heat pipe 2.pptx

7/24/2019 heat pipe 2.pptx

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HEAT PIPES

SUBMITTED BY:DEVNA RANI



What is a Heat Pipe?A heat pipe heat exchanger is a sip!e "e#ice

$hich is a"e %se &' t& trans'er heat 'r&&ne !&cati&n t& an&ther( %sing an e#ap&rati&n)c&n"ensati&n c*c!e+

Heat pipes are re'erre" t& as the,s%perc&n"%ct&rs, &' heat "%e t& their 'ast

trans'er capa-i!it* $ith !&$ heat !&ss+



Working Principle The heat inp%t regi&n &' the heat pipe is

ca!!e" e#ap&rat&r( the c&&!ing regi&n is ca!!e"c&n"enser+

In -et$een the e#ap&rat&r an" c&n"enserregi&ns( there a* -e an a"ia-atic regi&n +



./MP/NENTS /0 HEAT

PIPES.&ntainer

W&r1ing 2%i"

Wic1 &r .api!!ar* str%ct%re



.&ntainerSelection of the container material

depends on many factors. These are asfollows:

The '%ncti&n &' the c&ntainer is t& is&!ate the$&r1ing 2%i" 'r& the &%tsi"e en#ir&nent+

.&pati-i!it* 3-&th $ith $&r1ing 2%i" an"

externa! en#ir&nent4Strength t& $eight rati&

Thera! c&n"%cti#it*



./NTAINER MATERIA5S The an* ateria!s a#ai!a-!e '&r the c&ntainer(

three are -* 'ar the &st c&&n in %se naec&pper( a!%in%( an" stain!ess stee!+

Whi!e c&ercia!!* p%re c&pper t%-e iss%ita-!e( the &x*gen)'ree high c&n"%cti#it* t*pe

is pre'era-!e+

5i1e a!%in% an" stain!ess stee!( the ateria!is rea"i!* a#ai!a-!e an" can -e &-taine" in a$i"e #ariet* &' "iaeters an" $a!! thic1nessesin its t%-%!ar '&r+



W/R6IN7 05UIDThe prime requirements are:

c&pati-i!it* $ith $ic1 an" $a!! ateria! +

7&&" thera! sta-i!it*+#ap&r press%re n&t t&& high &r !&$ &#er

the &perating teperat%re range +

high !atent heat +

high thera! c&n"%cti#it* +

!&$ !i8%i" an" #ap&r #isc&sities+

high s%r'ace tensi&n+

accepta-!e 'ree9ing &r p&%r p&int+



WI.6 /R .API55ARY STRU.TUREIt is a p&r&%s str%ct%re a"e &' ateria!s !i1e

stee!(a!%ini%( nic1e! &r c&pper in #ari&%sranges &' p&re si9es+

The prie p%rp&se &' the $ic1 is t& generatecapi!!ar* press%re t& transp&rt the $&r1ing 2%i"'r& the c&n"enser t& the e#ap&rat&r+

It %st a!s& -e a-!e t& "istri-%te the !i8%i"ar&%n" the e#ap&rat&r secti&n t& an* area $hereheat is !i1e!* t& -e recei#e" -* the heat pipe+



./NTINUED+Wic1s are 'a-ricate" %sing eta! '&as( an"

&re partic%!ar!* 'e!ts( the !atter -eing &re're8%ent!* %se"+ B* #ar*ing the press%re &nthe 'e!t "%ring asse-!*( #ari&%s p&re si9escan -e pr&"%ce+

The axi% capi!!ar* hea" generate" -* a

$ic1 increases $ith "ecrease in p&re si9e+ The $ic1 perea-i!it* increases $ithincreasing p&re si9e+



T*pes &' Heat Pipes5ea"ing e"ge

R&tating an" re#&!#ing

0!at P!ate

Micr& heat pipes



A"#antages /' Heat PipesMa* re"%ce &r e!iinate the nee" ;r reheat+

Re8%ires n& echanica! &r e!ectrica! inp%t+

Are #irt%a!!* aintenance 'ree+

Pr&#i"e !&$er &perating c&sts+

5ast a #er* !&ng tie+

Are en#ir&nenta!!* sa'e+



Heat Pipe App!icati&nsE!ectr&nics c&&!ing

Aer&space

Heat exchangers



RE0EREN.ES $$$+heatpipe+c&+

$$$+cheres&%rces+c&+

$$$+in"e1+c&$$$+$i1ipe"ia+&rg



THAN6 Y/U

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