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Defining the Feed Water Flowrate and System Recovery

Feed and product water flowrates can be specified using the text boxes in the middles of the blue arrows as shown below. First, Feed or Permeate flow option should be selected using the radio button in the upper part of the arrow, later the flowrate can be specified.

Figure 1: Definition of feed or product flow for an RO system

Notes:

WAVE would display a warning if the Feed or Product flowrates are specified as 0 or a negative number
Given a feed water flowrate, WAVE would calculate a product flowrate based on a default recovery. Given a product water flowrate, WAVE would calculate a feed flowrate based on a default recovery
WAVE does not allow simultaneous specification of the feed and product flowrates

WAVE does give the user the possibility of defining a recovery that defines feed/product flow if product/feed flow is known (shown in Figure 2).

This is done by:
1. Right-clicking on the RO/ROSC icon
2. Selecting “Define Recovery”
3. Entering the desired recovery
4. Clicking “OK”
  Figure 2: Definition of recovery for an RO/ROSC system in the Home page

The default recovery value for RO & ROSC systems is 75% in WAVE. The recovery defined above is a system recovery, not necessarily a stage/pass recovery.

Additional Information: System Design Guidelines

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