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BioSTEAMDevelopmentGroup / biosteam

The Biorefinery Simulation and Techno-Economic Analysis Modules; Life Cycle Assessment; Chemical Process Simulation Under Uncertainty
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Power consumption default in AeratedBioReactor needs more detail #171

Closed siddharthab closed 1 year ago

siddharthab commented 1 year ago

In AeratedBioReactor (and now GasFedBioReactor), I was not able to find the basis for the default value of kw/m3. https://github.com/BioSTEAMDevelopmentGroup/biosteam/blob/1e1b2029ec741fbe05fc8d47f90149961ed24488/biosteam/units/stirred_tank_reactor.py#L416

In similar process simulations elsewhere, I have seen people use ~1 kw/m3 even for aerated bioreactors, just like biosteam does for stirred tank reactors.

A reference citation or some more detail on this constant would be helpful.

yoelcortes commented 1 year ago

I have been meaning to add references to this new unit. I just added them for the aerated bioreactor design. The default value comes from Seider's Product and Process Design Principles (ref 1) and it's similar to values in the other references. I don't have the book with me, so I cannot add the exact page number...

From my experience, 1 kw/m3 is too high for an aerated bioreactor, where much of the mixing comes from compressed air. Regardless, this a design choice which can be optimized (less mixing power means greater air flow rate to meet the oxygen uptake rate).

Thanks!

siddharthab commented 1 year ago

Thanks for such a quick resolution!