Slide Presentation HEX

8/17/2019 Slide Presentation HEX

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Universiti Kuala Lumpur

Malaysian Institute of Chemical and Bioengineering

TechnologyMini Project 2!"

Process #eat Transfer$CLB 2!%&

#eat '(changer )esign*

Creative Tu+e ,nd -hell

#eat '(changer

Muhammad ,shrul Bin Mohd .asir ""2!2!/0

Mohamad Lu1man #a1im Bin Md a1i ""2!2!/220

Mohamad ,3han -o+rie Bin Mohamad ,nuar ""2!2!/224

Mohamad -hamil Bin -ha5amry ""2!2!//6

Mohd 7arid Bin 8usri ""2!2!/2/6


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)'-I9. :# #',T ';C#,.9'<

Basic component of heat e(changer*I.Shell

II.Tubes

III.Front end headIV.Rear end head

V.Baffles


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)'-I9. :# #',T ';C#,.9'<

!= -hell-Used E-shell type because it cheapness and simplicity

-One pass shell

- iameter of shell is !." meter

-#en$th of shell is %." meter

- &aterial used is stainless-steel

2= Tu+es- Used nic'el alloy material

- (i$h conducti)ity of heat

- Usin$ * tubes in once shell

- iameter of tubes is "."+ meter - #en$th of tubes is ,." meter

- &ore lon$er tubes more effecti)e heat transfer

- foulin$ factor of tubes is ".""" m+ / 0-1


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)'-I9. :# #',T ';C#,.9'<

%= Baffles and 9eometry- To support tube for structural ri$idity

- To di)ert the flo2 across the bundletube to obtain hi$her heat transfercoefficient

- 3re)ent tube )ibration and sa$$in$

- Used trans)erse type layout- Usin$ * baffles to support tubes.

- Usin$ $eometry for s4uare tube layout

/= Tu+es layout

- usin$ s4uare layout- tubes an$le is %"


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)'-I9. :# #',T ';C#,.9'<

"= 7ront end stationary head types- usin$ B types

- Bonnet 5internal co)er6

>=


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)'-I9. :# #',T ';C#,.9'<


7/26

)'-I9. :# #',T ';C#,.9'<

Oil (Shell) Water (Tube)

Tin (°C) 125 25

Tout (°C) 89 45

Tf (°C) 107 35

Cp (kJ/kg.K) 2.25 4.178

Pr 230 4.83

μ (kg/.!) 0.009 0.720"10#3

$ (kg/3) 83% 994.0

& (2/!) 1.7"10#5 #

k ('/.K) 0.13% 0.%23

!! *o+rt, (kg/!) 45 28

-i,t,r () 3.0 0.02

The parameter from property ta+le and calculation


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)'-I9. :# #',T ';C#,.9'<

Length/tube (m) 9.0 8.0

o. of tu, (T) # %

,oit (/!) %.34%"10#4

,no6! nu,r (,) 17%.84 4%0.4%

u!!,t6! nu,r (u) 51.04 21.44

('/2.K) 2.214 434.11

r, (2) 84.82 3.02

Pr,!!ur, (r) 5.5 9

ouing ftor (2 °C '#1) 0.00021 0.0005

:ffii,n; < (=) 31=


9/26

)'-I9. :# #',T ';C#,.9'<

C,LCUL,TI:. :7 #',T ';C#,.9'< 7ssume temperature of (+Oout is 8"c/alculate the ener$y by usin$ this formula in the table9 consist of 2ater.

: ; m/p5


10/26

)'-I9. :# #',T ';C#,.9'<

7inding the LTM)

1 ; Thin - Tcout> ; 51+ C +?!A6- 5,% C +?!A6

;!* A

+ ; Thout - Tcin>

; 51"1.,% C +?!A6 5+ C +?!A6 ;?*.,% A

> > > ; 5,! ,?.86= ln 5,!=,?.86


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)'-I9. :# #',T ';C#,.9'<i& ,rea of tu+e

7 ; Dtube 5 #6

; * 5 > "."+m > , m6

; !."+ m+

ii& #eat flo? rate

: ; m /p %.,++ > 1"-!m=s

; "."1?* m=s

"."1?* > "."+=".?+">1"-!

; 8*".8*


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)'-I9. :# #',T ';C#,.9'<

)6 T a)$ ; 5+ C86=+

; !"c

3r 5prandtl Dumber6 at !"c from 2ater properties table9

3r ; 8.,!

