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Template: TwoPort

The TwoPort template is a partial model of a two-port hydraulic component with no storage of mass or energy at the ports.  The two hydraulic ports are A and B.

Variables

Name

Value

Units

Description

Modelica ID

pA

 

Pa

pressure at port A

port_A.p

pB

 

Pa

pressure at port B

port_B.p

pAabs

pA+poilatm

Pa

absolute pressure at port A

pA_abs

pBabs

pB+poilatm

Pa

absolute pressure at port B

pB_abs

pAlim

maxpA,poilvapourpoilatm

Pa

limited gauge pressure at port A

pA_limited

pBlim

maxpB,poilvapourpoilatm

Pa

limited gauge pressure at port B

pB_limited

pAsum

pA

Pa

pressure at port A

summary_pA

pBsum

pB

Pa

pressure at port B

summary_pB

Δp

pAlimpBlim

Pa

pressure differential

dp

psat

oil.gasSaturationPressureT,oil.v_gas

Pa

gas saturation pressure

p_sat

mflowA

 

kgs

mass flow rate at port A; positive if oil is entering the component.

port_A.m_flow

mflowB

 

kgs

mass flow rate at port B; positive if oil is entering the component.

port_B.m_flow

HPsum

Δpq

W

hydraulic power

summary_HP

q

mflowAρ

m3s

volume flow rate into port A

q

qsum

q

m3s

volume flow rate into port A

summary_q

ρ

ρΔp,pAabs,pBabs,T,oil

kgm3

upstream density of oil

rho

ν

νΔp,pAabs,pBabs,T,oil

m2s

upstream kinematic viscosity of oil

nu

T

Toil0+ΔTsystem

K

local temperature of oil

T

Parameters

Name

Default

Units

Description

Modelica ID

ΔTsystem

0

K

temperature offset from system temperature

dT_system

Assumptions

No storage of energy or mass.

Sign Conventions

If the pressure at port A is greater than the pressure at port B, the volume flow rate at port A is positive.


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