% VAPOR TRAIL IN METER / RH MAX=RH2-RH1 in %
Rh2
5
10
15
20
30
40
50
60
75
90
40
0,3 0,4 0,5 0,6 0,7 0,8
-
-
-
-
50
0,4 0,5 0,6 0,7 0,8 0,9
1
-
-
-
60
0,4 0,5 0,6 0,7 0,9
1
1,1 1,2
-
-
70
0,5 0,6 0,7 0,9
1
1,2 1,3 1,5
-
-
80
0,5 0,7 0,9
1
1,2 1,4 1,6 1,8
2
-
85
0,6 0,8
1
1,2 1,4 1,6 1,8
2
2,3
-
90
0,7
1
1,2 1,4 1,7
2
2,3 2,5 2,8
3
95
1
1,4 1,7
2
2,5 2,9 3,2 3,5 3,9 4,3
% VAPOR TRAIL IN
INCHES
/ RH MAX=RH2-RH1 in %
Rh2
5
10
15
20
30
40
50
60
75
90
40
11.8 15.7 19.7 23.6 27.5 31.5
-
-
-
-
50
15.7 19.7 23.6 27.5 31.5 35.4 39.4
-
-
-
60
15.7 19.7 23.6 27.5 35.4 39.4 43.3 47.2
-
-
70
19.7 23.6 27.5 35.4 39.4 47.2 51.2 59
-
-
80
19.7 27.5 35.4 39.4 47.2 55.1 63 70.8 77.7
-
85
23.6 31.5 39.4 47.2 55.1
63 70.8 77.7 90.5
-
90
27.5 39.4 47.2 55.1 67 77.7 90.5 98.4 110.2 118.1
95
39.4 55.1 67 77.7 98.4 114.2 126 137.8 153.4 169.3
ElectroVap MC
Calculation of the evaporation distance
13
Installation
In order to determine the evaporation distance, the
enclosed calculation table can be used with :
RH1 = relative humidity of the air before humidification
RH2 = Relative humidity of the air after humidfication in %
RH Max = maximum difference between RH1 & RH2
HOW TO USE THE CALCULATION
TABLE
Determine the difference between the relative humidity
after the humidification (RH2) and the relative humidity
(RH1) before humidification. The intersection between the
deducted maximum RH value and RH2 gives the
evaporation distance in meters (or in inches).
The tables show the D distance (in meter/inches) that
should be between the steam pipe and the first obstacle
(s.a. pipe positioning drawings on the lelft hand side).
If the require distance cannot be obtained on site, it is
possible to install two pipes in parallel to have a better
steam distribution.
NOTA :
the evaporation distance shown in the
enclosed tables are for temperature between 10°C (50°F)
and 25°C (77°F) and for an air velocity of 2.5 m/s (8.20
ft/s).
If accurate values cannot be reached, a distance of 2 m.
(78 ft) should be considered as a minimum distance
between pipes & obstruction.
Before or after ventilation area
After expansion or before constriction
Vapor trail = 0.5 D
Before control sensor allow
3 – 5D for evaporation
Before / after filter depending on filter type
1
3
