Experimental analysis of heat sink package for electrical.pptx

7/21/2019 Experimental analysis of heat sink package for electrical.pptx

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Experimental analysis of heat sinkpackage for electrical circuitsStudents Names:

Ayad A. Taha

Yousif Layth

Alan M. khalid

Supervisors :

Dr.Oday Adnan

Mr. aafat !a"i"


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Abstract

Experimental models to be developed for determining heat transfer fromheat sinks used in electronic packaging application.

The heat transfer coe cient for the heat sink and the average temperatureof the uid inside heat sink are to be obtained.

All Experimental models can be applied over a wide range of heat sinks


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Introduction

eat sinks are the most common thermal management hardware usedin micro! and opto!electronics.

eat sinks improve the thermal control of electronic components"assemblies" and modules by enhancing their surface area.

Applications utili#ing heat sinks for cooling of electronics have increasedsigni$cantly during the last few decades


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eat %ink

In electronic systems" a heat sink is a passive heat exchanger thacools a device by dissipating heat into the surrounding medium.

eat sinks are used with high!power semiconductor devices such aspower Transistors and optoelectronics such as lasers and light emittingdiodes '(E)s*" where the heat dissipation ability of the basic device is

insu cient to moderate its temperature.


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eat sink

A heat sink is designed to maximi#e its surface area in contact with thecooling medium surrounding it. it" such as the air. Air velocity" choice ofmaterial and surface treatment are factors that a+ect the performanceof a heat sink.

A heat sink transfers thermal energy from a higher temperature deviceto a lower temperature uid medium. The uid medium is fre,uently air"but can also be water" refrigerants or oil.


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Experimental -ork

%imple model of heat sink have been designed which consist of twoaluminum sheet mounted on top of heater from both sides. The heaterwill be representing /0 on load.

The heater temperature is controlled through a voltage regulator

thermocouples are used to read the temperature of heat sink


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1oltage regulator

234!5 voltage regulator used to control the applied voltage to a high performance Triac type5T567"it can be used for phase control of inductive and resistive load such as heater.

ave a built!in (E) which can display output voltage" and have many other advantages suchas high accuracy" good shock!resistance" good reliability" strong anti!interference ability" smalloverall dimensions and light weight.


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eat sinks


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8eading temperature

To read the temperature of heat sink thermocouple have been used.microcontroller were used the microcontroller read the temperaturethrough A) input and display the temperature on an ( ) display .


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8eading temperature9.

Thermocouples:A thermocouple is a type of temperature sensor"which is made by ;oining two dissimilar metals atone end. The ;oined end is referred to as theHOT JUNCTION. The other end of these dissimilarmetals is referred to as the COLD END or COLD

JUNCTION.

T Type k:The Type 3 thermocouple has a#hromel positive leg and an Alumel $Ni%kel&'( Aluminum and Sili%on) negative leg.

The temperature range for Type 3 is !


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8eading temperature9

A)?@?

A)?@? is a complete instrumentation ampli$er andthermocouple cold ;unction compensator on amonolithic chip.

A)?@? combines an ice point reference with aprecalibrated ampli$er to produce a high level '7=m1 B * output directly from a thermocouple signal.


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8eading temperature

)esign simulation in /roteus


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8eference

Codeling of ylindrical /in!Din eat %inks for Electronic /ackaging"-a,arAhmed 3han" .8ichard ulham" Cember" IEEE" and C.Cichael

Fovanovich

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Experimental analysis of heat sink package for electrical.pptx