LU N V N T T NGHI P TÀI: “ ”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• % 78 $ " & " & / O9 O • • • &' " , ! ! $ ! $ / B2( Μ[ \ I E K / 24B( \ >? I E K " / ]^ \ >@@@ I E K " / x F \ >@L I) E) # = / x P \ HAL I) E) # / xW \ >(AL I) E) K K K / • " " " " ' ) " / ]^( ^/ ! ]D( D/ ! ]_( _/ ! C / ! % "( x i / • (! < H $( # - ,* > ,9 xF = " ! $ # " " ! $ ! $ % ! * " &4 H( ' $ >&4( ) " " ^ \ @&@A?? " ρF = 0.3 xF ρR ρN 0.5 0.6 " * "! " " * @ '^ \ H>(A >@( `>a ρ N \ HJ (4A ) E H( `>a " $ − xF + = 0.4 ρ R \ G44&>H ) E ) " " * 0.1 − + = 1,072.10 −3 722,19 964,25 ρ F = 933.0 ) E >> 0.7 0.8 " $ 0.9 ! " x,y 1.0 V ' ]^ \ H (@ ) E M F = x F M R + (1 − x F ).M N = 0,1.32 + (1 − 0,1).18 = 19,4 ) E) G 933,0 F= F = E = 48,093 ) MF 19,4 1( 2' 5* 6) '3 , P * ^\DO_ ^& ^ \ D& D O _& " 8* D ' I _ , ! P + W = 48,093 0,9144 P + 0,0085W = 48,093.0,0588 D \ 4(JG ) E _\ A( ) E C " M P = x P M R + (1 − x P ).M N = 0,95.32 + (1 − 0,95).18 = 31,30 ) E) M w = xW M R + (1 − xW ).M N = 0,015.32 + (1 − 0,015).18 = 18,21 ) E) V ]D \ D&9D \ 4(JG& >( @ \ ? (AG ) E ]_ \ _&9_ \ A( 4&>?(4> \ ?4G(> ) E 7( ! 6) * @ I - +, ' $ ! " > % , $ ! > N " ^ \ @(@A?? "! % 84 O '= ! " " # x − y *F 0,9144 − 0,295 = 2,62 = [ " = P* y F − x F 0,295 − 0,0588 O '= ! OV P $ y F* \ @(4HA *" / [ \ >( [ " O @( \ >( &4(J4 O @& \ (G> " $ " x P − xW 0,9144 − 0,0085 = 18,01 = f = 0,0588 − 0,0588 x F − xW D , *" $ % / R+ f 1− f 3,71 + 18,01 − 18,01 y= x + ⋅x+ ⋅ xW = 0,0085 = 4,61.x − 0,031` R +1 3,71 + R +1 3,71 + y = 4,61.x − 0,031` D , *" $ % / >4 / λ = λ R xW + λ N (1 − xW ) − 0,72.xW (1 − xW ).(λ N − λ R ) \ @(JGA I_E FK I >& G( " " / \ >4 (b>cK " $ " $ [ _ O &I> WX Gr = \ 4(@A oE) F [ \ 4?(HH oE) F _K \ >(H oE) F / / IN& AK( >4( b4c/ PrW = cµ λ \ 4(AA g.d o3 ρ β ∆t µ2 1 = = 2,755.10 −3 ( K −1 ) T 90 + 273 9,81.0,032 3.964,18 2.2,755.10 −3.8,25 Gr = = 61,59.10 −3 (0,327.10 ) β= ! _ \ >4(>H " $ ! $ # " / NuW λW 12,19.0,675 α_ \ = = 257,20 _E d tr 0,032 +_ \ α_& ∆ \ 4AG(4&?(4A \ 4>4>(J _E 4 & &e ! " $ " " / " 7, $ " / M \ l I N O [K \ (@ ' " " ,/ F " " $ / ρ \ HH@(4 ) E F " " $ / ρ[ \ GJ?(? ) E xF − xF 0,1 − 0,1 / ρ \ HJ4(A ) E = + = + = 1,02.10 −3 768,8 990,2 ρ ρR ρN / µ \ A(J?&>@ &!E / µ[ \ (@A&>@ &!E / µ \ ^ µ[ O I> ^K µ µ \ A(44&>@ I.&!E 4K ! " $ / λ \ @(JA@ _E F ! " $ / λ[ \ @(4>4 _E F / λ \ λ R xW + λ N (1 − xW ) − 0,72.xW (1 − xW ).