21
ULTRA-SORB MODEL MP INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Performance data
Table 21-1:
Ultra-sorb air pressure loss
Duct air velocity
(55 ˚F at sea level)
Tube spacing
3"
75 mm
6"
150 mm
Uninsulated tubes
fpm
m/s
wc
Pa
wc
Pa
500
2.54
0.020
5.1
0.004
1.1
1000
5.08
0.082
20.5
0.017
4.2
1500
7.62
0.175
43.8
0.038
9.5
High-efficiency tubes
fpm
m/s
wc
Pa
wc
Pa
500
2.54
0.033
8.3
0.005
1.3
1000
5.08
0.121
30.2
0.020
5.1
1500
7.62
0.237
59.2
0.046
11.5
Notes:
• Ultra-sorb panels with 9" (225 mm) or 12" (300 mm) tube spacings
have no measurable air pressure loss.
• Use DriSteem’s DriCalc sizing and selection application to calculate
your specifi c air pressure loss.
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OPERATION
CAUTION
Installing the Ultra-sorb panel upstream
from fi lter media
Non-wetting distances described
here do not apply when installing an
Ultra-sorb panel upstream from fi lter
media. If you must install upstream
from fi lter media, consult DriSteem or
your local DriSteem representative for
recommendations.
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NON-WETTING DISTANCE
Non-wetting distance is the distance downstream from the leaving side of
the steam dispersion assembly to the point where wetting will not occur.
This distance is dependent on several application parameters. To determine
your dispersion assembly’s non-wetting distance, consult your system’s
design engineer or project documentation. Non-wetting distance can also be
calculated using DriSteem’s DriCalc sizing and selection application, available
at www. dristeem.com. Note that your current design conditions may vary from
conditions used for system design.
• Note that the rise in relative humidity (ΔRH) between entering and leaving
air has a direct bearing on the non-wetting distance.
As the change in relative humidity (ΔRH) increases, the
non-wetting distance increases.
• Uneven airfl ow over the Ultra-sorb panel cross-section
may result in nonuniform mixing of steam with air,
which may adversely affect absorption distance.
• A small amount of duct air pressure loss will be present
downstream from the Ultra-sorb panel, depending
on air density, velocity, and tube spacing. See Table
21-1.
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