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Z Z 1  = 0 Z 2  = Z dZ 2 1 Air panas Air dingin Udara masuk Udara keluar Q
PROFIL TEMPERATUR 0 Z DASAR MENARA PUNCAK MENARA tubuh gas tubuh cairan TINGGI  MENARA
PROFIL ENTHALPY 0 Z DASAR MENARA PUNCAK MENARA tubuh gas pd temp. t G tubuh cairan pd temp. t L TINGGI  MENARA
PROFIL ABSOLUTE HUMIDITY 0 Z DASAR MENARA PUNCAK MENARA tubuh gas Antar batas,  gas jenuh pada  t i TINGGI  MENARA
NERACA MASSA KOMPONEN  A  NERACA ENTHALPY  ADIABATIS     Q = 0  NERACA OVER-ALL  (14)  (15)  (16)
NERACA DIFERENSIAL PANAS SENSIBEL PANAS LATEN (17)  (18)  (19)  NERACA ENTHALPY  PERUBAHAN ENTHALPY PADA TUBUH GAS :
LAJU PERPINDAHAN PANAS SENSIBEL : FILM CAIRAN : FILM GAS : LAJU PERPINDAHAN PANAS LATEN PADA FASE GAS : LAJU PERPINDAHAN PANAS LATEN SEBANDING DENGAN LAJU PERPINDAHAN MASSA (20)  (21)  (22)  (23)
(17) & (18) (24)  (25)  PERSAMAAN GARIS OPERASI Pada koordinat H vs t L , melalui titik 1 (dasar menara) dan titik 2 (puncak menara, dengan slope LC L /G s
2 1 Grs operasi  Kurve kest.  t L2 t L1 H’ 2 H’ 1 H’* 1 H’* 2 H’ Temperatur cairan (t L ) Heat transfer  potential t W1 range approach t G1 t G2 PUNCAK MENARA DASAR MENARA 1 2
(21) & (23)    (19) (26)  (27)  (28)
(28) DIINTEGRALKAN (29)  Gabungan (27) , (18) ,  (20) , (28) (30)  (31)
A B Grs operasi  Kurve kest.  t L2 t L1 H’ 2 H’ 1 H’* 1 H’* 2 H’ Temperatur cairan (t L ) slope =  H’* PUNCAK MENARA DASAR MENARA H’ Enthalpy driving force t L slope =
KURVE KESETIMBANGAN LURUS   & Koefisien individual Koefisien over-all perpindahan massa Pers (30) menjadi : (32)  (33)
=  Over-all height of transfer  =  Over-all number of transfer unit, menyatakan berapa kali perubahan enthalpy dalam menara akan terbagi oleh enthalpy driving force rata2  TINGGI MENARA : (34)
t L1 t G1 t L2 t G2 H’ t METODE GRAFIS (Mickley) t G2  ? H’ 1 H’ 2 slope =
t L1 t G1 t L2 t G2 H’ t METODE GRAFIS (Mickley) t G2  ? H’ 1 H’ 2

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Kul Humidifikasi 5

  • 1. Z Z 1 = 0 Z 2 = Z dZ 2 1 Air panas Air dingin Udara masuk Udara keluar Q
  • 2. PROFIL TEMPERATUR 0 Z DASAR MENARA PUNCAK MENARA tubuh gas tubuh cairan TINGGI MENARA
  • 3. PROFIL ENTHALPY 0 Z DASAR MENARA PUNCAK MENARA tubuh gas pd temp. t G tubuh cairan pd temp. t L TINGGI MENARA
  • 4. PROFIL ABSOLUTE HUMIDITY 0 Z DASAR MENARA PUNCAK MENARA tubuh gas Antar batas, gas jenuh pada t i TINGGI MENARA
  • 5. NERACA MASSA KOMPONEN A NERACA ENTHALPY ADIABATIS  Q = 0 NERACA OVER-ALL (14) (15) (16)
  • 6. NERACA DIFERENSIAL PANAS SENSIBEL PANAS LATEN (17) (18) (19) NERACA ENTHALPY PERUBAHAN ENTHALPY PADA TUBUH GAS :
  • 7. LAJU PERPINDAHAN PANAS SENSIBEL : FILM CAIRAN : FILM GAS : LAJU PERPINDAHAN PANAS LATEN PADA FASE GAS : LAJU PERPINDAHAN PANAS LATEN SEBANDING DENGAN LAJU PERPINDAHAN MASSA (20) (21) (22) (23)
  • 8. (17) & (18) (24) (25) PERSAMAAN GARIS OPERASI Pada koordinat H vs t L , melalui titik 1 (dasar menara) dan titik 2 (puncak menara, dengan slope LC L /G s
  • 9. 2 1 Grs operasi Kurve kest. t L2 t L1 H’ 2 H’ 1 H’* 1 H’* 2 H’ Temperatur cairan (t L ) Heat transfer potential t W1 range approach t G1 t G2 PUNCAK MENARA DASAR MENARA 1 2
  • 10. (21) & (23)  (19) (26) (27) (28)
  • 11. (28) DIINTEGRALKAN (29) Gabungan (27) , (18) , (20) , (28) (30) (31)
  • 12. A B Grs operasi Kurve kest. t L2 t L1 H’ 2 H’ 1 H’* 1 H’* 2 H’ Temperatur cairan (t L ) slope = H’* PUNCAK MENARA DASAR MENARA H’ Enthalpy driving force t L slope =
  • 13. KURVE KESETIMBANGAN LURUS  & Koefisien individual Koefisien over-all perpindahan massa Pers (30) menjadi : (32) (33)
  • 14. = Over-all height of transfer = Over-all number of transfer unit, menyatakan berapa kali perubahan enthalpy dalam menara akan terbagi oleh enthalpy driving force rata2 TINGGI MENARA : (34)
  • 15. t L1 t G1 t L2 t G2 H’ t METODE GRAFIS (Mickley) t G2 ? H’ 1 H’ 2 slope =
  • 16. t L1 t G1 t L2 t G2 H’ t METODE GRAFIS (Mickley) t G2 ? H’ 1 H’ 2