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MapleSim Hydraulics Library from Modelon

Generic Valve  Model for generic valve

The Generic Valve component calculates the pressure loss for a given valve geometry (selected by the user). The calculation depends on the opening of the valve.

Connections

Name

Description

Modelica ID

portA

Layout of port where oil flows into an element (0<mflow, pB<pA means 0<&Delta;p)

port_A

portB

Hydraulic port where oil leaves the component (mflow<0, pB<pA means 0<&Delta;p)

port_B

oil

 

oil

opening

 

opening

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

use volume A

true

 

If true, a volume is present at port_A

useVolumeA

use volume B

true

 

If true, a volume is present at port_B

useVolumeB

VA

10-6

m3

Geometric volume at port A

volumeA

VB

10-6

m3

Geometric volume at port B

volumeB

Hydraulic Resistance Parameters

Name

Default

Units

Description

Modelica ID

geometry

[1]

 

Choice of geometry for valve

geometry

valve coefficient

[2]

 

Choice of valve coefficient

valveCoefficient

Av

[3]

 

Av (metric) flow coefficient [Av]=m^2

Av

Kv

10000000277Av

 

Kv (metric) flow coefficient [Kv]=m^3/h

Kv

Cv

5000000123Av

 

Cv (US) flow coefficient [Cv]=USG/min

Cv

&Delta;pnominal

1000

Pa

Nominal pressure loss

dp_nominal

mflownom

[4]

kgs

Nominal mass flow rate

m_flow_nominal

ρnominal

1000

kgm3

Nominal inlet density

rho_nominal

openingnominal

12

 

Nominal opening

opening_nominal

ζtotmin

0.001

 

Minimal pressure loss coefficient at full opening

zeta_TOT_min

ζtotmax

108

 

Maximum pressure loss coefficient at closed opening

zeta_TOT_max

&Delta;psmall

1100&Delta;pnominal

Pa

Linearization for a pressure loss smaller then dp_small

dp_small

[1] Modelica.Fluid.Dissipation.Utilities.Types.ValveGeometry.Ball

[2] Modelica.Fluid.Dissipation.Utilities.Types.ValveCoefficient.AV

[3] 1400π

[4] openingnominalAvρnominal&Delta;pnominal

See Also

HydraulicResistance, MapleSim Hydraulics Library from Modelon Overview


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