Multi Radiation - MapleSim Help
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Multi Radiation

 Multiple Heat Radiation

Description

The Multi Radiation component models multiple Heat Radiations.

The total number of Heat Radiation components is determined by the  parameter.

The following image is an example with Heat Radiation components to explain the behavior of Multi Radiation component.

Radiation type

Radiation geometry

Use Correction input

Constant

-

false or true

External input

-

false or true

General

-

false or true

Use References

Surrounded object

false or true

Two parallel plates

false or true

Two long concentric cylinders

false or true

Concentric spheres

false or true


The following table gives images of radiation geometry when Radiation type is Use References.

Radiation type

Radiation geometry

Use References

Surrounded object

Two parallel plates

Two long concentric cylinders

Concentric spheres


(For details, see Heat Radiation help).

Equations

(For details, see Heat Radiation help).

Variables

(For details, see Heat Radiation help).

Connections

Name

Units

Condition

Description

Modelica ID

 

 

i-th thermal port, a

port_a[i]

 

 

i-th thermal port, b

port_b[i]

if Radiation type is
External input.

Input signal of the heat transfer coefficient

Gr_in

-

if use correction input is
true.

i-th input signal of the correction factor for

cor[i]

Parameters

Symbol

Default

Units

Description

Modelica ID

Select Type of Radiation

 General : Use the generalized equation

 Constant : Radiation conductance is constant

 External input: Radiation conductance given by input

 Use References : Use references for Radiation conductance

TypeOfRadiation

Geometry type of Radiation.

RadiationGeometry

Number of node

numNode

If true, Emissivity for Material 1 are defined by reference data

use_reference_emissivity1

If true, Emissivity for Material 2 are defined by reference data

use_reference_emissivity2

Emissivity for Material 1 if Use references of emissivity for Material 1 is true.

TypeOfMaterial1

Emissivity for Material 2 if Use references of emissivity for Material 2 is true.

TypeOfMaterial2

 

Emissivity of object 1 on port a

eps1

 

Emissivity of object 2 on port b

eps2

Surface area of object 1

A1

Surface area of object 2

A2

Radius of object 1, Inner

r1

Radius of object 2, Outer

r2

Length of object 1

L1

View factor for Radiation

F12

Net radiation conductance between two surfaces

Gr

If true, input of correction for Gr_act is valid

use_correction

See Also

Heat Transfer Library Overview

Multiple Overview

 


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