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FAN

FAN to produce the air flow

 

Description

Equations

Variables

Connections

Parameters

See Also

Description

The FAN component models is used to produce the air flow for the lumped thermal fluid simulation of Air. This component calculates mainly the mass flow rate.

Equations

The calculation is changed based on parameter values of Dynamics of mass in the Air Settings component.

The pressure difference is calculated with:

(*)  is the function of Lookup table of 1D.

(*) data is specified with:

     - If data_source = inline, parameter P-Q curve.

     - If data_source = attachment, an attached file (.csv and .xls, .xlsx) is used

     - If data_source = file, need to specify the path of file (.csv and .xls, .xlsx).

 

Dynamics of mass = Static

Volume flow rate is calculated with:

Port's mass flow rate is defined with:

Dynamics of mass = Dynamic

Volume flow rate is calculated with:

Port's mass flow rate is defined with:

 

Common definitions are the following:

 

Variables

Symbol

Units

Description

Modelica ID

Pressure difference

p

Mass flow rate

mflow

Velocity of flow

v

Volume flow rate

Q

Targeted volume flow rate

Q_target

Connections

Name

Units

Condition

Description

Modelica ID

 

Air Port

 

Air Port

 

Fan speed

If External input of Designed volume flow rate is true

Designed volume flow rate input.

Parameters

Symbol

Default

Units

Description

Modelica ID

Specify a component of Air simulation settings

Settings

Maximum fan speed

w_max

Flow area

A

inline

-

See Data Source Options section above.

PQ_datasourcemode

P-Q characteristic curve, if  = inline.

[1] :Volume flow rate

[2] :Pressure difference

PQ_curve

-

P-Q characteristic curve, if  =file or attachment. You can specify data by using an attached file or specifying the path of file (.csv and .xls, .xlsx)

PQ_data

-

Determines which columns of the data table will be used to interpolate.

For example, in an Excel spreadsheet, column A corresponds with 1, column B corresponds with 2, and so on.

PQ_columns

0

-

Number of rows that are skipped from the top of the data table.

PQ_skiprows

Table points are linearly interpolated

-

Determines whether the data points will be interpolated linearly or with a cubic spline.

PQ_smoothness

Time constant for Volume flow rate if Dynamics of mass is Dynamic.

T_const

use as Designed volume flow rate if Dynamics of mass is Static and External input of Designed volume flow rate is false.

Q_designed

If External input of Designed volume flow rate is false, input port  is used as the designed volume flow rate.

useExtQ_designed

See Also

Heat Transfer Library Overview

Air Overview

Air Basic Overview

 


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