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AXIAL FLOW FANS PERFORMANCE DATA
AXIAL FLOW FANS PERFORMANCE DATA
C-10
© FANTECH
2016
C
0
1.0
2.0
3.0
6.0
5.0
4.0
7.0
50
40
100
150
300
400
350
250
200
0
93
95
93
93
92
93
93
40˚
30
o
25
o
20
o
15
o
q
V
-Volume flow, m
3
/s
p
S
F-Fan static pressure, Pa
Blade angle 10˚
˚
20˚
10˚
30˚
20˚
15˚
5/ 150
14/250
P F
d
0634
24 rev/sec
3.5 AkW 3.0 2.5
2.0
1.5
1.0
1.5 AkW
1.0
0.75
0.5
2
5˚
35˚
35˚40˚
30˚
15˚
61 64 64 64 64
62
62 63 63
66 66 66 67
73 73 71 71 68 68
72 69 69
71 71
Absorbed kW
dB(A)@3m
66
9
6
10
8
7
1
3 4 11
5
2
61
61
The example shown here is for a 630mm axial flow fan (AP Series) running at 24 rev/sec in Type D installation (fully ducted).
It illustrates a duty of 2.5 m
3
/s at 150Pa static pressure.
1
Diameter of fan: 63cm (630mm)
2
Fan speed: 4 poles (24 rev/sec)
3
Number of blades: 5
4
Hub diameter: 150mm
5
Air volume flow: 2.5m
3
/s
6
Static pressure: 150 Pa
no correction is required as the curve
is plotted for Type D installation.
7
Duty point:
The point where the air volume flow line
intersects with the static pressure line.
8
Estimated sound: 66dB(A)
Estimated sound is the value
(in the circle) which is the closest to the
duty point.
9
Blade angle setting: 20°
The blade angle is determined by interpolating
a curve between the two defined blade angle
curves either side of duty point. (Solid blue curve)
10
Fan impeller absorbed power: P
R
= 0.65kW.
The fan impeller power is determined by interpolating
a curve between the two defined AkW curves either
side of the duty point (broken black curve).
11
Dynamic pressure: 39Pa
Dynamic pressure is the Y-axis value where the dynamic pressure
curve intersects the vertical line between air flow and duty point.
The Fan Total efficiency can be calculated by using the formula:
where:
q
v
= volume flow, m
3
/s
p
t
F = fan total pressure, Pa
= p
s
F + p
d
F
P
R
= fan impeller power, kW
How the performance curves work
Dynamic
Pressure