Defensor Mk4 Manuel page 22

2.4 Positioning the steam distribution heads
22
The location for the steam distribution heads should be determined at the time of
dimensioning the air conditioning system. Please note the following instructions to
ensure proper humidification of the duct air.
Calculating the humidification distance
A minimum distance (humidification distance "B
steam distribution head so that water vapour emerging from the head does not
condense on the following system components.
Humidification
distance B n
ϕ1
ϕ1: Incoming air humidity before humidification
ϕ2: Air humidity after humidification
1xB n
The calculation of the humidification distance "B
For a rough estimation of the humidification distance "B
useful. Recommended standard values listed in this table are based on a supply-
air temperature range of 10°C to 30°C.
Length of humidification distance B
ϕ1
40 50
5 0.9 1.1
0.8 1.0
10
20 0.7 0.9
30 0.5 0.8
– 0.5
40
50 –
–
60
70 –
ϕ1 in %rh: Relative supply air humidity prior to humidification at the lowest supply
air temperature.
ϕ2 in %rh: Relative supply air humidity after the steam distribution head at
maximum capacity.
Example
given:
humidification distance B
n
Note: If the humidification distance has to be reduced for technical reasons, the
amount of steam per unit modul must be divided between two steam distribution
heads. If this is the case, contact your Defensor supplier.
") must be observed from the
n
Expansion- and mixing zone
" is dependent on several factors.
n
ϕ2
60 70
1.4 1.8
1.3 1.7
1.2 1.5
1.0 1.4
0.8 1.2
– 0.6 1.0
– – 0.7
– – –
ϕ1= 30 %rh, ϕ2= 70 %rh
:
ϕ2
5xB n
", the following table is
n
in m
n
80 90
2.3 3.5
2.2 3.4
2.1 3.2
1.9 2.9
1.7 2.7
1.5 2.4
1.2 2.1
0.8 1.7
1,4 m