STATIC PRESSURE CALCULATION - FAHU
Project : Al Ghadeer
Building : Sabil&Waha T1
Equipment Ref : FAHU-T1-01(SUPPLY FAN)
Serving Area : Ground Floor to Roof
Velocity
Air Flow
Duct Size (mm) Length Velocity Pressure
Reference Rate Friction
(Vp) Loss Coefficient For Item Pressure Loss
Sl.No Duct Element Points Loss
Fittings (Pa)
(Pa/m) V2 x
W1 H1 W2 H2 L/Sec m M/Sec
0.602(Pa)
SUPPLY AIR
1 Straight Duct 500 350 500 350 750 75 0.8 4.29 11.06 60.000
2 Transition 600 450 500 350 750 4.29 11.06 0.06 0.663
3 Straight Duct 600 450 600 450 1500 1.5 0.8 5.56 18.58 1.200
4 Transition A to B 650 450 600 450 1500 5.56 18.58 0.06 1.115
(Gr.Floor
5 Straight Duct ducting) 650 450 650 450 1860 1.5 0.8 6.36 24.34 1.200
6 Elbow 650 450 650 450 1860 6.36 24.34 0.18 4.382
7 Straight Duct 650 450 650 450 1860 1.5 0.8 6.36 24.34 1.200
8 Elbow 650 450 650 450 1860 6.36 24.34 0.18 4.382
23 Straight Duct 650 450 650 450 1860 3.8 0.8 6.36 24.34 3.040
24 Transition 850 450 650 450 1860 5.51 18.28 0.06 1.097
B to C
25 Straight Duct (Riser 850 450 850 450 2720 3.8 0.8 7.11 30.44 3.040
ducting)
Transition 1100 450 850 450 2720 6.20 23.14 0.06 1.388
Straight Duct 1100 450 850 450 3350 1.5 0.8 8.76 46.18 1.200
28 Elbow 1100 450 850 450 3350 7.64 35.10 0.18 6.317
29 Straight Duct 1100 450 850 450 3350 1.5 0.7 8.76 46.18 1.050
30 Elbow 1100 450 850 450 3350 7.64 35.10 0.18 6.317
31 Straight Duct 1100 450 850 450 3350 3 0.7 8.76 46.18 2.100
32 Elbow 1100 450 850 450 3350 7.64 35.10 0.18 6.317
33 Straight Duct 1100 450 850 450 3350 15 0.7 8.76 46.18 10.500
34 Transition 1100 450 600 600 3350 7.84 36.97 0.08 2.957
Total 119.466
General accessories
1 Sand trap louver 70
2 Motorized Damper 40
3 HRW 156
4 Heat Pipe 80
5 Bag filter 338
6 Cooling Coil 227
7 Fire dampers(3#) 70
8 VCD(2#) 40
1021.000
Total Pressure Drop 1140.47
Total Static Pressure Loss for Duct & Duct Accessories (Pa) 1140.47
Safety Factor 15% 171.07
TotalStatic Pressure Loss for Duct & Duct Accessories including Safety Factor (Pa) 1311.54
SELECTED STATIC PRESSURE FOR: SUPPLY FAN,FAHU-T1-01 1395.00
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STATIC PRESSURE CALCULATION - FAHU
Project : Al Ghadeer
Building : Sabil&Waha T1
Equipment Ref : FAHU-T1-01(RETURN FAN)
Serving Area : Ground Floor to Roof
Velocity
Air Flow
Duct Size (mm) Length Velocity Pressure
Reference Rate Friction
(Vp) Loss Coefficient For Item Pressure Loss
Sl.No Duct Element Points Loss
Fittings (Pa)
(Pa/m) V2 x
W1 H1 W2 H2 L/Sec m M/Sec
0.602(Pa)
RETURN AIR
1 Straight Duct 150 150 150 150 60 1.5 0.8 2.67 4.28 1.200
Elbow 150 150 150 150 60 2.67 4.28 0.17 0.728
Straight Duct 150 150 150 150 60 4.5 0.8 2.67 4.28 3.600
Elbow 150 150 150 150 60 2.67 4.28 0.17 0.728
Straight Duct 150 150 150 150 60 4 0.8 2.67 4.28 3.200
A to B
Elbow (Floor& 150 150 150 150 60 2.67 4.28 0.17 0.728
Straight Duct Riser 150 150 150 150 60 1.5 0.8 2.67 4.28 1.200
ducting)
2 Transition 250 150 150 150 60 2.67 4.28 0.06 0.257
3 Straight Duct 250 150 250 150 120 3.9 0.8 3.20 6.16 3.120
4 Transition 250 200 250 150 120 3.20 6.16 0.06 0.370
5 Straight Duct 250 200 250 200 180 5 0.8 3.60 7.80 4.000
6 Elbow 250 200 250 200 180 3.60 7.80 0.17 1.326
9 Straight Duct 250 200 250 200 180 1.8 0.8 3.60 7.80 1.440
10 Elbow 250 200 250 200 180 3.60 7.80 0.17 1.326
11 Straight Duct 250 200 250 200 180 3.5 0.8 3.60 7.80 2.800
14 Transition 400 200 250 200 180 2.77 4.62 0.06 0.277
15 Straight Duct 400 200 400 200 300 9 0.8 3.75 8.47 7.200
16 Transition 400 250 400 200 300 3.33 6.69 0.06 0.401
17 Straight Duct 400 250 400 250 540 3.5 0.8 5.40 17.55 2.800
26 Elbow 400 250 400 250 540 5.40 17.55 0.18 3.160
27 Straight Duct 400 250 400 250 540 2.6 0.8 5.40 17.55 2.080
B to C
28 Elbow (Roof 400 250 400 250 540 5.40 17.55 0.18 3.160
ducting)
29 Straight Duct 400 250 400 250 540 1.5 0.8 5.40 17.55 1.200
Transition 550 300 400 250 540 4.08 10.00 0.06 0.600
Straight Duct 550 300 550 300 840 1.5 0.8 5.09 15.60 1.200
Elbow 550 300 550 300 1485 9.00 48.76 0.18 8.777
Straight Duct 550 300 550 300 1485 2.5 0.8 9.00 48.76 2.000
Transition 650 400 550 300 1485 6.99 29.40 0.06 1.764
Straight Duct 650 400 550 300 1485 2.5 0.8 9.00 48.76 2.000
34 Transition 650 400 350 350 1485 7.76 36.29 0.08 2.904
Total 65.545
General accessories
1 ESP 150
2 HRW 90
3 Pre-filter 100
4 diffusser 30
5 Fire dampers(2#) 75
6 VCD 50
495.000
Total Pressure Drop 560.55
Total Static Pressure Loss for Duct & Duct Accessories (Pa) 560.55
Safety Factor 15% 84.08
Total Static Pressure Loss for Duct & Duct Accessories including Safety Factor (Pa) 644.63
SELECTED STATIC PRESSURE FOR: RETURN FAN,FAHU-T1-01 671.00
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