36
ENG
Steam distribution
g0300122EN rel. 1.0 - 01.12.2021
8. STEAM
DISTRIBUTION
8.1
S
team distribution
To achieve optimal humidifi er effi
ciency, the steam produced must be introduced into the room uniformly, in order to prevent
the formation of droplets and condensation. This is achieved using linear steam distributors. The right steam distributor must be
chosen according to the place where the steam is to be introduced.
Information on the absorption distance
The steam introduced into the AHU/duct must be absorbed by the air, and therefore a free space without obstacles where
condensation may form is required. This length, downstream of the steam distributor, is defi ned as the non-wetting distance or
“absorption distance” (A
D
in the fi gure).
A
D
3x A
D
rH
2
rH
1
Fig. 8.a
3x A
D
A
D
A
D
1,5x A
D
O
stacolo
2,5x A
D
N
el caso di filtro ad alta efficienza
Distanza minima prima di un componente
Distanza minima prima di un ventilatore
Distanza minima prima di una sonda limite
Distanza minima da una curva
Fig. 8.b
8.1.1 Linear distributors for air ducts or
A
HUs
The steam distributors for AHU (air handling unit) or duct applications (sold separately) deliver steam along their entire length in
order to ensure the shortest not-wetting distance. The distributor must be chosen based on:
• maximum capacity required;
• dimensions of the AHU/duct;
• outlet diameter on the humidifi er it is connected to.
Notice:
install away from any obstacles (curves, branches, changes in cross-section, grilles, fi lters, fans). Minimum distance
between distributor and obstacle: 1 - 1.5 m (3.3 - 4.9 ft).
Increase the distance in the event of:
• increased air speed in the duct;
• less
turbulence.
rH1: humidity upstream of the steam distributor
rH2: humidity downstream of the steam distributor
AD: absorption distance
Air Flow
Limit probe
Minimum distance before a limit probe
Minimum distance before a component
Minimum distance before a fan
Minimum distance from a curve
1.5x AD Obstacle
2,5x AD In the case of high effi
ciency fi lter