heat pipe 2 (1) (1)-1

8/18/2019 heat pipe 2 (1) (1)-1

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HEAT PIPESUBMITTED BY:

FAIZ AKRAM

ANOJ KUMAR

SUMIT KUMAR

SHABAZ KHAN

8/18/2019 heat pipe 2 (1) (1)-1


What is a Heat Pipe?A heat pipe heat exha!"e# is a si$p%e &e'ie

(hih is $a&e )se *+ t* t#a!s+e# heat +#*$*!e %*ati*! t* a!*the#, )si!" a! e'ap*#ati*!-*!&e!sati*! .%e/

Heat pipes a#e #e+e##e& t* as the

0s)pe#*!&)t*#s0 *+ heat &)e t* thei# +astt#a!s+e# apa1i%it. (ith %*( heat %*ss/ A heatpipe is a si$p%e &e'ie that a! 2)i3%.t#a!s+e# heat +#*$ *!e p*i!t t* a!*the#/

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Working Principle The heat i!p)t #e"i*! *+ the heat pipe is

a%%e& e'ap*#at*#, the **%i!" #e"i*! is a%%e&*!&e!se#/

I! 1et(ee! the e'ap*#at*# a!& *!&e!se##e"i*!s, the#e $a. 1e a! a&ia1ati #e"i*! /

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4OMPONENTS OF HEAT

PIPES4*!tai!e#

W*#3i!" 5)i&

Wi3 *# 4api%%a#. st#)t)#e

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4*!tai!e#Se%eti*! *+ the *!tai!e# $ate#ia% &epe!&s

*! $a!. +at*#s/ These a#e as +*%%*(s:

The +)!ti*! *+ the *!tai!e# is t* is*%ate the(*#3i!" 5)i& +#*$ the *)tsi&e e!'i#*!$e!t/

4*$pati1i%it. 61*th (ith (*#3i!" 5)i& a!&exte#!a% e!'i#*!$e!t7

St#e!"th t* (ei"ht #ati* The#$a% *!&)ti'it.

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Container Metal Tubing, usually

copper or aluminum.

Provides a medium withhigh thermal

conductivity.

Shape of tubing can be

bent or flattened.

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4ONTAINER MATERIA8S The $a!. $ate#ia%s a'ai%a1%e +*# the

*!tai!e#, the $*st *$$*! i! )se !a$e*ppe#, a%)$i!)$, a!& stai!%ess stee%/

*$$e#ia%%. p)#e *ppe# t)1e is s)ita1%e,

8i3e a%)$i!)$ a!& stai!%ess stee%, the$ate#ia% is #ea&i%. a'ai%a1%e a!& a! 1e

*1tai!e& i! a (i&e 'a#iet. *+ &ia$ete#s a!&(a%% thi3!esses i! its t)1)%a# +*#$/

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WORKIN9 F8UIDThe prime requirements are:

*$pati1i%it. (ith (i3 a!& (a%% $ate#ia% /

9**& the#$a% sta1i%it./'ap*# p#ess)#e !*t t** hi"h *# %*( *'e#

the *pe#ati!" te$pe#at)#e #a!"e /

hi"h %ate!t heat /

hi"h the#$a% *!&)ti'it. /

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WI4K OR 4API88ARY STRU4TUREIt is a p*#*)s st#)t)#e $a&e *+ $ate#ia%s %i3e

stee%, a%)$i!)$, !i3e% *# *ppe# i! 'a#i*)s#a!"es *+ p*#e sies/

The p#i$e p)#p*se *+ the (i3 is t* "e!e#ateapi%%a#. p#ess)#e t* t#a!sp*#t the (*#3i!" 5)i&+#*$ the *!&e!se# t* the e'ap*#at*#/

It $)st a%s* 1e a1%e t* &ist#i1)te the %i2)i&a#*)!& the e'ap*#at*# seti*! t* a!. a#ea (he#eheat is %i3e%. t* 1e #eei'e& 1. the heat pipe/

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Purpose of the Wick

T#a!sp*#ts (*#3i!" 5)i& +#*$ the4*!&e!se# t* the E'ap*#at*#/

P#*'i&es %i2)i& 5*( e'e! a"ai!st "#a'it./

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How the Wick WorksLiquid flows in a wick due to capillary action.

ntermolecular forces between the wick and the fluid

are stronger than the forces within the fluid.

! resultant increase in surface tension occurs.

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Capillary Limitation"ick must have minimum pressure difference

between the condenser and the evaporator for liquid toflow.

#ry$out occurs when there is insufficient pressure

difference.

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Dealing with the Heat

Traditional stacked heatsink and fan set up not

feasible in a laptop

%eed to separate the two

where you have more

space

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Requirements for Cooling

Solid metal rods lose toomuch heat to theenvironment

&annot use a poweredcooling system, too much

power consumptioncaused the problem

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WORKI!

"#aporator

The (*#3i!" 5)i& is heate& t* its 1*i%i!" p*i!ta!& *!'e#te& i!t* a 'ap*#/

P#ess)#e a!& te$pe#at)#e &i;e#e!es +*#es

the 'ap*# t* 5*( t* the **%e# #e"i*!s *+ theheat pipe/

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Condenser`s operations

Con$ensation

'apor gives up its latent heat of vapori(ation

'apor cools down and returns to its liquid state

"orking fluid then flows back to the evaporator

through the wick.

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Heat "%changer

Dissipates heat i!t*e!'i#*!$e!t

Hi"h The#$a% 4*!&)ti'it.

I$p#*'e heat exha!"e#<s

pe#+*#$a!e I!#ease s)#+ae a#ea (ith $*#e=!s

I!%)&e a +a!

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Heat Pipe

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A&'a!ta"es O+ Heat PipesMa. #e&)e *# e%i$i!ate the !ee& =# #eheat/

Re2)i#es !* $eha!ia% *# e%et#ia% i!p)t/

A#e 'i#t)a%%. $ai!te!a!e +#ee/P#*'i&e %*(e# *pe#ati!" *sts/

8ast a 'e#. %*!" ti$e/

A#e e!'i#*!$e!ta%%. sa+e/

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Heat Pipe App%iati*!s

E%et#*!is **%i!"

Ae#*spae

Heat exha!"e#sRe+#i"e#at*#s

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&pplications of Heat Pipes

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'P&C" ("CHOLO!)

Spae#a+t te$pe#at)#e e2)a%iati*!

4*$p*!e!t **%i!", te$pe#at)#e *!t#*% a!&#a&iat*# &esi"! i! sate%%ites/

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L&P(OP H"&( PIP" 'OL*(IO

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HEAT PIPE IN 4PU

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COCL*'IO

The *st *+ heat pipes &esi"!e& +*# %apt*p )se is'e#. *$petiti'e *$pa#e& t* *the# a%te#!ati'es/

4*st is pa#tia%%. *;set a!& >)sti=e& 1. i$p#*'e&

s.ste$ #e%ia1i%it. a!& the i!#ease& %i+e *+ **%e##)!!i!" e%et#*!is/

Heat pipe $a!)+at)#e has 1ee! a &i)%t a#eat* *$pete i!/ Si$p%e i! *!ept, 1)t &i)%t t*

app%. *$$e#ia%%., the heat pipe is a 'e#.e%)si'e teh!*%*". @ h*%&s the 3e. t* the +)t)#e*+ heat t#a!s+e# @ its a%%ie& app%iati*!s/

8/18/2019 heat pipe 2 (1) (1)-1


THANK YOU

heat pipe 2 (1) (1)-1

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