54
Total Humidification Load Calculation
2596995_0_EN_1905
Nortec EL
Supply Line Losses
Condensate losses per linear foot can be roughly estimated in a system with properly designed atmos-
pheric steam lines. The total length of the atmospheric steam line must be taken into account, which
is the sum of the linear length of the steam pipe and equivalent length of every fitting in the line. For
equivalent lengths of common fittings see
. For design information on steam lines
"Atmospheric Steam and Condensate Lines" on page 34
.
Once total equivalent linear length is determined,
can be used to estimate the humidifier capacity
lost to supply line losses.
Table 19: Approximate Condensate Per Foot of Atmospheric Steam Line*
Steam Capacity
lb/h (kg/h)**
Nominal Steam Line
Size – Copper Tube
(MED Type-L)
in (mm)
Nominal Steam Line
Size – Stainless Steel
Tube (wall thickness
0.065 in)
in (mm)
Steam Loss in
Condensation
lb/h/ft (kg/h/m)
4-30 (1.8-14)
0.75 (19)
0.875 (22)
0.06 (0.09)
30-100 (14-45)
1.5 (38)
1.75 (45)
0.11 (0.18)
200-300 (91-136)
3 (76)
3 (76)
0.16 (0.23)
400-660 (181-299)
4 (102)
4 (102)
0.22 (0.33)
* Based on 1 in (25 mm) pipe insulation at 3 inches of water column (745 Pa) duct static pressure.
** Inclusive