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Heat Exchanger Design

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  • heater 1 tipe HE Shell n Tubefungsi untuk memanaskan aliran dari 313,5 ke 413 K

    423.15 K 423.15 K 1. Delta T LMTDTh 423.15Tc 313.5

    109.65delta T LMTD41.80989 K

    313.5 K 413 K 2. Neraca Energialiran dingin Fin 103468.46043

    40.5 Cpin 7241.9149999150 Q 749309.79563

    aliran Panas delta H 2745.4laju steam 10439.102685

    3. T LMTD koreksiR 0S 0.9074327405Ft 1delta LMTD75.257799899

    4. average temperaturHot Cold

    Hight 302 283.73Low 302 104.63Tav 302 Ftav 194.18 F

    5. luas permukaan perpanmiu campu 8.110007138Ud 100--500Q 28659512.513delta T LM 75.257799899A 1804.7280951

    6. dimensi designtube

    asumsiOD 1

    Nt A/(a"L) pitch 1.25lenght 16

    Nt tabel 432 Nt 430.84608841Ud correction 199.46578167 BWG 16

    tebakan Ud benar passes 4

    7. perhitungan shell n tube

  • shella. Flow areC'flow area 0.4583333333

    mass velocity2.204623

    WGa

    Reamiu steam 141.80464406

    0.14180464410.3431672386

    Dea 0.990.0825

    Rea 12071.579928

    jH fig 2860

    c Tav34.49337 J/mol K

    c 0.4577000478k 0.029329803(c miu/k )^(1/3)2.100565

    ho/psio 25.888804543

    tube Wall temptw255.7572 F

    miu pada wall131.5048 mkro poise0.131505 cP0.318242 lb/ft h

    psi o 1.0106128509corrected ho26.16356

    clean over all

  • Uc 12.773931461Ud 199.46578167Rd0.073271

    pressure dropshellRea 12071.579928f 0.002s 1.002004008De 2.75N+1 19.2delta P 0.0018316328

  • K F 423.15423.15 302 302 0

    413 363.25 104.63 283.73 179.110.15 197.37 18.27 179.1

    delta T LMTD75.2578 F

    Cp 276987.909096Kg/jam Fout 103468.5 Kg/jam Qin QoutJ/kg K Cpout 284229.8 j/KgK Fin Cpin delta T Fout Cpout delta TKJ/jam Qout 29408822 Kj/Kg 28659512.512771 28659512.51

    Qou-Qin 28659513 Kj/jam m 10439.10269Kj/KgKg/jam

    F

    5. luas permukaan perpancP aquos >2 cPsay 200 1 KJ 0.947817 BtuKj/jam 27163973.1713 Btu/hFft2 karena A>200ft2maka dipilih shell n tube

    shellin ID 33 in tabel 9in triangular B 10 inft passes 2

    tabel 9

    7. perhitungan shell n tube

  • tube4/L 0.25 in a. Flow areaft2 a' 0.594

    flow area 0.444310029aliran panassteam b. Mass velocity23014.28 lb/h w 228108.908450212.98 lb/h ft2 Gt 513400.3145

    Retmikro pois yaws miu stream 8.110007138cP 19.62621727lb/ft h D 0.87in fig 28 0.0725ft Ret 1896.52047

    L/D220.6896551724

    jH fig 24423.15 K 4

    1916.299 j/Kg Kbtu/lb F c 0.741976393W/m K 0.0169464468 btu ft/hFft2 k 0.067550665

    (c miu/k)^(1/3) 5.996056089hi/psii

    22.3469008216

    hio/psi19.4418037148

    398.3725 K

    miu pada walll shell1.361145 cP

    psi i 1.283856127corrected hio 24.96047883

  • btu/hft2F

    tubes 0.7246676126

    fig 29 Ret 1896.5204695238f 0.00045 fig 26

    ft delta Pt 2.155961637 psiV^2/2g' 0.03 fig 27

    psi delta Pr 0.6623726405 psidelta P total2.818334 Psi

  • Fout Cpout delta T

    untuk menghitung Nt butuh data a"a" 0.2618 ft/ft2 tabel 10 kernuntuk baffle adaBmax = ID shell 33 dipilih 10 inBmin = ID shell*0, 6.6

    persamaan 11.3

  • in2 tabel 10ft2

    lb/hlb/h ft2

    cPlb/ft hin tabel 10ft

    pati Tctav 363.25 K Mrfraksi Cp k Pc

    btu/lb h butanol 0.667791 2320.332 0.021841 lamdabtu ft/hFft2air 0.152881 4184.6 0.668622 Tr

    pati 0.171991 5200.955 0.00061 kptsa 0.004697 1919.94 0.000226impuritis 0.00264 5200.955 0.00061total 3106.507 j/kg K 0.116912 W/m K

    3.293971 lb/ft h

  • 437.2101 K pTSA Tc 441.8914162 Mr 190.22

    3816.706832 kpa Pc 4425.8543.120501615 lamda 3.068978

    0.8308362501 Tr 0.8220340.0006102947 W/m K k 0.000226 w/mK

  • cooler 1 tipe HE Shell n Tubefungsi untuk mendinginkan aliran dari 413 ke 343 K

