Nama : SukartiniNIM : 2014.31.151Mata Kuliah : Ventilasi IndustriSesi : 10Dosen : Ir. Latar Muhammad Arif, MSc

Tugas Online 5

Gambar dibawah adalah pemetaan area pabrik B-YX, dan lay out proses operasi Laboratorium seperti pada gambar, (a) duct dari aluminum, black iron, stainless steel (b), terdiri dari dua hood, yang direncanakan untuk menangkap penyebaran kontaminan dilepaskan tanpa kecepatan . Tipe kanopi hood persegi panjang dengan sudut 450

No Urut : 17Air flow slot velocity : 350 fpmDuct velocity : 3.500 fpm

Tabel. 2,1 Ukuran detail ductDiameter berdasar perhitungan agar kecepatan aliran udara sesuai standar

UKURAN Potongan/Segmen DuctA -C B –C C -D D –E E –F

Diameter (inch) 26 26 33 34 34

Panjang (ft) 14 8 7 13 13

penyebaran kontaminan dilepaskan tanpa kecepatan, maka kecepatan tangkap (V) = 50 -100 fpm

Tabel -2.2 Ukuran Elbows

Nomor DetailKepatan tangkap

(fpm)Elbows Entries

A – C 50 – 100 1- 900

B – C 50 – 100 1- 900 1 - 300

D –E 50 – 100 1-600

HOOD – A Keterangan gambar detail hood - A

o Tinggi, X = 0.30 m (1 ft) (jarak dari sumber ke kanopi)o Sisi, D = 0,4 Xo Kecepatan tangkap (v1) = 50 -100 fpmo Luas Area Hood A (Af) = 8 x 29/144 = 1,611 ft2

Q = V (10 X2 + Af)

dimana,

V = kecepatan tangkap (50 – 100) fpmQ = debit hisapan hood (581 – 1.161) cfmX = 1 ftAf =1,611 ft2

HOOD – B

Keterangan gambar detail hood kanopi - B

o Tinggi, X = 0,6 m (2 ft) (jarak dari sumber ke konopi)o Sisi, D = 0,4 Xo Kecepatan tangkap, v1 = 50 - 100 fpmo Cross-Sectional Area Af = 7 x 28/144 = 1,361 ft2

Q = V (10 X2 + Af)

dimana,V = kecepatan tangkap (50 – 100) fpmQ = debit hisapan hood (578 – 1.156) cfmX = 2 ftAf =1,361 ft2

Tabel .2.3 Debit hisapan minimum dari setiap kanopi hood

Detail Hood Kecepatan tangkap

(fpm)

Debit tangkap(cfm)

Debit minimum

(cfm)

Hood A (Kanopi hood)` 50 - 100 594 – 1.188 650

Hood B (Kanopi hood) 50 - 100 578 – 1156 650

Tabel 2.4 Ukuran Utama Perencanaan

Nomor DetailDebit

Minimum(cfm)

Diameter Duct(inch)

Panjang/Lurus( ft)

Elbows Entries

A – C 1030 8 10 1- 900

B – C 2090 8 8 1- 900 1 - 300

C – D 3075 10 8C (air cleaner)D –E 3130 12 8 1-600

D (fan) 3130 - -

E – F 4150 14 6JAWAB

Nama/NIM : Sukartini/2014.31.151Tugas : Menurut Absen No.Urut : 17

1. DUCT SEGMEN IDENTIFIKASI satuan A-C B-C C- D D

2. Volume Aliran Udara/Volume Flow Rate : Q = VA cfm 1030 2090 3075

3. Minimum Transport Velocity fpm 1.188 1156

4. Maximum Duct Diamter/diameter pipa = D inci 8 8 10

5. Selected Duct Diamter/slesksi diameter pipa = D Inci 8 8 10

6.

Duct Area -- A = --- A =

ft2 0,3488 0,3488 0,5451 A

7. Kecepata alran Udara/ Actual Duct Velocity V = Q/A

fpm 2953 2953 1,8996 I

8. Duct Velocity Pressure/Tekanan Kecepatan

VP =

“ Wg 0,5436 0,5436 2,2497 R

9.

