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MapleSim Hydraulics Library from Modelon

Flow Source Ext Command  Flow source with internal leakage and

The Flow Source Ext Command component describes a flow source with externally commanded flow rate and internal leakage.

Implementation

See component Id Flow Source Ext Command. The delivered flow rate at the outlet port of this model may be different because of flow into the lumped volume and external leakage to the tank.

 

Equations

Variables

Connections

Parameters

Equations

T=T0oil+ΔTsystem

pabs=pB+patmoil

Variables

Name

Value

Units

Description

Modelica ID

psat

[1]

Pa

Gas saturation pressure

p_sat

Vol

 

 

 

Vol

tank

 

 

 

tank

pabs

 

Pa

Absolute pressure, used for all property calls

p_abs

T

 

K

Local temperature

T

ρsummary

[2]

kgm3

Density

summary_rho

pBsummary

pB

Pa

Pressure at port B

summary_pB

IFE

 

 

 

IFE

[1] oil.gasSaturationPressureT=T,vgas=oil.vgas

[2] oil.densityp=pabs,T=T,vair=oil.vgas,psat=psat

Connections

Name

Description

Modelica ID

oil

 

oil

portB

Port B, where oil leaves the component (q<0, pB<pA means 0<&Delta;p)

port_B

commandSignal

Connector of input signal used as flow rate

commandSignal

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

G

5.·10-12

m3sPa

Conductance of pump leakage

G

use volume B

true

 

If true, a volume is present at port B

useVolumeB

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

Oil Parameters

Name

Default

Units

Description

Modelica ID

VB

10-6

m3

Geometric volume at port B

volumeB

See Also

Id Flow Source Ext Command

Pumps

MapleSim Hydraulics Library from Modelon Overview

 


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