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Equations and algorithm for Reverse Osmosis membranes comparison

Reverse Osmosis and Nanofiltration membrane datasheets specifications are good for evaluating the quality of the delivered products but almost useless to compare products performance. The main reason for that is that every membrane was tested under different conditions (pressure, salinity, solution composition, recovery, pH and temperature).

Water mass transport coefficient (A-Value) and Salt mass transport coefficient (B-value)

RO and NF membranes can be defined by two parameters known in the industry as A and B-values.

 

Fuel consumption spreadsheet

This spreadsheet calculates and keep track of the fuel consumption of vehicles. The result can be displayed in several ways including averages, statistics, graphics and multiple units. The main advantage of this spreadsheet compared to others is the ability to handle partial tank fills.

Last, the spreadsheet is not password protected so you can customize-it as you like.