WP-Series Reverse Osmosis System
Installation Instructions and User Manual
Page | - 25 -
Temperature Correction Factor
The water temperature is one of the key factors in the performance of the reverse osmosis membrane element. The
higher the temperature, the more the product flow, and vice versa. All reverse osmosis membrane elements and
systems are rated at 77° Fahrenheit (25° Celsius).
To find the membrane permeate rate at a different temperature, follow these steps:
1.
Find the temperature correction factor (TCF) from the below table.
2.
Divide the rated permeate flow at 77° Fahrenheit by the temperature correction factor.
3.
The result is the permeate flow at the desired temperature.
EXAMPLE
QUESTION:
For a thin-film membrane permeate rated at 1800 gallons per day at 77º Fahrenheit, what is the actual
permeate rate at 59º Fahrenheit?
ANSWER:
Temperature correction factor (from below table) for 59ºF = 1.47
Permeate flow at 59 degrees Fahrenheit = 1800 ÷ 1.47 = 1224 gallons/day
Table 4 – Temperature Correction Factor
Feed Water Temperature
TCF for
Thin Film
TCF for
CTA/CAB
C º
Fº
1
33.8
3.64
2.23
2
35.6
3.23
2.15
3
37.4
3.03
2.08
4
39.2
2.78
2.00
5
41
2.58
1.93
6
42.8
2.38
1.87
7
44.6
2.22
1.80
8
46.4
2.11
1.74
9
48.2
2.00
1.68
10
50
1.89
1.63
11
51.8
1.78
1.57
12
53.6
1.68
1.52
13
55.4
1.61
1.47
14
57.2
1.54
1.42
15
59
1.47
1.38
16
60.8
1.39
1.33
17
62.6
1.34
1.29
18
64.4
1.29
1.25
19
66.2
1.24
1.21
20
68
1.19
1.17
21
69.8
1.15
1.13
22
71.6
1.11
1.10
23
73.4
1.08
1.06
24
75.2
1.04
1.03
25
77
1.00
1.00
Feed Water Temperature
TCF for
Thin Film
TCF for
CTA/CAB
C º
Fº
26
78.8
0.97
0.97
27
80.6
0.94
0.94
28
82.4
0.91
0.91
29
84.2
0.88
0.89
30
86
0.85
0.86
31
87.8
0.83
0.83
32
89.6
0.80
0.81
33
91.4
0.77
0.79
34
93.2
0.75
0.76
35
95
0.73
0.74
36
96.8
0.71
0.72
37
98.4
0.69
0.71
38
100.4
0.67
0.68
39
102.2
0.65
0.66
40
104
0.63
0.65
41
105.8
0.61
42
107.6
0.60
43
109.4
0.58
44
111.2
0.56
45
113
0.54
46
114.8
0.53
47
116.6
0.51
48
118.4
0.49
49
120.2
0.47
50
122
0.46
Содержание WP Series
Страница 31: ...Notes ...
