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WOLFRAM SYSTEM MODELER

IdealPump

Model of an ideal pump

Wolfram Language

In[1]:=

SystemModel["Modelica.Thermal.FluidHeatFlow.Sources.IdealPump"]

Out[1]:=

Information

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

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:

dp prop. speed^2
V_flow prop. speed

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.

Parameters (8)

medium	Value: FluidHeatFlow.Media.Medium() Type: Medium Description: Medium in the component
m	Value: Type: Mass (kg) Description: Mass of medium
T0	Value: Type: Temperature (K) Description: Initial temperature of medium
T0fixed	Value: false Type: Boolean Description: Initial temperature guess value or fixed
tapT	Value: 1 Type: Real Description: Defines temperature of heatPort between inlet and outlet temperature
wNominal	Value: Type: AngularVelocity (rad/s) Description: Nominal speed
dp0	Value: Type: Pressure (Pa) Description: Max. pressure increase @ V_flow=0
V_flow0	Value: Type: VolumeFlowRate (m³/s) Description: Max. volume flow rate @ dp=0

Outputs (4)

T	Type: Temperature (K) Description: Outlet temperature of medium
T_a	Type: Temperature (K) Description: Temperature at flowPort_a
T_b	Type: Temperature (K) Description: Temperature at flowPort_b
dT	Type: TemperatureDifference (K) Description: Temperature increase of coolant in flow direction

Connectors (3)

	flowPort_a	Type: FlowPort_a Description: Filled flow port (used upstream)
	flowPort_b	Type: FlowPort_b Description: Hollow flow port (used downstream)
	flange_a	Type: Flange_a Description: One-dimensional rotational flange of a shaft (filled circle icon)