temperature transient cv*m*der(T).
Thermodynamic equations are defined by BaseClasses.TwoPort.
Extends from FluidHeatFlow.BaseClasses.TwoPort (Partial model of two port).
| Name | Description |
|---|---|
| medium | Medium in the component |
| m | Mass of medium [kg] |
| T0 | Initial temperature of medium [K] |
| T0fixed | Initial temperature guess value or fixed |
| tapT | Defines temperature of heatPort between inlet and outlet temperature |
| useVolumeFlowInput | Enable / disable volume flow input |
| constantVolumeFlow | Volume flow rate [m3/s] |
| Initialization | |
| V_flow | Volume flow a->b [m3/s] |
| Name | Description |
|---|---|
| flowPort_a | |
| flowPort_b | |
| volumeFlow | [m3/s] |
Modelica.Thermal.FluidHeatFlow.Sources.PressureIncreaseEnforces constant pressure increase
Fan resp. pump with constant pressure increase. Mass resp. volume flow is the response of the whole system.
Coolant's temperature and enthalpy flow are not affected.
Setting parameter m (mass of medium within fan/pump) to zero leads to neglect of temperature transient cv*m*der(T).
Thermodynamic equations are defined by BaseClasses.TwoPort.
Extends from FluidHeatFlow.BaseClasses.TwoPort (Partial model of two port).
| Name | Description |
|---|---|
| medium | Medium in the component |
| m | Mass of medium [kg] |
| T0 | Initial temperature of medium [K] |
| T0fixed | Initial temperature guess value or fixed |
| tapT | Defines temperature of heatPort between inlet and outlet temperature |
| usePressureIncreaseInput | Enable / disable pressure increase input |
| constantPressureIncrease | Pressure increase [Pa] |
| Initialization | |
| V_flow | Volume flow a->b [m3/s] |
| Name | Description |
|---|---|
| flowPort_a | |
| flowPort_b | |
| pressureIncrease | [Pa] |
Modelica.Thermal.FluidHeatFlow.Sources.IdealPumpModel of an ideal pump
Simple fan resp. pump where characteristic is dependent on shaft's speed,
torque * speed = pressure increase * volume flow (without losses)
Pressure increase versus volume flow is defined by a linear function,
from dp0(V_flow=0) to V_flow0(dp=0).
The axis intersections vary with speed as follows:
Coolant's temperature and enthalpy flow are not affected.
Setting parameter m (mass of medium within fan/pump) to zero
leads to negligence of temperature transient cv*m*der(T).
Thermodynamic equations are defined by BaseClasses.TwoPort.
Extends from FluidHeatFlow.BaseClasses.TwoPort (Partial model of two port).
| Name | Description |
|---|---|
| medium | Medium in the component |
| m | Mass of medium [kg] |
| T0 | Initial temperature of medium [K] |
| T0fixed | Initial temperature guess value or fixed |
| tapT | Defines temperature of heatPort between inlet and outlet temperature |
| Initialization | |
| V_flow | Volume flow a->b [m3/s] |
| Pump characteristic | |
| wNominal | Nominal speed [rad/s] |
| dp0 | Max. pressure increase @ V_flow=0 [Pa] |
| V_flow0 | Max. volume flow rate @ dp=0 [m3/s] |
| Name | Description |
|---|---|
| flowPort_a | |
| flowPort_b | |
| flange_a |