HOOD

SUCTIONS

SLOT

Maximum Slot Araea= (2/11) ft2 C

10. Slot Area selected ft2 L

11. Slot Velocity Vs fpm 350 350 E

12. Slot Velocity Pressure/Tekanan Kecepatan slot

VPs =

“ Wg 0,0803 0,0803 A

13. Slot Los Factor , fig.5-15 or Chap.10 1,78 1,78 N

14. Acceleration Factor 0 or 1 0 0 E

15. Slot loss per VP, item (13 +14) 1,78 1,78 R

16. Slot Static Pressure SP, item (12*15) “ Wg 1,8603 1,8603

17. Duct Entry Loss Factor, fig.5-15 or Chap.10

0,28

18. Acceleration Factor 0 or 1 1 1

19. Duct Entry Loss per VP, item (17 + 18) 1,00 1,28 0,00

20. Duct Entry Loss , item (8*19) 0,5436 0,6958 0,0000

21. Other Loss “ Wg 0,400

22. Hood Static Pressure SPh, item (16+20+21) “ Wg 2404 2556 0,0000 0,400

23. Panjang Pipa/Strainght Duct Length (= L) feet 10 8 8

24. Friction Factor( Hf),

Hf =

0,0341 0,0341 2194

25. Friction Loss per VP, item (23*24) 0,341 0,2728 17,552

26. No. of 900 Elbow 1 1

27. Elbow Coeficient (botton of page) 0,33 0,33

28. Elbow Loss per VP, item 26*Loss factor (botton of page)

0,3300 0,3300

29. No. of Branch Enteries 0 or 1 1,00 1,00 1,00

30. Entry loss Coeficient 0,28

31. Entry Loss per VP, item (29 x Loss Factor )(Branch) 0,28

32. Special Fitting Loss Factor

33. Duct Loss per VP, item (25 + 28 + 31+ 32) 0,671 0,8828 17,552

34. Duc Loss , item (8 *33) “ Wg 0,3648 0,4799 39,487

35. Duct SP Loss, item (22 + 34) “ Wg 2,404 2,556 39,487 0,400

36. Other Losses

37. Comulatif Static Presure “ Wg -2,404 -2,556 -39,487 -39,487

38. Goverming Static Presure (at to Location) “ Wg -0,6260 -0,0352

39. Corrected Volumetric Flow rate cfm

40. Corrected Velocity fpm

41. Corrected Velocity Pressure “ Wg

42. Resultant Velocity Pressure “ Wg

1. DUCT SEGMEN IDENTIFIKASI satuan

D- E E E-F

2. Volume Aliran Udara/Volume Flow Rate : Q = VA cfm 3130 3130 4150

3. Minimum Transport Velocity fpm

4. Maximum Duct Diamter/diameter pipa = D inci 12 14

5. Selected Duct Diamter/slesksi diameter pipa = D inci 12 14

6.

Duct Area -- A = --- A =

ft2 0,785 F 1,0684

7. Kecepata alran Udara/ Actual Duct Velocity V = Q/A fpm 1312 A 9640

8. Duct Velocity Pressure/Tekanan Kecepatan

VP =

“ Wg 0,3276N

5,7936

9.

HOOD

SUCTIONS

SLOT

Maximum Slot Araea= (2/11) ft2

10. Slot Area selected ft2

11. Slot Velocity Vs fpm

12. Slot Velocity Pressure/Tekanan Kecepatan slot

VPs =

“ Wg

13. Slot Los Factor , fig.5-15 or Chap.10

14. Acceleration Factor 0 or 1

15. Slot loss per VP, item (13 +14)

16. Slot Static Pressure SP, item (12*15) “ Wg

17. Duct Entry Loss Factor, fig.5-15 or Chap.10

18. Acceleration Factor 0 or 1

19. Duct Entry Loss per VP, item (17 + 18) 0,00 0,00

20. Duct Entry Loss , item (8*19) 0,0000 0,0000

21. Other Loss “ Wg

22. Hood Static Pressure SPh, item (16+20+21) “ Wg 0,0000 0,0000

23. Panjang Pipa/Strainght Duct Length (= L) feet 8 6

24. Friction Factor( Hf),

Hf =

0,01526 0,11135

25. Friction Loss per VP, item (23*24) 0,1220 0,6681

26. No. of 900 Elbow 0,67

27. Elbow Coeficient (botton of page) 0,24

28. Elbow Loss per VP, item 26*Loss factor (botton of page)

0,1608

29. No. of Branch Enteries 0 or 1 1 1

30. Entry loss Coeficient

31. Entry Loss per VP, item (29 x Loss Factor )(Branch)

32. Special Fitting Loss Factor

33. Duct Loss per VP, item (25 + 28 + 31+ 32) 0,2828 0,6681

34. Duc Loss , item (8 *33) “ Wg 0,0926 3,8707

35. Duct SP Loss, item (22 + 34) “ Wg 0,0926 3,8707

36. Other Losses

37. Comulatif Static Presure “ Wg -0,093 3,963

38. Goverming Static Presure (at to Location) “ Wg

39. Corrected Volumetric Flow rate cfm

40. Corrected Velocity fpm

41. Corrected Velocity Pressure “ Wg

42. Resultant Velocity Pressure “ Wg