GENERAL THEORY
11
VMT- v. JUNE 2008
3.4a
TEMPERATURE CORRECTION FACTOR
As previously described, the output capacity of any RO unit is highly dependent on feedwater
temperature. In order to quantify this relationship, operational data has been utilized to develop
Temperature Correction Factors (TCF). The TCF (which is compensated to 25°C/77°F) is used to
determine what part of any change in system output flow is due to variations in feedwater temperature
alone. This, in turn, allows the operator to establish the baseline flow for a given temperature, allowing
more accurate troubleshooting. The procedure for calculating the TCF and the temperature
compensated flow is as follows:
1) Measure sea water temperature.
2) Determine the corresponding correction factor from Table 3.2 based on the measured temperature.
3) Note the product flow rate at the Product Flow meter.
4) Multiply the measure (uncorrected) product flow meter flow rate by the correction factor from Table
3.2 to give the calculated system output under standard conditions (25°C).
Example:
Raw water temp:
15°C
TCF:
1.47
Actual product flow:
5.67 (gph)
Calculation:
5.67 x 1.47 = 8.3349 (gph)
Calculated product flow:
8.3 (gph)
(Adjusted to 75
°
)
(This is the normal flow for a LW 200)
°C Factor
°C
Factor
°F
Factor
°F
Factor
1
3.64
26
0.97
34
3.47
84
0.88
2
3.23
26
0.94
36
3.18
86
0.82
3
3.03
28
0.91
38
3.18
88
0.79
4
2.78
29
0.88
40
2.68
90
0.79
5
2.58
30
0.85
42
2.47
92
0.77
6
2.38
31
0.83
44
2.29
94
0.75
7
2.22
32
0.80
46
2.14
96
0.73
8
2.11
33
0.77
48
2.01
98
0.70
9
2.00
34
0.75
50
1.88
100
0.68
10
1.89
35
0.73
52
1.77
102
0.65
11
1.78
36
0.71
54
1.68
104
0.63
12
1.68
37
0.69
56
1.59
106
0.61
13
1.61
38
0.67
58
1.51
108
0.59
14
1.54
39
0.65
60
1.44
110
0.57
15
1.47
40
0.63
62
1.36
112
0.55
16
1.39
41
0.61
64
1.30
114
0.53
17
1.34
42
0.60
66
1.24
116
0.51
18
1.29
43
0.58
68
1.17
118
0.49
19
1.24
44
0.56
70
1.12
120
0.47
20
1.19
45
0.54
72
1.08
122
0.45
21
1.15
46
0.53
74
1.05
22
1.11
47
0.51
76
1.02
23
1.08
48
0.49
78
1.00
24
1.04
49
0.47
80
0.93
25
1.00
50
0.46
82
0.90
Table 3.2 - Temperature Correction Factors
Содержание LW-160
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Страница 9: ...Village Marine Tec Freshwater From the Sea Little Wonder Frame Plumbing Diagram 2008...
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Страница 33: ...PLUMBING DIAGRAMS 25 VMT v JUNE 2008 9 0 PLUMBING DIAGRAMS...
Страница 34: ...Village Marine Tec Freshwater From the Sea Little Wonder Frame Plumbing Diagram 2008...
Страница 35: ...PARTS REFERENCE 26 VMT v JUNE 2008 10 0 PARTS REFERENCE...
Страница 36: ...Little Wonder Frame Main Parts Reference Village Marine Tec 2008 Freshwater From the Sea...
Страница 37: ...MANUFACTURER S LITERATURE 27 VMT v JUNE 2008 11 0 MANUFACTURER S LITERATURE...
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Страница 41: ...LIST OF TABLES Table 1 Approximate Horsepower Required 3 Table 2 Tool List For Pump Service 12...
Страница 67: ...708 Series High Pressure Titanium Positive Displacement Pump 26...
Страница 68: ...708 1 DRAWINGS...