Specification of Tank Sizes

WAVE makes possible the specification of actual tank sizes vs calculated minima in the Tanks Window as shown in Figure 1.

Figure 1: Tank specifications for UF modelling in WAVE

This includes:

  1. Tank storage times and refill rates
    • By specifying how long the chemicals used are stored, given the rate of chemical consumption, WAVE can estimate the size of the chemical tanks.
    • In addition, given the Backwash tank refill rate, and the calculated Backwash flowrate, WAVE can calculate the size of the Backwash tank

  2. Tank size factors
    • WAVE allows the user to specify how big a safety factor for the tanks the user needs as shown in Figure 1. Any changes to these entries would result in recalculation of the tank volumes shown in the UF System Diagram.
      • –    For the BW or BW+Filtrate tank, WAVE defaults to a value of 100% of the computed minimum tank size. This is based on an analysis of the flows into and out of the tank. A value <100% means the tanks could be undersized and a value of >100% provides a safety margin.
      • –    WAVE defaults to a CIP tank which is 200% of the module volume to be cleaned: 100% is the volume to fill the modules with cleaning solution, while the remaining 100% is assumed to fill the tank, pump, or pipes.

Note:  A larger refill rate (larger % of filtrate flow directed to the tank) would fill up the tank faster.