Intercambiador De Calor (excel.xls)

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DATOS

mºcaliente2500 Tfe mºfrio 4000 Tfs mºcaliente 20129.33 mºfrio 33202.22 Datos del Intercambiador de Calor TUBOS L= 16 1.33 Di= 0.83 0.07 De= 1 0.08

2

Tmc= 195 Cc= Tmf= 91.96 Cf= mºc*Cc*(Tce-Tcs)=mºf*Cf*(Tfs-Tfe)

Fluido Frio Tmf= 91.96 Cp 1 K 0.36 u 1.8 ρ 62.1

Pt= C=

Temperatura: Frio Caliente 70 Tce 230 113.93 Tcs 160

110

CARCAZA B= 6 DI= 20 Nt= 158 Np= 2

1 1 Tfs=

113.93

Fluido Caliente Tmc= 195 Cp 1 K 0.39 u 0.76 ρ 60.24

3 Calculo de Variacion de temperatura logaritmica ∆T1=Tce-Tfs 116.07 ∆T2=Tcs-Tfe 90 ∆Tml=(∆T2-∆T1)/ln(∆T2/∆T1) ∆Tml= 102.49

0.5 1.67

Q=

###

0.1 1.25 0.02

Factor de Correccion R=(Tce-Tcs)/(Tfs-Tfe) 1.59 P=(Tfs-Tfe)/(Tce-Tfe) 0.27 ∆Tml*F= 4

Del Grafico 0.95

F= 97.26

Calculo del Area de flujos del tubo y coraza Fluido Frio

At=a(Nt/np) a=πDi^2/4 Deq=Di

Fluido Caliente

0.3 0 0.07

Ac=DI*C*B/Pt

0.17

Deq=4(√3/2*Pt^2-π/4*De^2)/πDe 0.06 Calculo de la Velocidad Masica:

5

TUBO Gf=mºf/aT ###

CORAZA Gc=mºc/Ac ###

6

Calculo del Nº de Re TUBO CORAZA Ref=Di*Gf/uf Rec=Deq*Gc/uc ### 9611.52 7

L/Di=

Determinando Jh 18

49

8 Hallando el Coeficiente de Pelicula hi=Jh(K/Deq)^1/3*Pr(u/uc)^0.14 ho=Jh(K/Deq)^1/3*Pr(u/uc)^0.14 Pr=Cp*u/K Pr=Cp*u/K Pr= 5.02 Pr= 1.94

230.22

hi=

156.2

Corregido=hio=hi(Di/Do)

ho=

177.64

hio=

130.27

9 Calculo del Coeficiente Global Limpio (uc) uc=hio*ho/(hio+ho) uc=

75.16

10 Calculo del Coeficiente global de diseño (ud) 1/uD=1/uc+RD

RD=

0.03

Area lateral total de los tubos L=2*pi*r=pi*De nt=numero de tubos De=Di+2e

Q=ud*AD*∆Tml(F)=mºc*Cc*(Tce-Tcs)=mºf*Cf*(Tfs-Tfe) A=nt(pi*De)*L uD= 21.96 661.83 11 Calculo del Factor de Distraccion (RD)/Factor de Obstruccion RD=(uL-Ud)/(uL*uD) RD=Rdc+Rdo RD=

0.03

CALCULO DE LA CAIDA DE PRESION: ∆PT=∆Pt+∆Pr Tubos: Coraza: ∆Pt=f*G^2*L*Np/((5.22*10^10)*Di*ØT) ∆Pt=f*G^2*L*(N+1)/((5.22*10^10)*Deq*δ*Øc) f= 0 f= 0 ∆Pt= 0.04 0.62 u=G/ρ 1784.08 ∆Pr=2.077*10^-9*Np*u^2/δ ∆Pr 0.01 0.05

DATOS mºcaliente2500 mºfrio 4000

Tfe Tfs

Temperatura: Frio 70 Tce 113.93 Tcs

Caliente 230 160

Datos del Intercambiador de Calor 1 pulgada 14 BWG L= 16 1.33 Di= 0.83 0.07 De= 1 0.08 Tmc= Tmf=

195 91.96

Cc= Cf=

mºc*Cc*(Tce-Tcs)=mºf*Cf*(Tfs-Tfe) Tfs= 113.93 Fluido Frio Fluido Caliente Tmf= 91.96 Tmc= 195 Cp 1 1 K 0.36 0.39 u 1.8 0.76 ρ 62.1 60.24

1 1

DI=

20

1.67

Pt=

1.25

0.1

110

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