(λ N − λ R ) \ @( ?4 _E F I 5 $ $ >& G( >4 (b>cK " " " " / \ [.xF O WX $ / \ >(G? oE) F $ / [ \ 4J(?J oE) F & I> xFK \ @(H@ oE) F IN& AK( )0 >4( b4c/ Pr = $ ) $ ) G cµ λ \ ( " / d td = Dt2 − n.d o2 0,7 − 127.0,032 = 0,076m = Dt + n.d o 0,7 + 127.0,032 N $ " " " / 4G F 4.1000 vF = = = 3,57.10 −3 3600 ρπ ( Dt2 − n.d o2 ) 3600.962,5.π (0,7 − 127.0,032 ) # ! [ !/ v F d td ρ F 3,57.10 −3.0,076.962,5 Re F = = = 710,9 h @@ / µF 5,22.10 − WX $ IN&AJK( 4@( b4c 0, , 33 Nu D = 1,16.d Re D PrD E! % # ! !! 0, td = 1,16.0,108 0,6.710,9 0, 6.4,430,33 = 25,64 ∆ > \ >? ! " $ " " / Nu F λ F 25,64.0,482 α^ \ = = 114,43 _E 0,108 d td +^ \ α^& ∆ > \ >>4(GA&>? \ 4@AH(G _E F* - & * & '/ qW − q F ε\ >@@L \ 4(H4L h AL I qW & &e ! % K= < % < % - % - % " V % " % V < Q K ∆t log " / , 115,7.1000 = = 40,41 75,85.37,75 \ >4G % / \ ?I & Bn " /C\ /7\> K \ @(@ ? * d ($JZeT * )0 F % " / 78/ " /9 0' " / " / " ^\ $ K = 75,85 _E 1 −4 + 5,565.10 + 257,20 114,43 $ " , " F \ 4(A> I K d n + d tr nπ C \ 4(A J[T V1W 78/ Z \ I7 >K O ? \ @(G & & % & / ( Bn < % " " / Z ( # +5* ' G I " * $3 78 % " /δ \ / # " ST * " * " " * " " \ 4>?HA@@ oE) & " " >& C - & )" \ ? \ @(@ ? \ @(@@ \ @(@ / > \ >EA@@@ " / \>EA?@@ "/ " ( P )0 )0 $ $ ,9 +,' " " " e>?2>@'( )0 N &FE_ &FE_ \ J@(@ * % " / \ ]^& ^&I *K \ ] & 7, ,/ \ J (4A " " $ / \ >(? oE) F " " $ / [ \ 4?(4@ oE) F / ^ \ [.xF O & I> xFK \ >(@4 oE) F \ >@@@& >(@4&I J?(A J@K \ (?G )_ ] \ >A(H I) E K ∆t log ! " ! 7, )" # % " " % ( / (126,25 − 60,0) − (126,25 − 68,5) = = 62,15 F 126,25 − 60,0 Ln 126,25 − 68,5 ! % % " / " F F= / > > > +Σ + α α / 4 P " 2" ? (_E &F N "/ α / ! " $ ( _E 4&F α / ! " $ " ( _E 4&F / " $+ * & < % / δ \ @(@@ ! " $ ) =/ λ \ >J( _E F " $ / > \ >EA?@@ 4&FE_ " $ " / \>EA?@@ 4&FE_ \ A(4?H&>@ &FE_ / H " \ J?(A \ >4J(4A ( [ & ! &>& e ! " $ " " / " 7, $ " / M \ l I N O [K \ J (4A ' " " ,/ F " " $ / ρ \ HGH(? ) E F " " $ / ρ[ \ G J(4 ) E xF − xF 0,1 − 0,1 = + = + / ρ \ HA@(@J ) E ρ ρR ρN 746,2 979,8 / µ \ (??&>@ &!E / µ[ \ (>4&>@ &!E / µ \ ^& µ[ O I> ^K& µ µ \ (JA&>@ &!E ! " $ / λ \ @(JJ> _E F ! " $ / λ[ \ @(>@A _E F / λ \ λ R x F + λ N (1 − x F ) − 0,72.x F (1 − x F ).(λ N − λ R ) \ @(AJH _E F I 5 $ $ >& G( >4 (b>cK " " " " / \ [.xF O $ / \ >(? oE) F $ / [ \ 4?(4@ oE) F & I> xFK \ @( GA oE) F WX N IN& AK( >4( b4c/ Pr = cµ λ \ 4(J@ $ " / 4G F 4.1000 vF = = = 0,003 3600 ρ F nπd tr 3600.950,06.127.