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Head loss calculation for CIRCULATION PUMP Computed By : Karthy
Head loss calculation using ( 1 ) COLBROOK Formula
no. mm m mm GPM l/s 0.2
0.6
8.0
2.0
0.2
0.3
0.9
0.5
2.0
1.0 1/1 m m/s 1/1 1/1 m m m m m m
Suction 4" cop 98 20 0.01 160 10.1 1 2 1 1.7 1.3372 131004.83 0.01763 1.64 0.33 0.155 0.48 0.48 0.483
" 4" cop 98 6 0.01 318 20 2 2 2 1 1 5.3 2.6577 260372.09 0.01577 5.79 0.35 1.908 2.26 2.26 2.256
Discharge 4" cop 98 31 0.01 318 20 4 1 2.1 5.8 2.6577 260372.09 0.01577 5.79 1.8 0.756 2.55 8.35 8.352
" 4" cop 98 3 0.01 160 10.1 1 1 2 1 1.3372 131004.83 0.01763 1.64 0.05 0.091 0.14 0.14 0.14
TOTAL 60 4 1 10 1 5.8 2.52 2.91 5.43
Static head = 5.80 m
friction loss for pipes and fittings = 5.43 m
dynamic head = 11.23 m
TENDER 20 L/s @ 15 m
RECOMMENDED HEAD WITH 10% SAFETY = 13 m
tee
reducer
gate valve
no. part of pipe
DN Nominal diameter
Butterfly valve
ID Pipe Inner diameter
L Pipe length
K Pipe roughness
Q Flow rate
11.23
dh(1) Liner loss
Strainer
discharge outlet
Accumulative Pressure
DH Total loss
Total heal (DH+GH) / pipe
V Mean Velocity
RE Reynolds number
Total local factors
DN
check valve
Loss m per 100 m
dh(2) Local loss
GH Static heal
F Liner loss factor
Balance valve
Local factors of fittings
elbow ( 45 leg.)
elbow ( 90 leg.)