Add Multi-Stage RO Flowsheet and UI

[kurbansitterley]

Fixes/Resolves:

Adds multi-stage RO flowsheet and UI file.

Summary/Motivation:

This flowsheet was created for a separate analysis effort and would be useful to have in main WaterTAP since there isn't something similar, and multi-stage RO might be a common system for users to need to model.

The code is written such that a user can create a flowsheet with any number of stages for any inlet condition (flow and concentration). From the build function, the user can specify:

• flow rate
• salinity
• number of stages
• to include booster pumps or not (and where they should be in the process flow)
• to an include an ERD or not
• the property package to use (temp dep NaCl or SW supported currently)
• membrane parameters
• max allowable pumping pressure
• max allowable permeate concentration

The test file represents the spectrum of conditions that I have tested that the default settings for flowsheet is stable for.

• salinity: 5-75 g/L (note can be extended to 100 g/L)
• flow: 1-10 L/s
• number of stages: up to 3 with booster between 1 + 2
• recovery: 40-60%

Extensions of these ranges may be stable but haven't been tested. More fine-grained tests could be added but would extend testing time. Currently runs ~5 min locally for testing time.

Changes proposed in this PR:

• add multi-stage RO flowsheet file
• add multi-stage RO UI file
• add test file

Legal Acknowledgement

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1. I agree my contributions are submitted under the license terms described in the LICENSE.txt file at the top level of this directory.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[adam-a-a]

This seems like a pretty restrictive upper bound on inlet crossflow velocity. How necessary is this?

[adam-a-a]

Same question here- is this lower bound really necessary?

[kurbansitterley]

this may have just been necessary for the analysis implementation, but there also may be a practical/design reason that @avdudchenko can maybe comment on

[adam-a-a]

@kurbansitterley before I go further, any reason why this is still in draft mode?

[kurbansitterley]

@kurbansitterley before I go further, any reason why this is still in draft mode?

I need to create a figure/pfd for it

[MarcusHolly]

LGTM - just a few comments to address as well as the failing test. I've tested the GUI and everything seems to be working fine

[MarcusHolly]

Delete?

[MarcusHolly]

Should this be deleted?