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MapleSim Hydraulics Library from Modelon

Gas Volume BB  Refined model of charge gas

The Gas Volume BB component describes the behavior of the charge gas in an accumulator according to the Beattie-Bridgeman equation.

Connections

Name

Description

Modelica ID

portA

Hydraulic port where oil enters the component

port_A

oil

 

oil

Parameters

Name

Default

Units

Description

Modelica ID

ΔTsystem

0

K

Temperature offset from system temperature

dT_system

mgas

0.0394

kg

Gas mass (default is for 1e-3 m3 und 3.5 MPa)

gm

VgasT0

0.001

m3

Gas volume at t = 0

GasVol_T0

Τ

5

s

Thermal timeconstant

Tau

Θ

300

K

Temperature of environment

Theta

cv¯

750

 

Mean value of cv

CvBar

Constants

Name

Value

Units

Description

Modelica ID

R

0.00297

 

 

R

A0

0.00174

 

 

A0

B0

0.0018

 

 

B0

AA

9.34·10-4

 

 

AA

B

-2.47·10-4

 

 

B

C

5.09·10-8

 

 

C

F

105

 

 

F

C11

745.005

 

 

C11

C12

0.0576

 

 

C12

C13

1.11·10-4

 

 

C13

C21

9.15·10-6

 

 

C21

C22

-3.3·10-8

 

 

C22

C23

3.08·10-11

 

 

C23

C31

-5.61·10-14

 

 

C31

C32

2.15·10-16

 

 

C32

C33

-2.03·10-19

 

 

C33

See Also

Volumes, MapleSim Hydraulics Library from Modelon Overview


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