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TRG-TRC013-EN 13
period one
Fan Performance
notes
Next, the fan laws are used to calculate the performance characteristics of this
same fan at other rotational speeds. The subscript
1
refers to the tested
performance conditions; the subscript
2
refers to the calculated performance
conditions.
The result is a family of curves that represents the specific fan’s airflow capacity
at various speeds and static pressures.
airflow
airflow
static pressure
static pressure
f
a
n
s
p
e
e
d
f
a
n
s
p
e
e
d
1
,
1
0
0
r
p
m
1
,
1
0
0
r
p
m
9
0
0
r
p
m
9
0
0
r
p
m
7
0
0
r
p
m
7
0
0
r
p
m
5
00
r
pm
5
00 r
p
m
Fan Speed
Figure 19
Airflow
2
Airflow
1
-----------------------
Fan Speed
2
Fan Speed
1
--------------------------------
=
Static Pressure
2
Static Pressure
1
---------------------------------------------
Fan Speed
2
Fan Speed
1
--------------------------------
2
=
Input Power
2
Input Power
1
-------------------------------------
Fan Speed
2
Fan Speed
1
--------------------------------
3
=