Nortec Air Humidification System BS - Manual (Page 13)

25.05.05-A page 13 of 30
4.2 Notes on the planning of an air humidification system in several areas
Here we have only one room that is, however, divided up into two areas of humidification. When a room
has areas with different heat loads or when the number of air changes is not identical for the entire
room, the atomisers are not able to deliver sufficient measuring results. Certain areas would be
humidified not sufficiently and others too much. In these cases and similar cases, the room can be
divided up into two areas of humidification.
4.2.1 Example 2 (BS5/10)
The areas of humidification were determined on the basis of the room plan.
EXAMPLE 2
A DRAABE air humidification system BS for a direct humidification of the indoor air is to be installed
in a large printing works. The following data is available (index 1 for area 1, index 2 for area 2):
Room (l x w x h) in ft:
130.0 x 98.0 x 13.0
Area 1 98.0 x 98.0 x 13.0
Area 2 (suspended ceiling) 33.0 x 98.0 x 13.0
Number of air changes per hour: 3.0
1
, 1.5
2
Outside air conditions in winter: 5°F/90 % r.h.
Desired room temperature:
70°F
Desired air humidity: 53 % r.h.
Areas: Two
4.2.1.1 Calculating the maximum humidification capacity
The calculation is carried out as described under 4.1.1.1.
SOLUTION EXAMPLE 4
For the example area 1, the result is a necessary humidification capacity of 107 kg/h (236 lbs/h).
For the example area 2, the result is a necessary humidification capacity of 18 kg/h (40 lbs/h).
4.2.1.2 Determining the device requirements
Capacity BS5 5 kg/h (11 lbs/h)
Capacity BS10 10 kg/h (22 lbs/h)
EXAMPLE 3
For area 1:
8 units BS10
6 units BS5
For area 2:
2 units BS10
4 units transformers (trafo)