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Example 2: Assume that a site has the following conditions:
•
Inside duct dimensions:
•
3000 mm wide (118");
•
3000 mm high (118");
•
Insulated uprights w/ nozzle inserts;
•
Fan downstream of distributor limits downstream clearance to 700 mm
(27.6");
•
Relative humidity after distributor (RHa): 82%;
•
Relative humidity before distributor (RHb): 10% @ 15°C (59°F);
•
Humidification load: 750 kg/hr (1654lb/h);
•
Pressurized steam source;
•
Control valve located outside of duct, as shown in Fig. 1;
•
Distributor drain located outside of duct, as shown in Fig.1.
4.1.2
Steam capacity, SA0* version
Upright length
code
mm (in)
SA0AALI0*0
358 (14.1)
SA0BALI0*0
510 (20.1)
SA0CALI0*0
662 (26.1)
SA0DALI0*0
814 (32.0)
SA0EALI0*0
966 (38.0)
SA0FALI0*0
1118 (44.0)
SA0GALI0*0
1270 (50.0)
SA0HALI0*0
1422 (56.0)
SA0IALI0*0
1574 (62.0)
SA0JALI0*0
1726 (68.0)
SA0KALI0*0
1878 (73.9)
SA0LALI0*0
2030 (79.9)
Example 1: application with the following conditions:
•
Dimensioni interne condotta:
-
Width 1200 mm (47.2")
-
Height 800 mm (31.5")
•
No impediment in the duct downstream
•
Humidification load required: 35 kg/h (77 lb/h)
•
Supplied by atmospheric humidifier (UE035X****)
•
Condensate drain trap situated outside of the duct, as shown in Fig. 1
1.
Based on the duct inside width of 1200 mm (47.2") and the data in Table
C, a length code "F" (1118mm [44"]) represents the best choice.
2.
Table 4.b shows that the SA0 model with length code "F" has a maximum
flow-rate with atmospheric feed of 35 kg/h (77 lb/h).
3.
As there are no significant obstacles downstream in the duct, such as
fans, cooling coils or curved section, the absorption distance is not
necessarily a critical design factor for the application.
4.
The distributor is supplied by a humidifier, which requires maximum
backpressure in the supply line to be checked.
Code for this example: SA0FALI0*0
"ultimateSAM - design" +03U0071EF - rel. 2.0 - 20150301
Maximum steam flow-rate at atmospheric pressure
(SA0 supplied by steam humidifier) kg/h (lb/h)
20 (44)
20 (44)
50 (110)
50 (110)
50 (110)
50 (110)
50 (110)
50 (110)
50 (110)
50 (110)
50 (110)
50 (110)
1.
Based on the duct width of 3000 mm (118") and the data from Table 2,
a "Q" width (2879 mm)(113") distributor would be the best choice. This
allows ~60 mm (~2 ½") clearance on both sides to tilt the distributor for
drainage.
2.
For a humidification load of 750 kg/hr (1650 lb/hr), Table 4.a shows that
the following configuration could be used:
-
Top feed, "L" configuration – for up to 900 kg/hr (1984lb/h) (This
configuration uses fewer uprights than the "H" configuration)
3.
Based on the duct height of 3000 mm (118") and the need for a top feed
system, an "O" height (2877 mm) (113") distributor would be the best
choice.
4.
Given the 700 mm (27.6") downstream clearance, the configuration
must change to the "H" configuration to get an acceptable absorption
distance. (The absorption distance for the "L" configuration is too long
for this application. See example in section 4.3.)
-
Part number for this example: SATQOHI200 (assuming insulated
distributor with frame, shipped unassembled)
Maximum steam fl ow-rate with pressurised
steam (0-4 bars, 0-58psi) kg/h (lb/h)
20 (44)
30 (66)
50 (110)
60 (132)
70 (154)
80 (176)
90 (198)
100 (220)
110 (242)
120 (264)
130 (286)
140 (308)
Example 2: application with the following conditions:
•
Duct width of 1000 mm (39.4")
•
Duct height of 500 mm (19.7")
•
Fan downstream of the distributor that limits the free space to 900 mm
(35.4")
•
Relative humidity after the distributor (RHa): 80%;
•
Relative humidity before the distributor (RHb): 55% @ 25ºC [77°F];
•
Humidification load: 62.6 kg/h (138 lb/h);
•
Supplied from pressurised steam system;
•
Control valve located outside of the duct, as in Fig. 1.;
•
Condensate drain trap situated outside of the duct, as shown in Fig. 1;
1.
Based on the duct inside width of 1000 mm (39.4") and the data in Table
4.b, a width code "E" (966 mm [38"]) represents the best choice.
2.
Table 4.b shows for this upright length a humidification load of 70 kg/h
(154 lb/h).
3.
Considering the limited free space downstream of 900 mm (35.4"), the
absorption distance needs to be calculated (see par 4.3), being a little
over 600 mm (23.6").
Code for this example: SA0EALI0*0.
14
Minimum width of the
duct mm (in)
383 (15.1)
535 (21.1)
687 (27.0)
839 (33.0)
991 (39.0)
1143 (45.0)
1295 (51.0)
1447 (57.0)
1599 (63.0)
1751 (68.9)
1903 (74.9)
2055 (80.9)
Tab. 4.c
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