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Steam Loss @ 25C (77F) kg/hr/m (lb/hr/ft)
Configuration
"SA***SI***
SA***HI***"
"SA***SN***
Uprights
SA***HN***"
SA***LI***
SA***LN***
SAB***I***
SAB***N***
Headers
SAT***I***
SAT***N***
Example: calculate the steam loss for an SATRQHI*** operating in a duct of
air velocity 6 m/s (1200 fpm) (59°F). (See "Technical specifications" , for the
dimensional data of distributors having other sizes and configurations)
1.
From the dimensional data of the distributor, calculate the upright length:
Overall height (3181 mm) (125") -
Inlet header height (167.5mm) (6.6") –
Condensate header (152.5mm) (6") =
Upright length (2861mm) (113")
Then:
. 0
42
kg / hr
(
)
. 0
42
(
)
kg / hr
2861
mm
37
uprights
=
44
(
)
(
)
2861
mm
37
uprights
=
44
. 0
1000
42
mm
kg / hr
(
)
mm
(
)
1000
2861
mm
. 0
42
37
uprights
=
kg / hr
(
)
(
)
2861
mm
1000
mm
37
uprights
=
44
1000
mm
. 0
28
lb / hr
(
)
(
. 0
28
lb / hr
125
.
25
"
−
. 6
25
"
−
" 5
37
uprights
(
(
)
125
.
25
"
−
. 6
25
"
−
" 5
37
uprights
12
in
. 0
28
lb / hr
(
)
12
in
(
125
.
25
"
−
. 6
25
"
−
" 5
37
uprights
. 0
28
lb / hr
(
)
(
125
.
25
"
−
. 6
25
"
−
" 5
12
in
37
uprights
12
in
5
6 .
kg / hr
2.
5
6 .
Given a header length of 3031 mm (119"),
(
)
kg / hr
kg
3031
mm
=
17
(
)
kg
=
17
3031
mm
hr
5
6 .
1000
mm
kg / hr
hr
(
)
1000
mm
kg
5
6 .
=
17
3031
mm
kg / hr
(
)
kg
hr
3031
mm
1000
mm
=
17
hr
1000
mm
3
8 .
lb / hr
(
)
3
8 .
lb / hr
lb
119
" 5 .
=
38
(
)
lb
119
" 5 .
=
38
hr
3
8 .
12
"
lb / hr
(
)
hr
12
"
lb
119
" 5 .
=
3
8 .
38
lb / hr
(
)
lb
119
" 5 .
hr
12
"
=
38
hr
12
"
3.
Total steam loss= 62 kg/hr (136lb/hr), that is, 5.5% of the 1110 kg/hr
(2442lb/hr) capacity.
For atmospheric humidifiers, every effort should be made to reduce
condensate production in the pipes connecting the humidifier to the
ultimateSAM distributor. For example, when connecting a high capacity
humidifier, such as a Carel UE130X****, to an ultimateSAM distributor, the
multiple steam outlets on the humidifier should be merged into a single
insulated pipe having the same cross-sectional area as the combined
areas of the multiple outlets. (See section 5 for adapters.) Table 4.k provides
information on steam loss in connecting pipes.
Steam Loss @ 25°C (77°F)
kg/hr/m (lb/hr/ft)
Size
Insulation
mm (in)
40mm hose
not available
80mm hose
not available
2" Sch 40
0
50 (2)
cast iron pipe
3" Sch 40
0
63 (2.5)
cast iron pipe
3" Cu
0
63 (2.5)
"K" tubing
"ultimateSAM - design" +03U0071EF - rel. 2.0 - 20150301
Air velocity m/s (fpm)
3 ( 600)
6 (1200)
10 (2000)
0.30 (0.20)
0.37 (0.25)
0.42 (0.28)
0.42 (0.28)
0.52 (0.35)
0.59 (0.39)
0.34 (0.23)
0.43 (0.29)
0.50 (0.34)
0.48 (0.32)
0.60 (0.40)
0.70 (0.47)
1.8 (1.2)
2.2 (1.5)
2.5 (1.7)
2.2 (1.5)
2.7 (1.8)
3.1 (2.1)
4.0 (2.7)
4.9 (3.3)
5.6 (3.8)
6.2 (4.2)
7.6 (5.1)
8.7 (5.8)
Tab. 4.m
kg
kg
hr
hr
kg
44
kg
hr
hr
)
lb
=
98
)
lb
=
98
hr
hr
)
lb
=
98
)
lb
hr
=
98
hr
Max. length
Steam loss
m (ft)
kg/hr/m (lb/hr/ft)
4 (13.1)
0.15 (0.10)
4 (13.1)
0.24 (0.16)
5 (16.4)
0.24 (0.16)
5 (16.4)
0.029 (0.019)
10 (32.8)
0.32 (0.21)
10 (32.8)
0.032 (0.021)
10 (32.8)
0.29 (0.19)
10 (32.8)
0.030 (0.020)
4.7 SAB* / SAT* assembly options
These distribution systems come with a frame designed to support the
uprights and distributors while providing flexibility during installation.
Although the distribution system with frame can be shipped fully-assembled
from the factory (product code SA*****3**), the system is designed for fast,
simple field-assembly with ordinary metric tools (product code SA*****2**).
For applications in which the frame for securing the uprights and distributor
headers will be provided by a third party at the site, the distribution system
can be provided without the frame (product code SA*****1** if assembled,
SA*****0** if not assembled).
4.8 Assembly options for SA0* systems
These distribution systems are supplied unassembled, the manifold and
uprights are therefore separate, and need to be fastened using the three
screws supplied.
They are delivered in the same packaging, containing the following
components:
•
Manifold
•
Insulated uprights with nozzles
•
Manifold gasket
•
Assembly instructions
This system can be fitted completely inside the duct or alternatively with
the manifold outside, in the latter case however a hole needs to be made in
the wall of the duct to pass the uprights through; a kit to cover the hole in
the wall of the AHU is available separately (code SAKIL00000).
4.9 Uninsulated upright option without
nozzles for SAB* / SAT*
This system is available with several options. To achieve optimal performance,
most applications will require the use of fully insulated uprights with nozzle
inserts (product code SA****I***). The insulation minimizes the formation
of condensate inside the upright. However, even with the insulation, some
condensate will form on the inner surface of the upright tube. To prevent
this condensate from being blown into the duct, nozzles are inserted into
the uprights to keep the steam entering the duct condensate-free.
There are some unique circumstances in which condensate droplets
entering the air stream might not pose a problem. For these situations,
the uprights are available without insulation and nozzle inserts (product
code SA****N***). Before using this type of upright, be sure to evaluate all
downstream surfaces in the AHU with respect to chemical compatibility,
corrosion resistance, and biological growth. This option should only be used
in applications that can tolerate pure liquid water.
The ultimateSAM steam distributor in the single pipe configuration (SA0)
only comes in the solution with insulated uprights complete with nozzles.
Tab. 4.n
20
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