SCHEDULE OF FIRE FIGHTING PUMPS & HEAD CALCULATIONS
Total
Flow Pumping Remark/
S. No. Description of Pump Qty. Motor KW Motor
Rate Head Location
KW
A. FIRE FIGHTING PUMPS LOCATED IN FIRE PUMP ROOM AT BASEMENT-2
Electrical Driven Hydrant 2850 pump Room
1. 110M 1 No. 106 KW 106 KW
Pump LPM (Basement-2)
Electrical Driven Sprinkler 2850 pump Room
2. 110 M 1 No. 106KW 106 KW
Pump LPM (Basement-2)
2850 pump Room
3. Diesel Driven Fire Pump 110 M 1 No. - -
LPM (Basement-2)
Electrical Driven Jockey 180 24.00 pump Room
4. 110 M 2 No. 12.00 Kw
Pump LPM Kw (Basement-2)
Electrical Driven Curtain 2280 pump Room
5. 30 M 1 No. 40 Kw 40 Kw
Nozzle Fire Pump LPM (Basement-2)
DETAIL OF WATER CURTAIN NOZZLE PUMP
[A] Horizontal Mounted Downward Flow Open Nozzle:
• Total Length of Pipe Network for water curtain in one zone = 84 m
• Spacing between Open Nozzles = 2.5 m C/C [Nozzle
Manufacturer recommends 2 m for better performance]
• Nos. of Open Nozzles = 84
2.5
= 34 Nos.
• The flow through each nozzle is calculated by formula.
Q = K x P (As per IS: 9972/ NFPA 13)
Where
Q = Flow in lpm flowing through nozzle
K = Nozzle Factor = 45 (As per manufacturer HD Fire)
P = Total Pressure in Bar at flow Q = 1.6 bar
Q = 45 x 1.6 = 56.92 lpm
• Total Flow rate required =34 Nos. Nozzle x 56.92 lpm Flow on each
nozzle.
=1935 LPM
= 116.11 m3/Hour
Maximum water curtain Pump capacity required= 1935 LPM = 116.11 m3/hour
Capacity of pump proposed = 2280 lpm =137 m3/hour
PUMP HEAD CALCULATIONS FOR WATER CURTAIN
Head requirement for Fire Pump has been decided as below
As Per water curtain requirement, there shall be minimum pressure of 1.6 kg/sq.cm at the last water
curtain
Note: Considering that basement shall be provided the water curtain system: Total
Vertical Length of Pipe from Plant Room to remotest water curtain =9M
Total Horizontal Length of Pipe from Plant Room to remotest water curtain= 50 M
Total Length of Pipe from Plant Room to remotest water curtain = 59 M
Equivalent Length of Pipe Due to Fittings @ 10 % =6M
Total Length of Pipe = 65 M
Say = 65 M
Design calculation for total pump head requirement as per using following pipe diameter.
S. No. Description Pipe Diameter 150 mm
01. Total length of pipe 65 m
02. Required residual head 16 m
03. Static Head 9m
04. Head loss in Pipe 2m
(As per Hazen William’s Formula)
Referring Annexure-II
05. Total (2) + (3) + (4) 27 m
06. Head of Pump provided 30 m
2
Head Loss Calculations -Annexure -II
Hazen William’s formula
H= 6.05 x 10^5 x Q^1.85 x L
C^1.85 x d^4.87
Where L = Length of pipe in meters = 65 m
Q = Discharge in Lpm = 1280 Lpm
C = 120
D = Dia. of pipe in mm = 150 mm
H = Head loss in bar.
Putting these values in the above formula:
H= 6.05 x 10^5 x 2280^1.85 x 65
120^1.85 x 150^4.87
= 0.23 bar
Say = 2
PUMP HEAD CALCULATIONS
Head requirement for Fire Pump has been decided as below
As Per NBC Rule, there shall be minimum pressure of 3.5kg/sq.cm at the highest Fire
Hydrant:
Note: Considering that Tower shall be provided the Fire fighting system:
Total Vertical Length of Pipe from Plant Room to remotest Fire Hydrant = 64 M
Total Horizontal Length of Pipe from Plant Room to remotest Fire Hydrant = 80 M
Total Length of Pipe from Plant Room to remotest Fire Hydrant = 144 M
Equivalent Length of Pipe Due to Fittings @ 10 % =14.4 M
Total Length of Pipe = 158.4 M
3
Say = 159 M
Design calculation for total pump head requirement as per using following pipe diameter.
