33
Draining set-up example:
The data are: Evapack™ basin length: 900 mm
Water evaporation flow: 70 l/h
COC = 2 then bleed-off water flow = 70 l/h
The total draining duration = 70 l/h / 0.7 (l/s) = 100 s/h.
The draining valve must be opened 100s/h for a bleed-off of 70 l/h. The water basin can be emptied in 61s. It
is not possible to open the draining valve 100s in once because after 61s only fresh water will be eliminated.
These 100s/h must be distributed judiciously in one hour, at least with draining duration < 30s (61s/2).
A drain duration of 17s (6 times/h) each 9 min. (drain frequency) can be used.
Data for quick bleed-off set-up
Water hardness levels
Very Soft water
TH: < 60 PPM as CaCO
3
TAC: < 0,6 mmol/l
Average COC: 6.0
Soft Water
TH: 60-120 PPM as
CaCO
3
TAC : 0,6 – 1.4 mmol/l
Average COC: 3.5
Hard water:
TH: 120-180 PPM as
CaCO
3
TAC: 1.4 – 2.4 mmol/l
Average COC: 2.5
Very hard water:
TH: 180-220 PPM as
CaCO
3
TAC : 2.4 – 3.0 mmol/l
Average COC: 2.0
Basin
width
(mm)
Basin
width
(inch)
Drain
duration
(s)
Drain
frequency
cycle (min.)
Drain
duration
(s)
Drain
frequency
cycle (min.)
Drain
duration
(s)
Drain
frequency
cycle (min.)
Drain
duration
(s)
Drain
frequency
cycle (min.)
500
20
5
19
9
19
14
19
12
11
600
24
5
19
9
19
14
19
12
11
700
28
7
14
12
14
18
14
17
9
800
31
7
14
12
14
18
14
17
9
900
35
7
14
12
14
18
14
17
9
1000
39
15
11
24
11
28
8
29
5
1100
43
15
11
24
11
28
8
29
5
1200
47
15
11
24
11
28
8
29
5
1300
51
17
11
29
9
36
6
39
4
1400
55
17
11
29
9
36
6
39
4
1500
59
17
11
29
9
36
6
39
4
1600
63
21
11
35
9
44
6
48
4
1700
67
21
11
35
9
44
6
48
4
1800
71
21
11
35
9
44
6
48
4
1900
75
25
11
42
9
52
6
52
4
2000
79
25
11
42
9
52
6
52
4
2100
83
25
11
42
9
52
6
52
4
2200
87
29
11
48
9
54
5
56
3
2300
91
29
11
48
9
54
5
56
3
2400
94
29
11
48
9
54
5
56
3
2500
98
31
9
53
7
61
4
61
2
2600
102
31
9
53
7
61
4
61
2
2700
106
31
9
53
7
61
4
61
2
2800
110
34
9
59
7
68
4
68
2
2900
114
34
9
59
7
68
4
68
2
3000
118
34
9
59
7
68
4
68
2
Drain duration and drain frequency may be reduced if no white minerals deposit is visible on the pad surface,
or if lime scale deposit is visible on the pad.
Summary of Contents for EvaPack Series
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