Climate control

Climate control – 19" fan racks
19" fan dimensions
V (m 3 /h)
19" blower unit
19" fan unit
For local heat dissipation, the airflow volume required to extract
the (energy loss) heat is calculated.
P v (W)
A41771
Note
The cabinet ventilation is not taken into account here.
The required airflow volume is calculated as follows:
V= (f x P v ) / T
The air constant f = 3.3 mm 3 K/Wh.
T is the difference between the ambient temperature and the
internal temperature.
Example
- Pv = 600 W
- internal temperature = 25 °C
- ambient temperature = 30 °C
1. T = T i – T a = 30 °C – 25 °C = 5 K
2. From P v = 600 W for curve for T =5 K
3. From the point of intersection down to the airflow volume
V = 400 m 3 /h
19" fan racks
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UK 08/2003
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