    333 K 303 K 1. Delta T LMTDTh 413Tc 333

    80delta T LMTD

    57.7078 K

    413 K 343 K 2. Neraca Energialiran dingFin 29427.68996

    Cpin 293825.5643Q 8646607.61

    aliran Panadelta H -125.4laju steam 46705.93164

    3. T LMTD koreksiR 2.333333333S 0.272727273Ft 0.880794695delta LMTD 91.49170592

    4. average temperaturHot Cold

    Hight 283.73 139.73Low 157.73 85.73Tav 220.73 Ftav 112.73 F

    5. luas permukaan perpanmiu campu 0.914253447

    Ud koreksi Ud 50-12569.64011 Q 5856923.828

    delta T LM 91.49170592A 866.7909579

    6. dimensi designtube

    asumsiOD 1pitch 1.25lenght 16Nt 206.9306145BWG 16passes 2

    7. perhitungan shell n tube

  • shella. Flow areC'flow area 0.322916667

    mass velocity

    WGa

    Reamiu steam

    0.9142534472.212493342

    Dea 0.990.0825

    Rea 7491.428543

    jH fig 2850

    c TavCp

    c 0.687333496k 77.63920221(c miu/k )^(1/3)0.141304

    ho/psio 46159.21274

    tube Wall temptw219.4451 F

    miu pada wall0.012094 0.9890530.016516 0.002966 0.935193 cP0.962108 0.95 2.263168 lb/ft h0.009281 0.989053 psi o 0.9968346350.935193 corrected ho

    46013.1

    clean over all

  • Uc 549.5061931Ud 250Rd

    -0.00218

    pressure dropshellRea 7491.428543f 0.002s 0.991357761De 1.9375N+1 19.2delta P 0.030046405

  • K F 423.15343 283.73 157.73 126303 139.73 85.73 54

    40 144 72 72delta T LMTD103.874043 F

    Kg/jam Fout 29427.69 Kg/jamJ/kg K Cpout 94797.9194 j/KgKKJ/jam Qout 2789683.78 Kj/Kg

    Qou-Qin -5856923.8 Kj/jamKj/KgKg/jam

    F

    Tav 220.73fraksi denitas

    pati 0.012094 1686.7825. luas permukaan perpan ptsa 0.016516 1388.889

    cP medium organic BG 0.962108 990say 70 impuritis 0.009281 1388.889Kj/jam 5551292.839 Btu/h total 1008.718Fft2 karena A>200maka dipilih shell n tube

    shell untuk menghitung Nt butuh data a"in ID 23.25 23.25 tabel 9 a"in squar B 10 in untuk baffle adaft passes 1 Bmax

    Bmin

    tabel 9

    7. perhitungan shell n tube

  • tube4/L 0.25 in a. Flow areaft2 a' 0.594 in2

    flow area 0.426794 ft2aliran panas

    b. Mass velocity64875.86 lb/h w 102969 lb/h200905.9 lb/h ft2 Gt 241261.3 lb/h ft2

    Ret tav 318miu stream 0.605111 cP

    cP 1.464369 lb/ft hlb/ft h D 0.87 inin fig 28 0.0725 ftft Ret 11944.69

    L/D220.6896552

    jH fig 24377.85 K 80

    2877.728 j/Kg Kbtu/lb F c 0.997872 btu/lb hW/m K 539btu ft/hFft2 k 0.3644 btu ft/hFft2

    (c miu/k)^(1/3) 1.588726hi/psii638.8214266

    hio/psi555.7746411

    318.2598 K

    miu pada walll shell0.602216135 cP 1.457363

    psi i 1.000672corrected hio 556.1479

  • btu/hft2F

    tubes 1.002004008

    fig 29 Ret 11944.69393f 0.0002 fig 26

    ft delta Pt 0.098171539 psiV^2/2g' 0.042 fig 27

    psi delta Pr 0.335328 psidelta P total

    0.4335 Psi

  • 104.85 377.85F pati Tc 437.2101 Kviskositas Cp k Mr 1620.018697 5754.207 128.9652 Pc 3816.707 kpa0.000961 2022.442 106.6236 lamda 3.120502

    0.95 2828.501 76.00129 Tr 0.864230.000961 5754.207 128.9652 k 128.9652 W/m K0.914253 2877.728 77.6392

    untuk menghitung Nt butuh data a"0.2618 ft/ft2 tabel 10 kern

    untuk baffle ada= ID shell 23.25 dipilih 10 in= ID shell/5 4.65persamaan 11.3

  • tabel 10

    tabel 10

    75.20201 4177.889 J/Kg Kbtu ft/hFft2 0.63068 W/m K

    lb/ft h

  • pTSA Tc 441.8914 BG Tc 441.8914Mr 190.22 Mr 263Pc 4425.854 Pc 4425.854lamda 3.068978 lamda 3.60864Tr 0.855074 Tr 0.855074k 106.6236 w/mK k 76.00129

  • heater 1cooler 1

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