π 0,032 E! # ! [ !/ v d ρ 0,003.0,032.950,06 Re F = F tr F = = 250,0 h @@ / µF 3,65.10 − WX I>&?@K( Nu w = 0,15.ε l Re 0n,33 Prn0, 43 Gr 0,1 >( bAc Prn Prw $ % # ! !! / 0, 25 ' / ε> ! $ $ $ "C* )0 $ & ' $ >&4( >( bAc ε> \ > ∆ \ 4@ p4 \ ? (4A ' " " / $ / µ \ (@ &>@ &!E $ / µ[ \ 4(4J&>@ &!E / µ \ ^ µ[ O I> ^K µ µ \ 4(H?&>@ &!E ! " $ / λ \ @(JGG _E F ! " $ / λ[ \ @(>G? _E F A@ ! " $ " " % / λ \ λ R x F + λ N (1 − x F ) − 0,72.x F (1 − x F ).(λ N − λ R ) \ @(AHA _E F I >& G( >4 (b>cK " " " " / \ [ ^ O $ / \ 4@>(? oE) F $ / [ \ 4H44(@ oE) F &I> ^K \ >4J(A oE) F WX IN& AK( Gr = β= cµ \ 4(@JG λ g.d o3 ρ β ∆t µ2 1 = = 2,96.10 −3 K −1 T 64,25 + 273 9,81.0,032 3.950,06 2.2,96.10 −3.20 = 193,4.10 (0,298.10 −3 ) Gr = ! >4( b4c/ PrW = ^ \ >>( " " " Nu F λ F 11,4.0,595 α^ \ = = 212,0 _E d tr 0,032 +^ \ α^& ∆ & &e WX $ " I>&>>@K( $ " ?( bAc α > = @(G4A 4 \ 4>4(@&4@ \ @(@ _E ! / " "* " / " P ,/ &ρ & &λ µ&I _> K& \ >4G , ! ' $ N&dd( ?( b4c * " ! , J /7\> ' , N&>?( >H( b c ! * * ! ε \ >(> " Y ! " 7, $ /α \ ε 7α> \ >(>α> ∆ > \ @(4 _> \ >4J(@A ' ! $ " / F " " $ "/ ρ \ H H(>J ) E $ "/ µ \ 4(4?&>@ &!E ! " $ "/ λ \ @(J?J _E F α> \ >H??J(> _E 4F α \ 4>?G (G _E 4F + \ α I _>K \ G (H _ F* - & * & '/ qn − q F ε\ >@@L \ (@?L h AL I $ K qn A> $ & &e ! % = 188,0 _E 1 −4 + 5,565.10 + 21874,74 212,0 K= < % < % - % - % Qnt K ∆t log ^\ V % " % V ' " 15,93.1000 = = 1,36 188,0.62,15 \ >4G % & Bn " /C\ /7\> 4>( b c < WX )0 $ ( E " % " / d + d tr nπ n , " \ @(@H I K / \ ? % & C \ @(> \ @(@ ? H( b4c/ 78/ Z \ I7 >K O \ @(G & -= >& ' # < , F IN&> @K( F 78/ " / $ " / " " " / / )0 7X$T V$W / ($OT * ' # \ ?@ $ / ε \ @(4 \ @(@@@4 h1 = λ1 ' / λ> / ! ! / " % " > )0 >/ ξ> / # ! *^ / * l1 v + Σξ F d1 2g & # ( ( >\ \ @ \ @(@? > & " >&>& e * $ t FV + t FS 28 + 65,8 \ J(H = ^\ 2 " / " $ A4 " 7, / ' " " ,/ F " " $ / ρ \ H?H(4 ) E F " " $ / ρ[ \ GJ?( ) E xF − xF 0,1 − 0,1 ρ^ \ HJ>(J ) E / = + = + ρF ρR ρN 768,4 989,2 / µ \ A(>A&>@ &!E / µ[ \ (GA&>@ &!E / ^ µ O I> ^K µW µ^ \ (JA&>@ &!E N $ " " / 4G F 4.1000 vF = = \ @(@AG 3600 ρ F πd tr 3600.961,6.π 0,08 5 $ $ µ^ \ E! >&4& e ! ! / # ! [ !/ v F d tr ρ F 0,057.0,08.961,6 = \ H 4H(H g @@@ / Re F = µF 4,65.10 − $ ! " / [ \ JI >EεK?EG \ AJ ?