Page 34 - SUHU DAN KALOR SMA X

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038 ;09C :0;>@ G0=6 38B4@8<0 >;47 94=34;0 :020 :0; Alat Penukar Kalor
3. Perpindahan Kalor secara Radiasi
&0=0A <0B070@8 <4@C?0:0= AC<14@ 4=4@68 B4@14A0@ 1068 :4;0=6AC=60=
783C? <0:7;C: 38 1C<8 &0=0A 30@8 <0B070@8 A0<?08 :4 C<8 B830: <4;0;C8
70=B0@0= :>=3C:A8 0B0C?C= 0;8@0= :>=D4:A8 A4101 :>=3C:A8 30=
:>=D4:A8 <4<4@;C:0= H0B ?4@0=B0@0 A430=6:0= 0=B0@0 #0B070@8 30=
C<8 B4@30?0B @C0=6 70<?0 0B0C 34=60= :0B0 ;08= B830: 030 H0B ?4@0=B0@0 Seperti namanya, alat penukar
&0=0A :0;>@ 30@8 #0B070@8 A0<?08 :4 C<8 B4@9038 A420@0 @0380A8 kalor adalah seperangkat
instrumen di mana terjadi
?0=20@0= !0;>@ 30@8 #0B070@8 A0<?08 :4 C<8 30;0< 14=BC: 64;><10=6 pertukaran kalor antara dua aliran
4;4:B@><06=4B8: 038 ' ( 030;07 & '& $ $ ! "%' " # $)*! fluida bergerak tanpa pencampur-
an. Alat penukar kalor banyak
"%# $ " !)'%# $ ) ! digunakan diberbagai industri
&4@<C:00= 14=30 G0=6 14@E0@=0 78B0< 30?0B <4=G4@0? 30= <4 dengan berbagai model.
Bentuk paling sederhana dari
<0=20@:0= 4=4@68 :0;>@ @0380A8 34=60= 108: A430=6:0= ?4@<C:00= 14=30 alat penukar kalor adalah penukar
14@E0@=0 ?CB87 <4=G4@0? 30= <4<0=20@:0= :0;>@ @0380A8 34=60= 1C@C: kalor pipa ganda, yakni tersusun
&0=4; AC@G0 (%" ' & $ " 386C=0:0= C=BC: <4=G4@0? 30= <4<0=20@:0= oleh dua pipa konsentris dengan
@0380A8 A8=0@ #0B070@8 %;47 :0@4=0 8BC 1830=6 ;>60< 14@>=660=G0 3814@8 diameter berbeda. Satu fluida
mengalir di dalam pipa, dan fluida
E0@=0 78B0< =4@68 :0;>@ @0380A8 38<0=500B:0= C=BC: <4<0=0A:0= 08@ lainnya mengalir pada pipa yang
#>18; <>18; B0=6:8 ?4=60=6:CB <8=G0: ?030 10680= 0B0A B0=6:8 3820B menembus ruang antara pipa.
34=60= E0@=0 ?CB87 0; B4@A41CB 38<0:AC3:0= 6C=0 <4=678=30@8 ?4=G4 Kalor dipindahkan dari fluida yang
panas ke fluida yang dingin
@0?0= 4=4@68 ?0=0A A420@0 :>=D4:A8 >;47 <8=G0: melalui dinding pemisahnya.
&4@<C:00= 14=30 78B0< ;4187 10=G0: <4=G4@0? 30= <4<0=20@:0= Terkadang pipa yang berada di
dalam dibuat dua putaran di dalam
4=4@68 :0;>@ A410;8:=G0 ?4@<C:00= 14=30 14@E0@=0 ?CB87 ;4187 A438:8B selongsong untuk menambah
<4=G4@0? 30= <4<0=20@:0= :0;>@ @0380A8 pertukaran kalor.
a. Api Unggun Information for You
&4@=07:07 =30 <4;0:C:0= #& $ 38 304@07 ?46C=C=60= (C307
<4=9038 70; G0=6 180A0 38 30;0< ?4@:4<070= <4<1C0B 0?8 C=66C= ?8 As the name implies, heat
exchangers are devices where two
C=66C= 381C0B 30@8 @0=B8=6 @0=B8=6 ?>7>= :4@8=6 G0=6 3810:0@ (4B4;07 38 moving fluid streams exchange
1C0B 0?8 C=66C= B4=BC =30 <4=9038 <4@0A0 70=60B E0;0C?C= BC1C7 heat without mixing. Heat
exchanger are widely used in
=30 B830: 14@A4=BC70= 34=60= 0?8 &0=0A 0?8 <4=60;8@ <4;0;C8 C30@0 various industries, and they come in
;4187 10=G0: A420@0 @0380A8 30@8 0?8 C=66C= <4=64=08 BC1C7 =30 30@8 numerous designs.
?030 A420@0 :>=D4:A8 The simplest form of a heat
exchanger is a double tube heat
b. Rumah Kaca exchanger. It is composed of two
)830: A4<C0 64;><10=6 @0380A8 A8=0@ #0B070@8 30?0B <4@0<10B <0AC: concentric pipes of different
diameters. One fluids flows in the
:4 30;0< @C<07 :020 0=G0 2070G0 B0<?0: G0=6 30?0B <4@0<10B 38=38=6 inner pipes, and the other in the
:020 0B0C ?;0AB8: A430=6:0= A8=0@ C;B@0D8>;4B 30= A8=0@ 8=5@0 <4@07 38 annular space between the two
?0=BC;:0= :4<10;8 >;47 38=38=6 :020 =4@68 :0;>@ @0380A8 30@8 2070G0 B0<?0: pipes. Heat is transferred from the
hot fluid to the cold one through
38A4@0? >;47 B0=07 30= B0=0<0= 38 30;0< @C0=6 @C<07 :020 (410;8:=G0 the wall separating them.
B0=07 30= B0=0<0= 0:0= <4<0=20@:0= :4<10;8 64;><10=6 @0380A8 14@C?0 Sometimes the inner tube makes a
couple of turn inside the shell to
A8=0@ 8=5@0<4@07 &0=90=6 64;><10=6 G0=6 ;4187 14A0@ <4=G4101:0= increase the heat transfer area.
64;><10=6 8=5@0<4@07 B4@?4@0=6:0? >;47 38=38=6 :020 A478=660 AC7C @C0=60= Sumber: Thermodynamics, 1998
<4=9038 ;4187 70=60B 30= B0=0<0= 30?0B 783C? 34=60= A460@

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