Post on 22-Dec-2015
description
Tugas
1.Hitunglah luas regulator ( Ar ) jika diketahui :
d = 3 m
Q = 250.000 Cfm.
Hx = 2,25 ln.
Z = 2 ( Bundar dan halus ).
Penyelesaian
d = 3 m R = ½ . d
= ½ . 3 m
= 1,5 m
1 feet = 0,3 m.
1 m = .
1,5 m = 1,5 .
= 5 feet.
A = π R 2
= 3,14 . ( 5 feet )2
= 78,50 feet2
V =
=
= 3184,713 ft/mn
HV = ω
= 0,075
= 0,63095 ln.
X =
=
= 3,566.
N =
=
= 0,463
Ar = N . A
= 0,463 . 78,50 feet2
= 36,3455 feet2
2. Hitung luas bukaan ( A ) jika diketahui :
X = 2,4
Ar = 20 ft2
Hx = 2,25 in
Q = 100.000 cfm
Z = 2,5 ( segi empat )
Penyelesaian :
N =
=
= 0,463
A =
=
= 35,778 ft2
SOAL ;
Diketahui :
Q = 150.000 cfm
R1= 0,238.10-10 in mn2/ft R2=3,55.10-10 in mn2/ft
R3= 32.10-10 in mn2/ft
R4= 18,7.10-10 in mn2/ft
R5= 50.10-10 in mn2/ft
R6= 1,78.10-10 in mn2/ft
R7= 6,12.10-10 in mn2/ft
R8= 22,2.10-10 in mn2/ft
R9= 8,16.0-10 in mn2/ft
R10=75.10-10 in mn2/ft
R11= 0,408.10-10 in mn2/ftR12= 0,476.10-10 in mn2/ft
Ditanyakan :a. Q1, Q2, Q3, ........Q12b. Head 1 s/d 12c. Jumlah loope / meshd. Head statis
Jawab :
RCD =
Nilai Q1 s/d Q12