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MapleSim Hydraulics Library from Modelon

Gas Cylinder  Gas volume in a gas-filled piston accumulator

The Gas Cylinder component describes a high-pressure gas volume in a cylinder. For initializing the amount of gas in the cylinder, it is assumed that the preload pressure, p_preload, and the initial temperature, T_start, completely fill the cylinder to initialFilling  s_max, where s_max is the maximum position of the cylinder.

Connections

Name

Description

Modelica ID

flangea

 

flange_a

flangeb

 

flange_b

environment

Port for environment temperature

environment

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

Vstart

PistonAreasmax

m3

Initial Volume

V_start

Tstart

300

K

Initial gas Temperature

T_start

tthermal

 

s

Thermal time constant

t_thermal

use time constant

true

 

 

use_time_constant

α

150

Wm2K

Heat transfer coefficient

alpha

ppreload

 

Pa

Gas preload pressure

p_preload

Vmax

1

m3

Maximum volume

V_max

di

 

m

Inner diameter of cylinder

d_i

smax

 

m

Maximum position of cylinder

s_max

initial filling

1

 

Initial filling of cylinder as fraction of total

initialFilling

Constant Parameters

Name

Default

Units

Description

Modelica ID

PistonArea

[1]

m2

Cross section area

PistonArea

[1] 14di2π

See Also

Volumes, MapleSim Hydraulics Library from Modelon Overview


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