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