25
4. Basic Trans-Membrane Pressure Calculation
To calculate accurate Trans-Membrane Pressure (TMP), it is necessary to
involve the height difference of inlet and outlet pressure gauges.
Example calculation of TMP
TMP = (P
in
- H
in
) - (P
out
- H
out
)
= (70 - 10) - (20 + 25)
= 60 - 45
= 15 kPa
Note, the following formula may also be used:
TMP = P
in
- P
out
- total delta H
= 70 - 20 - (10 + 25) = 15 kPa
