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Agitater 4

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zamu2010

zamu2010

Bioengineer
Joined
Mar 18, 2010
Messages
42
Location
DK
Hi folks,
I need know the power demand for agitater to be installed a fermentation tank. Is they some online programme which can do the job.
Thanks in advance for your input on the issue.
Best Regards
Zahid Mushtaq
 
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I recommend you Google "agitator calculator" and/or "agitator calculation".

Good luck,
Latexman
 
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In most industrial fermentations, some air is sparged.
The usual correlations P= Np * rho * N^3 * D^5, described already do not account for the air sparged well.
The aerated power / anerated power can be as low as 0.4.

The motor drive should be sized for zero-air service, but the actual dissipated power, that serves gas liquid transfer will be lower.
 
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Thanks for your reply siretb,
What does Np and N stands for?
 
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Zamu2010,

Probably you’ve just taken a superficial glance at the paper I have previously posted (Np is the power number defined at page 5 formula (10), while N is the rotational speed of the impeller).
 
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Hi ione,
My appologies, I did extracted table 5 rule of tumb for my calculation from the document you sent. I should read the whole paper.
Thanks a lot. Its really a good document.
 
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