HydroMatik HeaterCompact, Руководство пользователя

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5.2 Absorption Distance B
N
The "absorption distance" (B
N
) is defined as the distance from
the steam feed to where the steam is completely absorbed in the
treated air. W ithin the ab sorption d istance, steam is visible as
mist in the air stream.
Condensation ma y occur o n anythin g inst alled within the
absorption distance.
Although st eam outside th e absorptio n dist ance (B
N
) is com-
pletely absorbed, it is not yet evenly diffused in the duct. If you
plan to inst all a ny p arts or device s in side the a bsorption dis-
tance, such a s sensors or elbows, we recommend increasing
the absorption distance using the formulae below. The absorp-
tion dist ances required for certain in stalled fittings are distin-
guished by separate symbols a nd calculated as a multiplier of
the absorption distance B
N
.
The absorptio n dist ance has no fixe d value, but depe nds on
many factors. T hese are dep icted in th e absorptio n dist ance
nomogram below.
5.2.1 Determining the Absorption Distance
To determine the absorption distance, the following parameters
are required:
•
Air humidity before humidification x
1
in g/kg.
•
Air temperature after humidification t
2
in °C (with steam
humidifiers the change in air temperature due to humid-
ification may be disregarded t
1
or t
2
).
•
Specific increase in humidity x in g/kg (can be deter-
mined in the h,x diagram)
•
quantity of steam introduced in kg/h.
•
air speed w
L
in m/s in air duct
•
Total length l
D
of the steam manifold installed in the air
duct
Absorption Distance
B
N
for normal obstructions, such as se n-
sors, ventilators, outlets
B
c
= (1,5...2) x B
N
for fine filters, heat registers
B
s
= (2,5...3) x B
N
for particle filters
B
d
= (2,5...3) x B
N
for humidity sensors, duct humidistats
o
D
m