RO Data Trending and Normalization
The RO membranes are the heart of the RO system and certain data
points need to be collected to determine the health of the RO membranes. These
data points include the system pressures, flows, quality and temperature. Water
temperature is directly proportional to pressure. As the water temperature
decreases it becomes more viscous and the RO permeate flow will drop as it
requires more pressure to push the water through the membrane. Likewise, when
the water temperature increases the RO permeate flow will increase. As a
result, performance data for an RO system must be normalized so that flow
variations are not interpreted as abnormal when no problem exists. The
normalized flows, pressures and salt rejection should be calculated, graphed
and compared to the baseline data (when the RO was commissioned or after the
membranes were cleaned or replaced) to help troubleshoot any problems and also
determine when to clean or inspect the membranes for damage. Data normalization
helps display the true performance of the RO membranes. As a general rule of
thumb, when the normalized change is +/- 15% from the baseline data then you
need to take action. If you don't follow this rule then RO membrane cleanings
may not be very effective at brining the membranes back to near new
performance.
Yazh Pure Life
RO Water Purifier Sales and Service.
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