31
Data for quick calculations of PSI for EvaPack
™
and tap water
TDS
(μS/cm)
(μMHO’s)
A
T
B
[Ca
2+
]
C
TAC
D
TAC
pH
eq
(ºC)
(ºF)
(mg/l)
(PPM as
CaCO
3
)
(mmol/l)
PPM (as
CaCO
3
)
(mmol/l)
PPM (as
CaCO
3
)
50
0.06
10
50
2.38
4
10
0.6
0.2
10
1.0
0.2
10
6.0
100
0.09
11
51.8
2.36
6
15
0.8
0.3
15
1.2
0.3
15
6.3
150
0.10
12
53.6
2.34
8
20
0.9
0.4
20
1.3
0.4
20
6.4
200
0.12
13
55.4
2.32
10
25
1.0
0.5
25
1.4
0.5
25
6.6
250 - 300
0.13
14
57,2
2.30
12-14
30-35
1.1
0.6-0.7
30-35
1.5
0.6
30
6.7
350
0.14
15
59
2.28
16
40
1.2
0.4
40
1.6
0.7
35
6.8
400 - 450
0.15
16
60.8
2.26
18-22
45-55
1.3
0.9-1.1
45-55
1.7
0.8
40
6.9
500 - 600
0.16
17
62.6
2.24
24-28
60-70
1.4
1.2-1.4
60-70
1.8
0.9-1.0
45-50
7.0
650 - 750
0.17
18
64.4
2.22
30-34
75-85
1.5
1.5-1.7
75-85
1.9
1.1-1.2
55-60
7.1
800 - 950
0.18
19
66.2
2.20
36-44
90-110
1.6
1.8-2.2
90-110
2.0
1.3-1.4
65-70
7.2
1000 - 1200
0.19
20
68
2.18
46–56
115-140
1.7
2.3-2.8
115-140
2.1
1.5-1.6
75-80
7.3
1250 - 1550
0,20
21
69.8
2.17
58-70
145-175
1.8
2.9-3.5
145-175
2.2
1.7-1.9
85-95
7.4
1600 - 1950
0.21
22
71.6
2.15
72–88
180-220
1.9
3.6-4.4
180-220
2.3
2.0-2.2
100-110
7.5
2000 - 2450
0.22
23
73.4
2.13
90–112
225-280
2.0
4.5-5.6
225-280
2.4
2.3-2.6
115-130
7.6
2500 - 3100
0.23
24
75.2
2.11
114-140
285-350
2.1
5.7-7.0
285-350
2.5
2.7-3.1
135-155
7.7
3150 - 3900
0.24
25
77
2.09
142–178
355-445
2.2
7.1-8.9
355-445
2.6
3.2-3.6
160-180
7.8
3950 - 4950
0.25
180–
224
450-560
2.3
9.0-11.2
450-560
2.7
3.7-4.2
185-210
7.9
5000
0.26
226–
280
565-700
2.4
11.3-14.0
565-700
2.8
4.3-4.9
215-245
8.0
5.0-5.8
250-
290
8.1
5.9-6.8
295-340
8.2
6.9-7.9
345-395
8.3
8.0-9.3
400-
465
8.4
9.4-10.9
470-545
8.5
11.0-12.7
550-
635
8.6
12.8-14.0
640-
700
8.7
PSI interpretation
If PSI < 6.0: Scale forming (not usable water)
If 6.0 ≤ PSI < 7.0: water is stable (Usable water for direct water system
only)
If PSI> 7.0: Scale dissolving (usable water for RW & DW systems)
Bleed-off flow rate calculation
Bleed-off =
(Carrier 1965)
Evaporation
COC-1
Suitable only for DW
PSIwater
COC
6.1
1.04
6.2
1.09
6.3
1.14
6.4
1.19
6.5
1.24
6.6
1.30
6.7
1.36
6.8
1.42
6.9
1.48
7.0
1.55
7.1
1.62
Suitable for RW or DW
PSIwater
COC
PSIwater
COC
PSIwater
COC
PSIwater
COC
PSIwater
COC
7.2
1.69
8.2
2.62
9.2
4.05
10.2
6.28
11.2
9.72
7.3
1.77
8.3
2.73
9.3
4.23
10.3
6.56
11.3
10.15
7.4
1.84
8.4
2.86
9.4
4.42
10.4
6.85
11.4
10.61
7.5
1.93
8.5
2.98
9.5
4.62
10.5
7.16
11.5
11.08
7.6
2.01
8.6
3.12
9.6
4.83
10.6
7.48
11.6
11.58
7.7
2.10
8.7
3.26
9.7
5.04
10.7
7.81
11.7
12.10
7.8
2.20
8.8
3.40
9.8
5.27
10.8
8.16
11.8
12.64
7.9
2.30
8.9
3.55
9.9
5.50
10.9
8.52
11.9
13.20
8.0
2.40
9.0
3.71
10.0
5.75
11.0
8.91
12.0
13.79
8.1
2.51
9.1
3.88
10.1
6.01
11.1
9.30
Concentration cycle number (COC) in function of PSI value
Summary of Contents for EvaPack Series
Page 46: ...46 Notes...
Page 47: ...47 Notes...