S. No. Description Pipe Diameter 150 mm
01. Total length of pipe 159 m
02. Required residual head 35.0 m
03. Static Head 64 m
04. Head loss in Pipe 9m
(As per Hazen William’s Formula)
Referring Annexure-II
05. Total (2) + (3) + (4) 108 m
06. Head of Pump provided 110 m
Head Loss Calculations -Annexure -II
Hazen William’s formula
H= 6.05 x 10^5 x Q^1.85 x L
C^1.85 x d^4.87
Where L = Length of pipe in meters = 159 m
Q = Discharge in Lpm = 2850 Lpm
C = 120
D = Dia. of pipe in mm = 150 mm
H = Head loss in bar.
Putting these values in the above formula:
H= 6.05 x 10^5 x 2850^1.85 x 159
120^1.85 x 150^4.87
= 0.85 bar
Say = 9 M
A) Suction Header size for Sprinkler , Hydrant ,Diesel & water curtain pump:
Flow rate Q for Sprinkler & Hydrant pump = 2850 LPM
4
= 171 M3/Hr
No. of Pumps = 2No.
Flow rate Q for Water = 2280 LPM
Curtain pump = 136.8 M3/Hr
No. of Pumps = 1No.
Total Flow Rate = 0.133M3/s
Considered water velocity (v) = 1.5m/s
Suction pipe = 2 Nos.
Flow rate Q = Area x velocity
= Axv
D ( considering 2 nos. suction pipe) = √4Q/π v
= 0.250m
= 250mm
* Say = 250mm- 2 Nos
B) Delivery Header size for Sprinkler, Hydrant , Diesel & Water curtain Pump:
Flow rate Q for Sprinkler = 2850LPM
& Hydrant pump = 171M3/Hr
No. of Pumps = 2No.
Flow rate Q for Water = 2280LPM
Curtain pump = 136.8M3/Hr
No. of Pumps = 1No.
Total Flow Rate = 0.133M3/s
Considered water velocity (v) = 3m/s
Flow rate Q = Area x velocity
= Axv
d =
= 0.250m
= 250mm
Say = 250mm
C) Individual Suction Header size for Sprinkler , Hydrant ,Diesel pump:
Flow rate Q = 2850LPM
= 171M3/Hr
Considered water velocity (v) = 1.5m/s
Flow rate Q = Area x velocity
5
= Axv
d = √4Q/π v
= 0.200m
= 200mm
Say = 200mm
D) Individual Delivery Header size for Sprinkler , Hydrant ,Diesel pump:
Flow rate Q = 2850LPM
= 171M3/Hr
Considered water velocity (v) = 3m/sec
Flow rate Q = Area x velocity
=Axv
d =
= 0.142m
= 142mm
Say = 150mm
E) Suction size of jockey pumps :
Flow rate Q = 180LPM
= 10.8M3/Hr
= 0.003M3/s
Considered water velocity (v) = 1.5m/s
Flow rate Q = Area x velocity
=Axv
d = √4Q/π v
= 0.080m
= 80.02mm
Say = 80mm
F) Delivery size jockey pumps:
Flow rate Q = 180LPM
= 10.8M3/Hr
= 0.003M3/s
Considered water velocity (v) = 3m/s
Flow rate Q = Area x velocity
=Axv
d = √4Q/π v
= 0.065m
= 65.01mm
Say = 65mm
G) Individual Suction Header size for Water curtain Pump:
Flow rate Q = 2280 LPM
= 136.8 M3/Hr
Considered water velocity (v) = 1.5 m/s
6
Flow rate Q = Area x velocity
= Axv
d = √4Q/π v
= 0.200 m
= 200 mm
Say = 200 mm
H) Individual Delivery Header size for Water curtain pump:
Flow rate Q = 2280 LPM
= 136.8 M3/Hr
Considered water velocity (v) = 3 m/sec
Flow rate Q = Area x velocity
= Axv
d =
=
= 0.150 m
= 150 mm
Say = 150 mm
