tec demo script

8/13/2019 TEC Demo Script

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Solidworks Confidential Page 1

COSMOSFloWorks TEC demo scr ipt

What is thedesign

intent?

Using COSMOSFloWorks, we are going to simulate the behavior beverage as itis cooled by a thermoelectric cooler.

Image

What is it? A thermoelectric cooler, used to chil l beverages, simi lar tothose found in the cup holders of a number of cars.

Goal ofScript

To determine projected temperatures of the cooling beverageusing COSMOSFloWorks.


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Introduction

Thermoelectric coolers (TECs) generate a temperature differential from a current. This is

known as the Peltier Effect. To specify the properties of a new type of TEC in COSMOS

FloWorks, you must input

the maximum DC current, imax

the maximum heat Qmaxtransferred at imaxfrom the cold face to the hot face at

zero temperature difference between these faces

the maximum temperature difference Tmaxbetween the hot and cold faces atthe zero heat transferred from the cold face to the hot face

the voltage Vmaxcorresponding to imax.

These properties are often specified by the manufacturer of the TEC. These are examplespecifications provided by http://www.ferrotec.com.

This is a simplified diagram of a TEC provided by http://www.peltier-info.com.


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This is another diagram of a TEC provided by http://www.peltier-info.com. In this

diagram, youll note that the energy expended from the battery actually generates heatwhile the current is moving it away from the cold side and toward the hot side. Since the

TEC merely moves heat from one location to another while actually generating heat of its

own, a heat sink is necessary to allow it to function correctly.


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Start By Openinganexisting Part

Select cooler.SLDASMfrom the directory

\TEC\

If prompted, add allmaterials to yourengineering database.

Note: If you see this messagewhile opening the assembly, clickOKand then Cancel .

Select Tools > Add Insfrom the main pull downmenu.

SelectCOSMOSFloWorks2008 and click OK.


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Analyze the TECThe objective of this study is todetermine the temperature of thebeverage throughout time.

Start a new FloWorks

project. FloWorks>Project> Wizard

Select Create newtocreate a newconfiguration. ClickNext>


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Select SI units. Changethe temperature units todegrees C. Click Next>

Select ExternalStudyand then check Heatconduction in solids.CheckTime dependant,set the Total analysistimeto 600 seconds andthe Output time stepto10 seconds. Check theGravitybox and ensurethat gravity is set to -9.81m/s^2 in the y direction.Then, click Next>

From the Gassestreedouble clickAir. Fromthe Liquidstree doubleclick Water. Click Next>

Selecting Air first ensures that itwill be the default fluid. Meaningthat anything not specified aswater will be air.


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Select Insulatoras thedefault solid and clickNext>

Click Next>to accept thedefault wall conditions.

Click Next>to accept thedefault initial conditions.


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Ensure that Resultresolution is set to 3and

click Finish.

Apply Goals and BoundaryConditions

Click to open the

FloWorks tab.


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RMC the study no fan (1)and select customizetree

Ensure that Fluid SubDomains,SolidMaterialsandThermoelectricCoolers, are selected.


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Open the input datatree.

RMC Fluid Subdomains

and select Insert FluidSubdomain.

Select Face@Can-1,the largest face on theinterior of the can, toapply the fluid subdomainto. Then change the fluidtype toLiquidsandensure that Wateris

selected. Click OK.

Rename theFluidSubdomain Water.

Change the value of Tunder Thermodynamic

Parametersto 25.


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In the FloWorks tree,RMCSolid Materialsand select Insert SolidMaterial

SelectThermoelectric_element1@cooler and make itCeramic Porcelain. ClickOK.

You can use the feature managertree to the right of the SolidMaterial window to makeselecting the part that you wanteasier


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RMCSolid Materialsand select Insert SolidMaterial

Select cupholder-1@cooler and make it6061 alloy. Click OK.


Select Can-1 @coolerand make it 6061 alloy.Click OK.


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Select heat_sink-1@cooler and make it6061 alloy. Click OK.

RMC RadiativeSurfacesand click InsertRadiative Surface

Select Outside cylindricalface of the can and the

bottom chamfer. Alsoselect inside face of theCupholder facing the can.

Under TypechooseAluminum, commercialsheetfrom drop downmenu


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RMC ThermoelectricCoolersand click InsertThermoelectric

Cooler

SelectThermoelectric_element-1@coolerfor thecomponent to apply thecooler.

Select the bottom face oftheThermoelectric_elementas the Hot Face.

Under Parameters, setthe current to 2 amps andensure that Single Stage

TECis selected. ClickOK.


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RMCGoals and selectInsert Global Goals

Set the parameter toHeat Flux, select

Average valueandensure that Use forconvergence controlisselected. Click OK


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RMCGoals and selectInsert Global Goals

Choose Temperature of

Fluidas the parameterand selectAveragevalue. Ensure that Usefor convergencecontrolis selected. ClickOK.

Run the analysis


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Plot Results

Insert a Cutplot

RMC Resultsand selectload. Load the results file

1.fld from result directory

RMC Cutplots andselect insert

Select the Front Plain,and then ensure thatContours is selected.


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ClickView Settingsand select Temperaturein the Parameter field.Change the minimumtemperature to 5Cand

the maximumtemperature to 50C.Change the Number ofcolorsto 32. Click OK.

Click OK.

The cutplot should looksomething like this.


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Click Next>to accept the

default animation time of10s.

Click Next> to continue.


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SelectScenario andclickNext>.

SelectProportionaldistributionto ensurethat the time passing inthe animation isproportional to the timepassing in the simulation.

RMCon the bar directlyto the left of the time00:00 and directly acrossfrom Cut Plot 1. SelectInsert Control Point.


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A teal diamond shapeoutlined in red shouldappear where youclicked. Another should

follow your mouse. Dragit onto the bar directly tothe left of the time 00:10,where all of the otherdiamond shaped pointsstop.

Change the name of theanimation fromAnimation1.avito any given name.Now you can click thegreen play button to seethe animation on screenor the red record buttonto save the animation.


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tec demo script

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