(A> !) "7 Q % " * / HE? [ \ 44@&I >EεK \ >?J@HG( h[ ^h[ $ " * ") * + " # ! [ # ! [ N, [ /9 0' * d (PJeT * >& & e # ! # & ε 100 7U[T V$W/ λ>\ 0,1 1,46 + d1 Re F , 25 \ @(@ A / / ' $ dd&>J( ?4( b>c/ )0 H@ ξ > \ @(>A& J \ @(H J N / [ * " [E \ ,ξ > I> K \ @(>A& * N % * " $ , ξ* I> "K \ >@& 4* % ξ* \ >@& \ 4@ ) ) #K& C ) / ξ> \ @ I " N /ξ \> ' " " $ % *8/ ' $ >@( ?A( b>c/ ξ = 11 / ξ> \ (@A 30 0,057 / h1 = 0,035 \ G(JA&>@ I K + 33,05 0,08 2.9,81 ' # * ! $ " # 78 / A #" " " " = λ4 + Σξ & 4 ' / λ4 / ! ! / " % " )0 4/ ξ4 / # ! *4 / * !: : K ( ( 4\ # * - WX !:(: ' $ > ' $ N ' + & ' /*4 \ (AG&>@ E! , ' / \ G>@(H h @@ / Idd&J K( ' GH( b>c/ λ = $ % & 64 64 = = 0,09 Re 710,9 $ " / dd&>J( ?4( b>c/ F " >\ ξ $/ dd&>J( > & \ 4(A \ @(@ & & ' & # ! [ !/[ / ε \ @(@@@4 " ' + , !:!: *4 $4\ ξ / ξ4 \ ξ ,ξ I> K\ @( A? Fo 0,032 \ @(>J@ = F1 0,08 ,ξ $ I> K\ @(G@? @( A? ?4( b>c/ F " $ Fo 0,032 \ @(>J@ = F1 0,08 @(G@? Oξ $ \ >(>JJ (3,57.10 −3 ) 2,5 / h2 = 127 0,09 + 1,166 = 0,68.10 −3 2.9,81 0,032 ' # " h3 = λ3 ' / λ / ! ! / " % " / )0 ξ / # ! * /* &>& N l3 v + Σξ d3 2g ( ! " " ( & ( \ @(A & \ \ @(@ & # 78 & " " /*4 \ @(@@ A E! / &4& e ! ! # ! [ ! / [ \ 4A@ h @@/ / ε \ @(@@@4 WX Idd&J K( & &e ' # ! $ dd&>J( GH( b>c/ λ = # % 64 64 = = 0,256 Re 250 / ?4( b>c/ F " $/ $ dd&>J( Fo 0,032 \ @(>J@ = F1 0,08 ,ξ Fo 0,032 \ @(>J@ = F1 0,08 ,ξ I> K\ @( A? I> K\ @(G@? \ @( A? ξ ?4( b>c/ F " $ ξ $ \ @(G@? Oξ $ \ >(>JJ 0,5 0,003 + 1,166 = 0,30.10 −3 / h3 = 127 0,256 0,032 2.9,81 > / ξ \ ξ N $ / > ' / " % $ % *8 / 9 W Q I> >K Q I4 4K - $ " *8 , " 2 P1 P2 v1 v2 O \ q4 O O O q> O ρ F g g ρ F g g ⇔ q> \ q4 O Q < % *8& " $ & I> >K * I4 4K/ M> P2 − P1 v2 − v1 O + ρ F g g M> ' / q >/ I> >K ! * " ( " % \ q >& I4 4K ! * " ( " % q 4/ *8 " / q4 \ O OI >K&∆ \ @(>@A O @(@4 O I>4 >K&@(4A \ 4(?GA ! " I> >K( D> \ > \ H(?>&>@ E D> / D4 / ! " I4 4K e ∆D \ D4 D> \ C &∆DC \ H& 4?J(4G \ 4AGJ( E " I> >K( *> \ @ E! *> / * *4 / * " *8 " ( *4 \ *^ \ @(@AG E! # # I> >K I4 4K/ M> / \ ?(J &>@ M> \ > O O AA % *8 * - N / " % % 2 P2 − P1 v2 − v1 O + ρ F g g *8/ * \ q4 O \ 4(?GA O M> 2576,4 0,057 − + O ?(J &>@ 9,81.961,6 2.9,81 \ (>J 2*\A ( E) > R ! / " " & ^ \ 4? ' " " ,/ F " " $ / ρ \ HHJ( ) E F " " $ / ρ[ \ G? (? ) E xF − xF 0,1 − 0,1 / ρ^ \ HG@(4 ) E = + = + ρF ρR ρN 784,8 996,3 5 $ $ µ^ \ / µ \ ?( J&>@ &!E / µ[ \ @(A>&>@ &!E ^& µ O I> ^K& µW µ^ \ G( A&>@ &!E # $ " G 1000 \ >(@ E QF = F = ρ F 970,2 / V N / R ! 