)i6

Du ; +1.88

5/48/5

4/13/2

3/12/1

))282000

Re(1(

])Pr

4.0(1[

Pr Re62.03.0 +

+

+= x Nu

5/48/5

4/13/2

3/12/1

))282000

46.460(1(

])83.4

4.0(1[

)83.4()46.460(6.03.0 +

+

+= x Nu


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)'-I9. :# #',T ';C#,.9'<

Before loo'in$ to2ards the $raph of correction factor 5 F 6 9 2e calculateH-

R; 1.,

3 ; ".*

inout

out in

Twater Twater

toil Toil R

−

−=

2545

89125

−

−= R

inout

out in

Twater Twater

toil Toil P

−

−=

89125

2545

−

−

= P


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)'-I9. :# #',T ';C#,.9'<

From the $raph of correction

factor 5F6

/orrection Factor9 F; ".*

Du ; F.>Du 2ater

; ".* > +1.88

;1!.%!*

Du ; ho=' h ; Du.'=

( ; 1!.%!*> ".*+!="."+

; 8!8.11 2=m+'


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)'-I9. :# #',T ';C#,.9'<

i& ,rea of shell

7; #; 5!."m65%."m6

; ,8.,+ m+

ii& #eat flo? rate

: ; m/p +.+'@='$.A > 5


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)'-I9. :# #',T ';C#,.9'<

5/48/5

4/13/2

3/12/1

))282000

Re

(1(])

Pr

4.0(1[

Pr Re62.0

3.0 ++

+= x Nu

5/48/5

4/13/2

3/12/1

))282000

84.176(1(

])230

4.0(1[

)230()84.176(62.03.0 +

+

+= x Nu

Du ; 1."8

Du ; h1

A

h1 ; Du.'=; 1."85".1!*6=!."

; +.+18 2='


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)'-I9. :# #',T ';C#,.9'<

)0005.000021.0(11.434

1

214.2

1

1

+++

=U

U ; +.1%% 2=m+'

,rea of heat e(changer

: ; U7


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)'-I9. :# #',T ';C#,.9'<

'ffectiveness

/c ; mc /pc ; 5+,658.1?,6

; 11*.%,8 '@=A.s

/h ; mh /ph

; 5865+.+6 ; 1"1.+ '@='s

/c; /ma>/h; /min

/ ; /min =/ma>; 1"1.+= 11*.%,8

; ".,?


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)'-I9. :# #',T ';C#,.9'<

DTU ; U7s= /min

; 5+.1%%651%.?6=1"1.+

; ".8!

; ".!1> 1""K

; !1 K

)1(exp(,1)1(exp(1c NTU cc NTU ess Effectiven−−−

−−−=

)87.01(43.0exp(87.01

)87.01(43.0exp(1

−−−

−−−

=ess Effectiven


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P


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P


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Pchan$er usually operates correctly if the)alue of U re4uired 5Ba$i @.S etc9 +"1+6.

/ustomers usually li'e a product that 2or's for them in a lon$period.


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Pchan$er is used e>tensi)ely in )arious industrial applications totransfer heat from one medium to another.

The salient features include resistance from heat9 rust and corrosion9 hi$hperformance9 sturdy construction and durability.

urability is closely related to 2arranty.

The outer shell is made from durable9 hi$h stren$th metal9 haMard probabilitythat is stainless steel. Inner tubes re4uire an affecti)e combination of durability9 corrosion

resistance9 more foulin$9 hi$h pressure and thermal conducti)ity. The material used in de)elopin$ of tubes is nic'el alloy.


24/26

C:-T '-TIM,TI:.

7or shell Stainsless steels

222.braMete'.com=shell-tube-heat-

e>chan$ers

The price for the diameter !m and +m lon$ is

about R&*?.%8

Total price is H

%m > R&*?.%8=+m ; R&+.?!


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C:-T '-TIM,TI:.

7or tu+e Dic'el alloy

222.onlinemetals.com

The price for the diameter "."+m and !m lon$is about R&?8.+

Total price is H * tube > ,m R&?8.+=!m ;

R&1+9?+.!+


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chan$ersH Selection9 Ratin$and Thermal esi$n 5+nd Edition ed.6. /R/ 3ress. ISBD "-,8%!-"%"+-*.

Saunders9 E. 7. 51%,,6. (eat E>chan$esH Selection9 esi$n and/onstruction. De2 or'H #on$man Scientific and Technical.

3erry9 Robert (. and Preen9 on 0. 51%,86. 3erryQs /hemical En$ineersQ

(andboo' 5*th Edition ed.6. &cPra2-(ill.

II.InternethttpH==222.thomasnet.com=articles=process-e4uipment=heat-e>chan$er-

desi$n= 7ccessed on + &ay +"1.

httpH==222.lytron.com=Tools-and-Technical-Reference=7pplication-

Dotes=0hat-is-a-(eat-E>chan$er. 7ccessed on 1 &ay +"1.httpH==222.chemstations.com=content=documents=technicalarticles=shell.pdf.

7ccessed on 18 &ay +"1

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