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Ideal Pump

Model of an ideal pump

 

Description

Connections

Variables

Parameters

Initial Conditions

See Also

Description

The Ideal Pump component is a two-port thermal-fluid component that models an ideal (lossless) pump driven by a rotational flange. The temperature and enthalpy of the medium are not changed. The equations are

if &omega; <&epsilon; then     &Delta;p &equals; 0     &tau;&equals;0else     &Delta;p&equals;&Delta;pmaxsignωωnomωωnom21VflowVflowmaxωnomω      &omega;&tau;&equals;&Delta;pVflow end if

Qflow&equals;0

Connections

Name

Description

flowPorta

Thermal-fluid flow port

flowPortb

Thermal-fluid flow port

flangea

Rotational flange

Variables

Symbol

Units

Description

Modelica ID

&Delta;p

Pa

Pressure drop from a to b

dp

Qflow

W

Heat exchange with ambient        

Q_flow

Vflow

m3s

Volume flow from a to b

V_flow        

&tau;

Nm

Torque at flangea

flange_a.tau

&omega;

radsec

Rotational velocity of flangea

der(flange_a.phi)            

Parameters

Symbol

Default

Units

Description

Modelica ID

medium

fluidMedium

-    

Thermal-Fluid Media

medium

m

1

kg

Mass of medium in component

m

T0

293.15

K

Initial temperature

T0

&omega;nom

1

radsec

Nominal rotational speed of flangea

wNominal

&Delta;pmax

2

Pa

Maximum pressure increase (at Vflow&equals;0&rpar;

dp0

Vflowmax

2

m3s

Maximum volume flow rate (at p&equals;0)

V_flow0

Initial Conditions

Symbol

Units

Description

Modelica ID

&Delta;p0

Pa

Initial pressure across device

dp

Vflow0

m3s

Initial volumetric flow through device

V_flow

&omega;0

radsec

Initial rotational velocity of flangea

der(flange_a.phi)

See Also

Thermal Sources

Thermal Overview

The components described in this topic are from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.

 

 

 

 

 


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