67 \ 4 " / E / / 9 WX Q I> >K Q I4 4K % % *8& , < " I> >K * I4 4K/ 2 P1 P2 v1 v2 O O 27 \ q O O O M> q> O ρ F g g ρ F g g ' / q >/ q 4/ D> / ! ! D4 / *>(*4 / * # M> / 27 / 4&>& '0 # - $ $ " " I> >K ! I4 4K ! I> I4 " - # $ * " ( q> \ > & * " ( q4 \ * \ A & >K( D> \ > & 4K( D4 \ > & I> >K * I4 4K( * >\ * \ @ I> >K I4 4K& & $ / AJ " E! & ' $ ' # $ ' )0 dd&>A( $ * # P ?>( b>c $ * # lh + lñ vF + Σξ h + Σξ ñ M> \ λ d tr 2g / / ε \ @(4 \ A@ \ @(@@@4 / / " % " " % & $ / " % ξ / # ξ / # λ/ ! *^ / * \J " # # ! /' $ # ( dd& ( \ (4 >( b>c \? 7 & # & # & * * " 4Qb 4.2 vF = = = 0,283 3600πd tr 3600.π 0,050 # E! E! ! ! * # / >> e # ! [ !/ v d ρ 0,283.0,05.970,2 Re F = F tr F = \ >G@A (? g @@@ / µF 8,05.10 − ! " / [ \ JI EεK?EG \ @>(@JA !) "7 Q % " * / [ \ 44@I EεKHE? \ >@HJG ( ?> h[ ^h[ $ " * ") * + $ " # ! [ # ! [ N, [ WX Idd&J K( >4 e ' ,ξ Bn Bn # # E ' / $ dd&>J( ?4( b>c/ > I> K \ @(>A& ξ > \ @( K / * % * " $ ξ*> \ >@ >* % / ξ \ ξ > O ξ*> \ >@( > e # E ' ' $ dd&>J( , ξ I> K \ @(>A& # & ε 100 GH( b>c/ λ \ 0,1 1,46 + d tr Re F , 25 \ @(@ / , ξ*> I> "K H@ )0 [ * " [E \ H@ )0 [ * " [E \ \ >@& # / / ?4( bAc/ AG Bn # ξ \ @(>A& \ @(J K / ' $ H&A( H ( b>c/ * % * " $ ξ*4 \ >@ Bn # >* % K , $ L /ξ*\> / ξ \ ξ > O ξ*> O ξ * \ >>(J 6+8 0,283 \ @(>4G N / M> \ 0,033 ⋅ + 10,3 + 11,6 0,05 2.9,81 4&4& '0 27 \ Iq4 q>K O , ξ*4 I> $ / M> \ I A >K O @(>4G \ (>4G ! " ! ! $ / η7 \ @(?& Q H ρ g 2.4,127.970,5.9,81 $ / \ b b F = 3600.η b 3600.0,8 /5 # $ $ ! / 67 \ E / 27 \ (>4G ! / \ 4G( _ F ' R ! " # \ 4G( _ " P A C 47 e>?2>@' % 9> \ 4> O O4 C ' % / O 70 94 \ ? 70 " O & O & " B *+5 / I Q K\ O & $ ( O ) 70 \ >J (?4 ) A? " " ( / "K \ >@& V % / \ >J I "K " % " ? / C> \ ? G " % " G@ / " % " >A@ / C \ >@ & " % " A@ / *8( " * < / 47 ,* +,' ' e>?2>@' ' ' < Bn ? Bn G@ Bn >A@ Bn A@ < WX ) " ) C ) I≥ A@ # " % / # " " 0* " % # # " " % K $ * " $ = " >@ & * " % " $ * @ & \ 4& 4G( \ A (J _ 6) % N e N # * ( I) K >J (?4 I) K >J I "K ? G I K >@ I K >@ I K @I K A (J I_K I "K I "K I "K A - ,* *6 JA " % & P 4@@L " % * >HA " % & A@@@@ I E) K >@@@@ I E) K 4A@@ I E "K A@@@@ I E K >@@@@@ I E K >@@@@@ I E K >@@@@@ I E K G@@@@@ I E2 K 4@@@@@ I E "K >A@@@@ I E "K >@@@@@@ I E "K & AH " $ $ I % * + d>e >4>G>A@@ >J ?4@@ >@@@@ >?A@@@@ >@@@@@@ >@@@@@@ @@@@@@ AJ@@@ @@@@@ A@@@@ 4@@@@@@ J HGAG@@ ! " # U ;+5* ' , N " R ! * " ! * " * % "* $ & " # " % " 78 () "* &< # % " J@ $" " # & ' " 78 ) % ( " $" $" " 78 # $ ( " ) ( " # ! * $" ! " "* % ' " " ) $ b>c& V # , * ' " 78 ' >( 52