TORAY UF
Instruction Manual
06-G-MB2-HFUG-B2315AN-220930
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5. Temperature Correction Factor
The permeability of the membrane is influenced by temperature mainly because the water
viscosity changes with temperature. It is necessary to eliminate the temperature effect with the
temperature correction factor (TCF) shown in Fig. 8 to evaluate the permeability correctly.
A Trans-Membrane Pressure (TMP) measured at some real temperature can be converted to
25 deg C corrected TMP with multiplying by TCF at real temperature.
A filtrate flow rate measured at some real temperature can be converted to 25 deg C corrected
filtrate flow rate with divided by TCF at real temperature.
The equation for calculating TCF at a temperature (T deg C) is as follows.
TCF = 0.0008902 / (0.01257187 x EXP((1
－
0.005806436 x (273.15 + T)) /
(0.001130911 x (273.15 + T) - 0.000005723952 x (273.15 + T) x (273.15 + T))) / 1000)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
10
20
30
40
膜供給水温度 (℃)
温度補正
係数
(-
)
Feed water temperature (deg C)
Temperature
correction
factor
Fig. 8. Temperature correction factor (TCF)
